

<!--XBRL Document Created with Wdesk from Workiva, formerly WebFilings-->
<!-- -->
<linkbase xsi:schemaLocation="http://www.xbrl.org/2003/linkbase http://www.xbrl.org/2003/xbrl-linkbase-2003-12-31.xsd" xmlns="http://www.xbrl.org/2003/linkbase" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
  <roleRef roleURI="http://www.aligntech.com/role/AccountingForIncomeTaxes" xlink:href="algn-20150331.xsd#AccountingForIncomeTaxes" xlink:type="simple" />
  <roleRef roleURI="http://www.aligntech.com/role/AccountingForIncomeTaxesAdditionalInformationDetails" xlink:href="algn-20150331.xsd#AccountingForIncomeTaxesAdditionalInformationDetails" xlink:type="simple" />
  <roleRef roleURI="http://www.aligntech.com/role/AccruedLiabilitiesDetails" xlink:href="algn-20150331.xsd#AccruedLiabilitiesDetails" xlink:type="simple" />
  <roleRef roleURI="http://www.aligntech.com/role/ActivityUnderStockOptionPlansDetails" xlink:href="algn-20150331.xsd#ActivityUnderStockOptionPlansDetails" xlink:type="simple" />
  <roleRef roleURI="http://www.aligntech.com/role/BalanceSheetComponents" xlink:href="algn-20150331.xsd#BalanceSheetComponents" xlink:type="simple" />
  <roleRef roleURI="http://www.aligntech.com/role/BalanceSheetComponentsAdditionalInformationDetails" xlink:href="algn-20150331.xsd#BalanceSheetComponentsAdditionalInformationDetails" xlink:type="simple" />
  <roleRef roleURI="http://www.aligntech.com/role/BalanceSheetComponentsTables" xlink:href="algn-20150331.xsd#BalanceSheetComponentsTables" xlink:type="simple" />
  <roleRef roleURI="http://www.aligntech.com/role/BusinessCombinationsDetails" xlink:href="algn-20150331.xsd#BusinessCombinationsDetails" xlink:type="simple" />
  <roleRef roleURI="http://www.aligntech.com/role/BusinessCombinationsNotes" xlink:href="algn-20150331.xsd#BusinessCombinationsNotes" xlink:type="simple" />
  <roleRef roleURI="http://www.aligntech.com/role/ChangeInCarryingValueOfGoodwillDetails" xlink:href="algn-20150331.xsd#ChangeInCarryingValueOfGoodwillDetails" xlink:type="simple" />
  <roleRef roleURI="http://www.aligntech.com/role/CommitmentsAndContingencies" xlink:href="algn-20150331.xsd#CommitmentsAndContingencies" xlink:type="simple" />
  <roleRef roleURI="http://www.aligntech.com/role/CommitmentsAndContingenciesTables" xlink:href="algn-20150331.xsd#CommitmentsAndContingenciesTables" xlink:type="simple" />
  <roleRef roleURI="http://www.aligntech.com/role/CommonStockRepurchaseProgram" xlink:href="algn-20150331.xsd#CommonStockRepurchaseProgram" xlink:type="simple" />
  <roleRef roleURI="http://www.aligntech.com/role/CommonStockRepurchaseProgramAdditionalInformationDetails" xlink:href="algn-20150331.xsd#CommonStockRepurchaseProgramAdditionalInformationDetails" xlink:type="simple" />
  <roleRef roleURI="http://www.aligntech.com/role/ComputationOfBasicAndDilutedNetProfitPerShareAttributableToCommonStockDetails" xlink:href="algn-20150331.xsd#ComputationOfBasicAndDilutedNetProfitPerShareAttributableToCommonStockDetails" xlink:type="simple" />
  <roleRef roleURI="http://www.aligntech.com/role/CondensedConsolidatedBalanceSheets" xlink:href="algn-20150331.xsd#CondensedConsolidatedBalanceSheets" xlink:type="simple" />
  <roleRef roleURI="http://www.aligntech.com/role/CondensedConsolidatedBalanceSheetsParenthetical" xlink:href="algn-20150331.xsd#CondensedConsolidatedBalanceSheetsParenthetical" xlink:type="simple" />
  <roleRef roleURI="http://www.aligntech.com/role/CondensedConsolidatedStatementsOfCashFlows" xlink:href="algn-20150331.xsd#CondensedConsolidatedStatementsOfCashFlows" xlink:type="simple" />
  <roleRef roleURI="http://www.aligntech.com/role/CondensedConsolidatedStatementsOfComprehensiveIncome" xlink:href="algn-20150331.xsd#CondensedConsolidatedStatementsOfComprehensiveIncome" xlink:type="simple" />
  <roleRef roleURI="http://www.aligntech.com/role/CondensedConsolidatedStatementsOfOperations" xlink:href="algn-20150331.xsd#CondensedConsolidatedStatementsOfOperations" xlink:type="simple" />
  <roleRef roleURI="http://www.aligntech.com/role/CreditFacilities" xlink:href="algn-20150331.xsd#CreditFacilities" xlink:type="simple" />
  <roleRef roleURI="http://www.aligntech.com/role/CreditFacilitiesAdditionalInformationDetails" xlink:href="algn-20150331.xsd#CreditFacilitiesAdditionalInformationDetails" xlink:type="simple" />
  <roleRef roleURI="http://www.aligntech.com/role/DocumentAndEntityInformation" xlink:href="algn-20150331.xsd#DocumentAndEntityInformation" xlink:type="simple" />
  <roleRef roleURI="http://www.aligntech.com/role/GoodwillAndLongLivedAssets" xlink:href="algn-20150331.xsd#GoodwillAndLongLivedAssets" xlink:type="simple" />
  <roleRef roleURI="http://www.aligntech.com/role/GoodwillAndLongLivedAssetsImpairmentOfGoodwillDetails" xlink:href="algn-20150331.xsd#GoodwillAndLongLivedAssetsImpairmentOfGoodwillDetails" xlink:type="simple" />
  <roleRef roleURI="http://www.aligntech.com/role/GoodwillAndLongLivedAssetsNarrativeDetails" xlink:href="algn-20150331.xsd#GoodwillAndLongLivedAssetsNarrativeDetails" xlink:type="simple" />
  <roleRef roleURI="http://www.aligntech.com/role/GoodwillAndLongLivedAssetsTables" xlink:href="algn-20150331.xsd#GoodwillAndLongLivedAssetsTables" xlink:type="simple" />
  <roleRef roleURI="http://www.aligntech.com/role/IntangibleAssetsAsDirectResultFromCadentAcquisitionDetails" xlink:href="algn-20150331.xsd#IntangibleAssetsAsDirectResultFromCadentAcquisitionDetails" xlink:type="simple" />
  <roleRef roleURI="http://www.aligntech.com/role/InventoriesDetails" xlink:href="algn-20150331.xsd#InventoriesDetails" xlink:type="simple" />
  <roleRef roleURI="http://www.aligntech.com/role/LegalProceedingsNotes" xlink:href="algn-20150331.xsd#LegalProceedingsNotes" xlink:type="simple" />
  <roleRef roleURI="http://www.aligntech.com/role/LongLivedAssetsByGeographicAreaDetails" xlink:href="algn-20150331.xsd#LongLivedAssetsByGeographicAreaDetails" xlink:type="simple" />
  <roleRef roleURI="http://www.aligntech.com/role/MarketableSecuritiesAndFairValueMeasurements" xlink:href="algn-20150331.xsd#MarketableSecuritiesAndFairValueMeasurements" xlink:type="simple" />
  <roleRef roleURI="http://www.aligntech.com/role/MarketableSecuritiesAndFairValueMeasurementsAdditionalInformationDetails" xlink:href="algn-20150331.xsd#MarketableSecuritiesAndFairValueMeasurementsAdditionalInformationDetails" xlink:type="simple" />
  <roleRef roleURI="http://www.aligntech.com/role/MarketableSecuritiesAndFairValueMeasurementsAvailableForSaleSecuritiesDetails" xlink:href="algn-20150331.xsd#MarketableSecuritiesAndFairValueMeasurementsAvailableForSaleSecuritiesDetails" xlink:type="simple" />
  <roleRef roleURI="http://www.aligntech.com/role/MarketableSecuritiesAndFairValueMeasurementsTables" xlink:href="algn-20150331.xsd#MarketableSecuritiesAndFairValueMeasurementsTables" xlink:type="simple" />
  <roleRef roleURI="http://www.aligntech.com/role/MinimumFutureLeasePaymentsForNonCancelableLeasesDetails" xlink:href="algn-20150331.xsd#MinimumFutureLeasePaymentsForNonCancelableLeasesDetails" xlink:type="simple" />
  <roleRef roleURI="http://www.aligntech.com/role/NetProfitPerShare" xlink:href="algn-20150331.xsd#NetProfitPerShare" xlink:type="simple" />
  <roleRef roleURI="http://www.aligntech.com/role/NetProfitPerShareTables" xlink:href="algn-20150331.xsd#NetProfitPerShareTables" xlink:type="simple" />
  <roleRef roleURI="http://www.aligntech.com/role/NetRevenuesByGeographicAreaDetails" xlink:href="algn-20150331.xsd#NetRevenuesByGeographicAreaDetails" xlink:type="simple" />
  <roleRef roleURI="http://www.aligntech.com/role/SegmentInformationDetails" xlink:href="algn-20150331.xsd#SegmentInformationDetails" xlink:type="simple" />
  <roleRef roleURI="http://www.aligntech.com/role/SegmentsAndGeographicalInformation" xlink:href="algn-20150331.xsd#SegmentsAndGeographicalInformation" xlink:type="simple" />
  <roleRef roleURI="http://www.aligntech.com/role/SegmentsAndGeographicalInformationAdditionalInformationDetails" xlink:href="algn-20150331.xsd#SegmentsAndGeographicalInformationAdditionalInformationDetails" xlink:type="simple" />
  <roleRef roleURI="http://www.aligntech.com/role/SegmentsAndGeographicalInformationTables" xlink:href="algn-20150331.xsd#SegmentsAndGeographicalInformationTables" xlink:type="simple" />
  <roleRef roleURI="http://www.aligntech.com/role/ShortTermAndLongTermMarketableSecuritiesDetails" xlink:href="algn-20150331.xsd#ShortTermAndLongTermMarketableSecuritiesDetails" xlink:type="simple" />
  <roleRef roleURI="http://www.aligntech.com/role/StockBasedCompensation" xlink:href="algn-20150331.xsd#StockBasedCompensation" xlink:type="simple" />
  <roleRef roleURI="http://www.aligntech.com/role/StockBasedCompensationAdditionalInformationDetails" xlink:href="algn-20150331.xsd#StockBasedCompensationAdditionalInformationDetails" xlink:type="simple" />
  <roleRef roleURI="http://www.aligntech.com/role/StockBasedCompensationExpenseRelatedToAllStockBasedAwardsAndEmployeeStockPurchasesDetails" xlink:href="algn-20150331.xsd#StockBasedCompensationExpenseRelatedToAllStockBasedAwardsAndEmployeeStockPurchasesDetails" xlink:type="simple" />
  <roleRef roleURI="http://www.aligntech.com/role/StockBasedCompensationStockBasedCompensationEmployeeStockPurchasePlanDetails" xlink:href="algn-20150331.xsd#StockBasedCompensationStockBasedCompensationEmployeeStockPurchasePlanDetails" xlink:type="simple" />
  <roleRef roleURI="http://www.aligntech.com/role/StockBasedCompensationTables" xlink:href="algn-20150331.xsd#StockBasedCompensationTables" xlink:type="simple" />
  <roleRef roleURI="http://www.aligntech.com/role/SummaryOfFinancialAssetsMeasuredAtFairValueOnRecurringBasisDetails" xlink:href="algn-20150331.xsd#SummaryOfFinancialAssetsMeasuredAtFairValueOnRecurringBasisDetails" xlink:type="simple" />
  <roleRef roleURI="http://www.aligntech.com/role/SummaryOfMsuPerformanceDetails" xlink:href="algn-20150331.xsd#SummaryOfMsuPerformanceDetails" xlink:type="simple" />
  <roleRef roleURI="http://www.aligntech.com/role/SummaryOfNonvestedSharesDetails" xlink:href="algn-20150331.xsd#SummaryOfNonvestedSharesDetails" xlink:type="simple" />
  <roleRef roleURI="http://www.aligntech.com/role/SummaryOfSignificantAccountingPolicies" xlink:href="algn-20150331.xsd#SummaryOfSignificantAccountingPolicies" xlink:type="simple" />
  <roleRef roleURI="http://www.aligntech.com/role/SummaryOfSignificantAccountingPoliciesPolicies" xlink:href="algn-20150331.xsd#SummaryOfSignificantAccountingPoliciesPolicies" xlink:type="simple" />
  <roleRef roleURI="http://www.aligntech.com/role/TotalEstimatedAnnualFutureAmortizationExpenseForAcquiredIntangibleAssetsDetails" xlink:href="algn-20150331.xsd#TotalEstimatedAnnualFutureAmortizationExpenseForAcquiredIntangibleAssetsDetails" xlink:type="simple" />
  <roleRef roleURI="http://www.aligntech.com/role/WarrantyAccrualActivityDetails" xlink:href="algn-20150331.xsd#WarrantyAccrualActivityDetails" xlink:type="simple" />
  <roleRef roleURI="http://www.xbrl.org/2009/role/negatedLabel" xlink:href="http://www.xbrl.org/lrr/role/negated-2009-12-16.xsd#negatedLabel" xlink:type="simple" />
  <roleRef roleURI="http://www.xbrl.org/2009/role/negatedNetLabel" xlink:href="http://www.xbrl.org/lrr/role/negated-2009-12-16.xsd#negatedNetLabel" xlink:type="simple" />
  <roleRef roleURI="http://www.xbrl.org/2009/role/negatedPeriodEndLabel" xlink:href="http://www.xbrl.org/lrr/role/negated-2009-12-16.xsd#negatedPeriodEndLabel" xlink:type="simple" />
  <roleRef roleURI="http://www.xbrl.org/2009/role/negatedPeriodStartLabel" xlink:href="http://www.xbrl.org/lrr/role/negated-2009-12-16.xsd#negatedPeriodStartLabel" xlink:type="simple" />
  <roleRef roleURI="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:href="http://www.xbrl.org/lrr/role/negated-2009-12-16.xsd#negatedTerseLabel" xlink:type="simple" />
  <roleRef roleURI="http://www.xbrl.org/2009/role/negatedTotalLabel" xlink:href="http://www.xbrl.org/lrr/role/negated-2009-12-16.xsd#negatedTotalLabel" xlink:type="simple" />
  <roleRef roleURI="http://www.xbrl.org/2009/role/netLabel" xlink:href="http://www.xbrl.org/lrr/role/net-2009-12-16.xsd#netLabel" xlink:type="simple" />
  <presentationLink xlink:role="http://www.aligntech.com/role/AccountingForIncomeTaxes" xlink:type="extended">
    <loc xlink:href="algn-20150331.xsd#algn_NotesToFinancialStatementsAbstract" xlink:label="loc_algn_NotesToFinancialStatementsAbstract_6666C0870E8A192DABDA6B6F60E0D15A" xlink:type="locator" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_StatementTable" xlink:label="loc_us-gaap_StatementTable_045B12DE55EE7B50EF9C6B6F60E1AE26" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_algn_NotesToFinancialStatementsAbstract_6666C0870E8A192DABDA6B6F60E0D15A" xlink:to="loc_us-gaap_StatementTable_045B12DE55EE7B50EF9C6B6F60E1AE26" xlink:type="arc" />
    <loc xlink:href="http://xbrl.sec.gov/dei/2014/dei-2014-01-31.xsd#dei_LegalEntityAxis" xlink:label="loc_dei_LegalEntityAxis_056279146073BD78E6376B6F60E1259E" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_StatementTable_045B12DE55EE7B50EF9C6B6F60E1AE26" xlink:to="loc_dei_LegalEntityAxis_056279146073BD78E6376B6F60E1259E" xlink:type="arc" />
    <loc xlink:href="http://xbrl.sec.gov/dei/2014/dei-2014-01-31.xsd#dei_EntityDomain" xlink:label="loc_dei_EntityDomain_0990B320432E4FFA97CA6B6F60E1362E" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_LegalEntityAxis_056279146073BD78E6376B6F60E1259E" xlink:to="loc_dei_EntityDomain_0990B320432E4FFA97CA6B6F60E1362E" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_StatementLineItems" xlink:label="loc_us-gaap_StatementLineItems_15F427D2C6F243B3B8696B6F60E1E25C" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_StatementTable_045B12DE55EE7B50EF9C6B6F60E1AE26" xlink:to="loc_us-gaap_StatementLineItems_15F427D2C6F243B3B8696B6F60E1E25C" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_IncomeTaxDisclosureTextBlock" xlink:label="loc_us-gaap_IncomeTaxDisclosureTextBlock_F95289E1BB11D546204C6B6F60E1C7A5" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_StatementLineItems_15F427D2C6F243B3B8696B6F60E1E25C" xlink:to="loc_us-gaap_IncomeTaxDisclosureTextBlock_F95289E1BB11D546204C6B6F60E1C7A5" xlink:type="arc" />
  </presentationLink>
  <presentationLink xlink:role="http://www.aligntech.com/role/AccountingForIncomeTaxesAdditionalInformationDetails" xlink:type="extended">
    <loc xlink:href="algn-20150331.xsd#algn_DisclosureAccountingForIncomeTaxesAdditionalInformationAbstract" xlink:label="loc_algn_DisclosureAccountingForIncomeTaxesAdditionalInformationAbstract_F526DD18BB605B834DEAFD35E07AA86E" xlink:type="locator" />
    <loc xlink:href="algn-20150331.xsd#algn_IncomeTaxesTable" xlink:label="loc_algn_IncomeTaxesTable_B00812EE5204207348B7FD35E07AEF83" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_algn_DisclosureAccountingForIncomeTaxesAdditionalInformationAbstract_F526DD18BB605B834DEAFD35E07AA86E" xlink:to="loc_algn_IncomeTaxesTable_B00812EE5204207348B7FD35E07AEF83" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_IncomeTaxAuthorityAxis" xlink:label="loc_us-gaap_IncomeTaxAuthorityAxis_BFFFA29B94BCB740838FFD35E07AA942" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_algn_IncomeTaxesTable_B00812EE5204207348B7FD35E07AEF83" xlink:to="loc_us-gaap_IncomeTaxAuthorityAxis_BFFFA29B94BCB740838FFD35E07AA942" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_IncomeTaxAuthorityDomain" xlink:label="loc_us-gaap_IncomeTaxAuthorityDomain_75469AF7F69BF2B37825FD35E07A853B" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_IncomeTaxAuthorityAxis_BFFFA29B94BCB740838FFD35E07AA942" xlink:to="loc_us-gaap_IncomeTaxAuthorityDomain_75469AF7F69BF2B37825FD35E07A853B" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_ForeignCountryMember" xlink:label="loc_us-gaap_ForeignCountryMember_B4746AC842D4E8C7D173FD35E07ABF7B" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_IncomeTaxAuthorityDomain_75469AF7F69BF2B37825FD35E07A853B" xlink:to="loc_us-gaap_ForeignCountryMember_B4746AC842D4E8C7D173FD35E07ABF7B" xlink:type="arc" />
    <loc xlink:href="algn-20150331.xsd#algn_IncomeTaxesLineItems" xlink:label="loc_algn_IncomeTaxesLineItems_E0434FC927E8A4A284F6FD35E07A4882" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_algn_IncomeTaxesTable_B00812EE5204207348B7FD35E07AEF83" xlink:to="loc_algn_IncomeTaxesLineItems_E0434FC927E8A4A284F6FD35E07A4882" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_IncomeTaxExpenseBenefit" xlink:label="loc_us-gaap_IncomeTaxExpenseBenefit_8002E3010AA45F08F4A0FD35E07AA6C6" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_algn_IncomeTaxesLineItems_E0434FC927E8A4A284F6FD35E07A4882" xlink:to="loc_us-gaap_IncomeTaxExpenseBenefit_8002E3010AA45F08F4A0FD35E07AA6C6" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_EffectiveIncomeTaxRateContinuingOperations" xlink:label="loc_us-gaap_EffectiveIncomeTaxRateContinuingOperations_5923B752C530F9C577DDFD35E07AEAC6" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_algn_IncomeTaxesLineItems_E0434FC927E8A4A284F6FD35E07A4882" xlink:to="loc_us-gaap_EffectiveIncomeTaxRateContinuingOperations_5923B752C530F9C577DDFD35E07AEAC6" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate" xlink:label="loc_us-gaap_EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate_312D0125050C72909585FD366B94EDDE" xlink:type="locator" />
    <presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_algn_IncomeTaxesLineItems_E0434FC927E8A4A284F6FD35E07A4882" xlink:to="loc_us-gaap_EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate_312D0125050C72909585FD366B94EDDE" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_DeferredTaxAssetsValuationAllowance" xlink:label="loc_us-gaap_DeferredTaxAssetsValuationAllowance_D2E0F7697F920C90C687FD35E07A17EE" xlink:type="locator" />
    <presentationArc order="4" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_algn_IncomeTaxesLineItems_E0434FC927E8A4A284F6FD35E07A4882" xlink:to="loc_us-gaap_DeferredTaxAssetsValuationAllowance_D2E0F7697F920C90C687FD35E07A17EE" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_UnrecognizedTaxBenefits" xlink:label="loc_us-gaap_UnrecognizedTaxBenefits_122733D43BDAEF685E69FD35E07AC53B" xlink:type="locator" />
    <presentationArc order="5" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_algn_IncomeTaxesLineItems_E0434FC927E8A4A284F6FD35E07A4882" xlink:to="loc_us-gaap_UnrecognizedTaxBenefits_122733D43BDAEF685E69FD35E07AC53B" xlink:type="arc" />
    <loc xlink:href="algn-20150331.xsd#algn_EffectiveIncomeTaxReconciliationatForeignIncomeTaxRate" xlink:label="loc_algn_EffectiveIncomeTaxReconciliationatForeignIncomeTaxRate_597EFDA49F8853BA5CD2FD35E07AB3C0" xlink:type="locator" />
    <presentationArc order="6" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_algn_IncomeTaxesLineItems_E0434FC927E8A4A284F6FD35E07A4882" xlink:to="loc_algn_EffectiveIncomeTaxReconciliationatForeignIncomeTaxRate_597EFDA49F8853BA5CD2FD35E07AB3C0" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_IncomeTaxReconciliationTaxHolidays" xlink:label="loc_us-gaap_IncomeTaxReconciliationTaxHolidays_B2F17804F5B6FE1171A9FD35E07A2BF7" xlink:type="locator" />
    <presentationArc order="7" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_algn_IncomeTaxesLineItems_E0434FC927E8A4A284F6FD35E07A4882" xlink:to="loc_us-gaap_IncomeTaxReconciliationTaxHolidays_B2F17804F5B6FE1171A9FD35E07A2BF7" xlink:type="arc" />
    <loc xlink:href="algn-20150331.xsd#algn_EffectiveIncomeTaxRateReconciliationTaxHolidayEffectonDilutedEarningsPerShare" xlink:label="loc_algn_EffectiveIncomeTaxRateReconciliationTaxHolidayEffectonDilutedEarningsPerShare_8F933D3BC2CD21052D19FD35E07AE8C0" xlink:type="locator" />
    <presentationArc order="8" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_algn_IncomeTaxesLineItems_E0434FC927E8A4A284F6FD35E07A4882" xlink:to="loc_algn_EffectiveIncomeTaxRateReconciliationTaxHolidayEffectonDilutedEarningsPerShare_8F933D3BC2CD21052D19FD35E07AE8C0" xlink:type="arc" />
  </presentationLink>
  <presentationLink xlink:role="http://www.aligntech.com/role/AccruedLiabilitiesDetails" xlink:type="extended">
    <loc xlink:href="algn-20150331.xsd#algn_DisclosureAccruedLiabilitiesAbstract" xlink:label="loc_algn_DisclosureAccruedLiabilitiesAbstract_8FA51A12236474206D5B6B6F61940F39" xlink:type="locator" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_EmployeeRelatedLiabilitiesCurrent" xlink:label="loc_us-gaap_EmployeeRelatedLiabilitiesCurrent_8340B5685788C64C7BC56B6F6194B94D" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_algn_DisclosureAccruedLiabilitiesAbstract_8FA51A12236474206D5B6B6F61940F39" xlink:to="loc_us-gaap_EmployeeRelatedLiabilitiesCurrent_8340B5685788C64C7BC56B6F6194B94D" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_AccruedMarketingCostsCurrent" xlink:label="loc_us-gaap_AccruedMarketingCostsCurrent_EF71EB13948595F89D156B6F6195C127" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_algn_DisclosureAccruedLiabilitiesAbstract_8FA51A12236474206D5B6B6F61940F39" xlink:to="loc_us-gaap_AccruedMarketingCostsCurrent_EF71EB13948595F89D156B6F6195C127" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_SalesAndExciseTaxPayableCurrent" xlink:label="loc_us-gaap_SalesAndExciseTaxPayableCurrent_81491C03175A87508C096B6F6195D421" xlink:type="locator" />
    <presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_algn_DisclosureAccruedLiabilitiesAbstract_8FA51A12236474206D5B6B6F61940F39" xlink:to="loc_us-gaap_SalesAndExciseTaxPayableCurrent_81491C03175A87508C096B6F6195D421" xlink:type="arc" />
    <loc xlink:href="algn-20150331.xsd#algn_AccruedSalesAndMarketingCurrent" xlink:label="loc_algn_AccruedSalesAndMarketingCurrent_865EDE33674C58167C0B6B6F6195B35E" xlink:type="locator" />
    <presentationArc order="4" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_algn_DisclosureAccruedLiabilitiesAbstract_8FA51A12236474206D5B6B6F61940F39" xlink:to="loc_algn_AccruedSalesAndMarketingCurrent_865EDE33674C58167C0B6B6F6195B35E" xlink:type="arc" />
    <loc xlink:href="algn-20150331.xsd#algn_AccruedAccountsPayable" xlink:label="loc_algn_AccruedAccountsPayable_F17D1AA6C427C734BD906B6F61955AC9" xlink:type="locator" />
    <presentationArc order="5" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_algn_DisclosureAccruedLiabilitiesAbstract_8FA51A12236474206D5B6B6F61940F39" xlink:to="loc_algn_AccruedAccountsPayable_F17D1AA6C427C734BD906B6F61955AC9" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_StandardProductWarrantyAccrualCurrent" xlink:label="loc_us-gaap_StandardProductWarrantyAccrualCurrent_2E9E71B8E81B43D7FC086B6F61952895" xlink:type="locator" />
    <presentationArc order="6" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_algn_DisclosureAccruedLiabilitiesAbstract_8FA51A12236474206D5B6B6F61940F39" xlink:to="loc_us-gaap_StandardProductWarrantyAccrualCurrent_2E9E71B8E81B43D7FC086B6F61952895" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_AccruedProfessionalFeesCurrent" xlink:label="loc_us-gaap_AccruedProfessionalFeesCurrent_D1919C4572FCFABE617D6B6F6195F0EA" xlink:type="locator" />
    <presentationArc order="7" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_algn_DisclosureAccruedLiabilitiesAbstract_8FA51A12236474206D5B6B6F61940F39" xlink:to="loc_us-gaap_AccruedProfessionalFeesCurrent_D1919C4572FCFABE617D6B6F6195F0EA" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_AccruedIncomeTaxesCurrent" xlink:label="loc_us-gaap_AccruedIncomeTaxesCurrent_517882325C4FE39B63336B6F6195F44A" xlink:type="locator" />
    <presentationArc order="8" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_algn_DisclosureAccruedLiabilitiesAbstract_8FA51A12236474206D5B6B6F61940F39" xlink:to="loc_us-gaap_AccruedIncomeTaxesCurrent_517882325C4FE39B63336B6F6195F44A" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_OtherAccruedLiabilitiesCurrent" xlink:label="loc_us-gaap_OtherAccruedLiabilitiesCurrent_6C44A939223B36459D636B6F6195E6EC" xlink:type="locator" />
    <presentationArc order="9" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_algn_DisclosureAccruedLiabilitiesAbstract_8FA51A12236474206D5B6B6F61940F39" xlink:to="loc_us-gaap_OtherAccruedLiabilitiesCurrent_6C44A939223B36459D636B6F6195E6EC" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_AccruedLiabilitiesCurrent" xlink:label="loc_us-gaap_AccruedLiabilitiesCurrent_E6EB76C969EC02184B746B6F6195C38F" xlink:type="locator" />
    <presentationArc order="10" preferredLabel="http://www.xbrl.org/2003/role/totalLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_algn_DisclosureAccruedLiabilitiesAbstract_8FA51A12236474206D5B6B6F61940F39" xlink:to="loc_us-gaap_AccruedLiabilitiesCurrent_E6EB76C969EC02184B746B6F6195C38F" xlink:type="arc" />
  </presentationLink>
  <presentationLink xlink:role="http://www.aligntech.com/role/ActivityUnderStockOptionPlansDetails" xlink:type="extended">
    <loc xlink:href="algn-20150331.xsd#algn_DisclosureActivityUnderStockOptionPlansAbstract" xlink:label="loc_algn_DisclosureActivityUnderStockOptionPlansAbstract_9EC901AF292DCB601048E73DFB1A52A4" xlink:type="locator" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable" xlink:label="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_840CA959456D336AE6CEE73DFB1A34A7" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_algn_DisclosureActivityUnderStockOptionPlansAbstract_9EC901AF292DCB601048E73DFB1A52A4" xlink:to="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_840CA959456D336AE6CEE73DFB1A34A7" xlink:type="arc" />
    <loc xlink:href="http://xbrl.sec.gov/dei/2014/dei-2014-01-31.xsd#dei_LegalEntityAxis" xlink:label="loc_dei_LegalEntityAxis_D5431AE1E07A139D4E56E73DFB1BCE72" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_840CA959456D336AE6CEE73DFB1A34A7" xlink:to="loc_dei_LegalEntityAxis_D5431AE1E07A139D4E56E73DFB1BCE72" xlink:type="arc" />
    <loc xlink:href="http://xbrl.sec.gov/dei/2014/dei-2014-01-31.xsd#dei_EntityDomain" xlink:label="loc_dei_EntityDomain_D7FECD5184E30D9F4E30E73DFB1B5B1B" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_LegalEntityAxis_D5431AE1E07A139D4E56E73DFB1BCE72" xlink:to="loc_dei_EntityDomain_D7FECD5184E30D9F4E30E73DFB1B5B1B" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_DAC8CBC9D92BC02F2456E73DFB1B5665" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_840CA959456D336AE6CEE73DFB1A34A7" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_DAC8CBC9D92BC02F2456E73DFB1B5665" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingRollForward" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingRollForward_1A872630E45798720715E73DFB1B66A8" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_DAC8CBC9D92BC02F2456E73DFB1B5665" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingRollForward_1A872630E45798720715E73DFB1B66A8" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber_596F1C3732D3AA0AB52DE73DFB1BB40A" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/periodStartLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingRollForward_1A872630E45798720715E73DFB1B66A8" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber_596F1C3732D3AA0AB52DE73DFB1BB40A" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross_7E1CD18DF5253C3D5C57E73DFB1B32FF" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingRollForward_1A872630E45798720715E73DFB1B66A8" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross_7E1CD18DF5253C3D5C57E73DFB1B32FF" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePrice" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePrice_2B9C51FEE0127FEB400DE73ECBC0A2BB" xlink:type="locator" />
    <presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingRollForward_1A872630E45798720715E73DFB1B66A8" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePrice_2B9C51FEE0127FEB400DE73ECBC0A2BB" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised" xlink:label="loc_us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised_77B483290AD0AF359557E73DFB1B1146" xlink:type="locator" />
    <presentationArc order="4" preferredLabel="http://www.xbrl.org/2009/role/negatedLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingRollForward_1A872630E45798720715E73DFB1B66A8" xlink:to="loc_us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised_77B483290AD0AF359557E73DFB1B1146" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresAndExpirationsInPeriod" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresAndExpirationsInPeriod_B3F3668F1EADB14404BDE73DFB1BE655" xlink:type="locator" />
    <presentationArc order="5" preferredLabel="http://www.xbrl.org/2009/role/negatedLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingRollForward_1A872630E45798720715E73DFB1B66A8" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresAndExpirationsInPeriod_B3F3668F1EADB14404BDE73DFB1BE655" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber_94381065CCA6A4660681E73DFB1B3ABB" xlink:type="locator" />
    <presentationArc order="6" preferredLabel="http://www.xbrl.org/2003/role/periodEndLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingRollForward_1A872630E45798720715E73DFB1B66A8" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber_94381065CCA6A4660681E73DFB1B3ABB" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingNumber" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingNumber_5397918331A8FF2350FCE73DFB1BE84D" xlink:type="locator" />
    <presentationArc order="7" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingRollForward_1A872630E45798720715E73DFB1B66A8" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingNumber_5397918331A8FF2350FCE73DFB1BE84D" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableNumber" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableNumber_DC5332CE952C58DBFFF5E73DFB1B620A" xlink:type="locator" />
    <presentationArc order="8" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingRollForward_1A872630E45798720715E73DFB1B66A8" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableNumber_DC5332CE952C58DBFFF5E73DFB1B620A" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePriceRollforward" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePriceRollforward_8EFCC7D01029A72D0FA0E73DFB1BB9F6" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_DAC8CBC9D92BC02F2456E73DFB1B5665" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePriceRollforward_8EFCC7D01029A72D0FA0E73DFB1BB9F6" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice_0E4DCF1AE6B04390B280E73DFB1C37FC" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/periodStartLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePriceRollforward_8EFCC7D01029A72D0FA0E73DFB1BB9F6" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice_0E4DCF1AE6B04390B280E73DFB1C37FC" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice_AF8624F32B135D9767B7E73DFB1CC385" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePriceRollforward_8EFCC7D01029A72D0FA0E73DFB1BB9F6" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice_AF8624F32B135D9767B7E73DFB1CC385" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresAndExpirationsInPeriodWeightedAverageExercisePrice" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresAndExpirationsInPeriodWeightedAverageExercisePrice_75317C78564A65AD194BE73DFB1CE4DB" xlink:type="locator" />
    <presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePriceRollforward_8EFCC7D01029A72D0FA0E73DFB1BB9F6" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresAndExpirationsInPeriodWeightedAverageExercisePrice_75317C78564A65AD194BE73DFB1CE4DB" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice_C8CAD5CB9A829329D730E73DFB1C49ED" xlink:type="locator" />
    <presentationArc order="4" preferredLabel="http://www.xbrl.org/2003/role/periodEndLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePriceRollforward_8EFCC7D01029A72D0FA0E73DFB1BB9F6" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice_C8CAD5CB9A829329D730E73DFB1C49ED" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingWeightedAverageExercisePrice" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingWeightedAverageExercisePrice_0D6908309D20F045BA88E73DFB1C3497" xlink:type="locator" />
    <presentationArc order="5" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePriceRollforward_8EFCC7D01029A72D0FA0E73DFB1BB9F6" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingWeightedAverageExercisePrice_0D6908309D20F045BA88E73DFB1C3497" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageExercisePrice" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageExercisePrice_35A5CBDCACAFD82140A0E73DFB1C4536" xlink:type="locator" />
    <presentationArc order="6" preferredLabel="http://www.xbrl.org/2003/role/periodEndLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePriceRollforward_8EFCC7D01029A72D0FA0E73DFB1BB9F6" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageExercisePrice_35A5CBDCACAFD82140A0E73DFB1C4536" xlink:type="arc" />
    <loc xlink:href="algn-20150331.xsd#algn_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsWeightedAverageRemainingContractualTermAbstract" xlink:label="loc_algn_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsWeightedAverageRemainingContractualTermAbstract_7E2112E586BAD92C85C3E73DFB1C4852" xlink:type="locator" />
    <presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_DAC8CBC9D92BC02F2456E73DFB1B5665" xlink:to="loc_algn_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsWeightedAverageRemainingContractualTermAbstract_7E2112E586BAD92C85C3E73DFB1C4852" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsOutstandingWeightedAverageRemainingContractualTerm2" xlink:label="loc_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsOutstandingWeightedAverageRemainingContractualTerm2_0F85ECBE6FC5FB18B661E73DFB1C1C26" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/periodEndLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_algn_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsWeightedAverageRemainingContractualTermAbstract_7E2112E586BAD92C85C3E73DFB1C4852" xlink:to="loc_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsOutstandingWeightedAverageRemainingContractualTerm2_0F85ECBE6FC5FB18B661E73DFB1C1C26" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingWeightedAverageRemainingContractualTerm1" xlink:label="loc_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingWeightedAverageRemainingContractualTerm1_5ED3FFAEA2B229B39014E73DFB1CB144" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_algn_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsWeightedAverageRemainingContractualTermAbstract_7E2112E586BAD92C85C3E73DFB1C4852" xlink:to="loc_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingWeightedAverageRemainingContractualTerm1_5ED3FFAEA2B229B39014E73DFB1CB144" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableWeightedAverageRemainingContractualTerm1" xlink:label="loc_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableWeightedAverageRemainingContractualTerm1_8FD089BD444C74C2E0EAE73DFB1CFBA8" xlink:type="locator" />
    <presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_algn_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsWeightedAverageRemainingContractualTermAbstract_7E2112E586BAD92C85C3E73DFB1C4852" xlink:to="loc_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableWeightedAverageRemainingContractualTerm1_8FD089BD444C74C2E0EAE73DFB1CFBA8" xlink:type="arc" />
    <loc xlink:href="algn-20150331.xsd#algn_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsAggregateIntrinsicValueAbstract" xlink:label="loc_algn_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsAggregateIntrinsicValueAbstract_C15D7A0A6BFD79E0BE4CE73DFB1C50D1" xlink:type="locator" />
    <presentationArc order="4" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_DAC8CBC9D92BC02F2456E73DFB1B5665" xlink:to="loc_algn_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsAggregateIntrinsicValueAbstract_C15D7A0A6BFD79E0BE4CE73DFB1C50D1" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue_11E63D6AAAE0F949AAA4E73DFB1CF63A" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/periodEndLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_algn_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsAggregateIntrinsicValueAbstract_C15D7A0A6BFD79E0BE4CE73DFB1C50D1" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue_11E63D6AAAE0F949AAA4E73DFB1CF63A" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingAggregateIntrinsicValue" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingAggregateIntrinsicValue_210CE9A54395029FB690E73DFB1C740A" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_algn_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsAggregateIntrinsicValueAbstract_C15D7A0A6BFD79E0BE4CE73DFB1C50D1" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingAggregateIntrinsicValue_210CE9A54395029FB690E73DFB1C740A" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableIntrinsicValue1" xlink:label="loc_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableIntrinsicValue1_C377544D55E06564F22BE73DFB1D77F8" xlink:type="locator" />
    <presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_algn_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsAggregateIntrinsicValueAbstract_C15D7A0A6BFD79E0BE4CE73DFB1C50D1" xlink:to="loc_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableIntrinsicValue1_C377544D55E06564F22BE73DFB1D77F8" xlink:type="arc" />
  </presentationLink>
  <presentationLink xlink:role="http://www.aligntech.com/role/BalanceSheetComponents" xlink:type="extended">
    <loc xlink:href="algn-20150331.xsd#algn_NotesToFinancialStatementsAbstract" xlink:label="loc_algn_NotesToFinancialStatementsAbstract_C8B5235267F9C1BC8E9F6B6F60E961BE" xlink:type="locator" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_SupplementalBalanceSheetDisclosuresTextBlock" xlink:label="loc_us-gaap_SupplementalBalanceSheetDisclosuresTextBlock_FA6C80EE407C5ABC2F8B6B6F60E9829F" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_algn_NotesToFinancialStatementsAbstract_C8B5235267F9C1BC8E9F6B6F60E961BE" xlink:to="loc_us-gaap_SupplementalBalanceSheetDisclosuresTextBlock_FA6C80EE407C5ABC2F8B6B6F60E9829F" xlink:type="arc" />
  </presentationLink>
  <presentationLink xlink:role="http://www.aligntech.com/role/BalanceSheetComponentsAdditionalInformationDetails" xlink:type="extended">
    <loc xlink:href="algn-20150331.xsd#algn_DisclosureBalanceSheetComponentsAdditionalInformationAbstract" xlink:label="loc_algn_DisclosureBalanceSheetComponentsAdditionalInformationAbstract_54A3162826B1F9A0D37B6B6F61323F2A" xlink:type="locator" />
    <loc xlink:href="algn-20150331.xsd#algn_StandardProductWarrantyTimePeriod" xlink:label="loc_algn_StandardProductWarrantyTimePeriod_418D8300705BE85E0BDE6B6F6132FAA5" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_algn_DisclosureBalanceSheetComponentsAdditionalInformationAbstract_54A3162826B1F9A0D37B6B6F61323F2A" xlink:to="loc_algn_StandardProductWarrantyTimePeriod_418D8300705BE85E0BDE6B6F6132FAA5" xlink:type="arc" />
  </presentationLink>
  <presentationLink xlink:role="http://www.aligntech.com/role/BalanceSheetComponentsTables" xlink:type="extended">
    <loc xlink:href="algn-20150331.xsd#algn_NotesToFinancialStatementsAbstract" xlink:label="loc_algn_NotesToFinancialStatementsAbstract_4AAA7F6C8914C502A6F86B6F60ED3FED" xlink:type="locator" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_ScheduleOfInventoryCurrentTableTextBlock" xlink:label="loc_us-gaap_ScheduleOfInventoryCurrentTableTextBlock_2899EAD5A2BBF55F15136B6F60ED908A" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_algn_NotesToFinancialStatementsAbstract_4AAA7F6C8914C502A6F86B6F60ED3FED" xlink:to="loc_us-gaap_ScheduleOfInventoryCurrentTableTextBlock_2899EAD5A2BBF55F15136B6F60ED908A" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_ScheduleOfAccruedLiabilitiesTableTextBlock" xlink:label="loc_us-gaap_ScheduleOfAccruedLiabilitiesTableTextBlock_6F69AF1C73AFE9FF29FE6B6F60ED96E6" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_algn_NotesToFinancialStatementsAbstract_4AAA7F6C8914C502A6F86B6F60ED3FED" xlink:to="loc_us-gaap_ScheduleOfAccruedLiabilitiesTableTextBlock_6F69AF1C73AFE9FF29FE6B6F60ED96E6" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_ScheduleOfProductWarrantyLiabilityTableTextBlock" xlink:label="loc_us-gaap_ScheduleOfProductWarrantyLiabilityTableTextBlock_6B34DC532152EC1082B36B6F60ED1F2A" xlink:type="locator" />
    <presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_algn_NotesToFinancialStatementsAbstract_4AAA7F6C8914C502A6F86B6F60ED3FED" xlink:to="loc_us-gaap_ScheduleOfProductWarrantyLiabilityTableTextBlock_6B34DC532152EC1082B36B6F60ED1F2A" xlink:type="arc" />
  </presentationLink>
  <presentationLink xlink:role="http://www.aligntech.com/role/BusinessCombinationsDetails" xlink:type="extended">
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_BusinessCombinationsAbstract" xlink:label="loc_us-gaap_BusinessCombinationsAbstract_9FD200FE3CAF4F3FF895FBABA3AF73E3" xlink:type="locator" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable" xlink:label="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_600DCF47AE64963E5F74FBABA3AF2479" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_BusinessCombinationsAbstract_9FD200FE3CAF4F3FF895FBABA3AF73E3" xlink:to="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_600DCF47AE64963E5F74FBABA3AF2479" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_BusinessAcquisitionAxis" xlink:label="loc_us-gaap_BusinessAcquisitionAxis_359D33B17E512217BC3CFBABA3AFD74D" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_600DCF47AE64963E5F74FBABA3AF2479" xlink:to="loc_us-gaap_BusinessAcquisitionAxis_359D33B17E512217BC3CFBABA3AFD74D" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_BusinessAcquisitionAcquireeDomain" xlink:label="loc_us-gaap_BusinessAcquisitionAcquireeDomain_6A71908276D43307345FFBABA3AF149E" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_BusinessAcquisitionAxis_359D33B17E512217BC3CFBABA3AFD74D" xlink:to="loc_us-gaap_BusinessAcquisitionAcquireeDomain_6A71908276D43307345FFBABA3AF149E" xlink:type="arc" />
    <loc xlink:href="algn-20150331.xsd#algn_IcaHoldingsPtyLimitedMember" xlink:label="loc_algn_IcaHoldingsPtyLimitedMember_D50C9B12312F20CFFC4EFBABA3AF013F" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_BusinessAcquisitionAcquireeDomain_6A71908276D43307345FFBABA3AF149E" xlink:to="loc_algn_IcaHoldingsPtyLimitedMember_D50C9B12312F20CFFC4EFBABA3AF013F" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_BusinessAcquisitionLineItems" xlink:label="loc_us-gaap_BusinessAcquisitionLineItems_A4B68ADC9977E91EA8D8FBABA3AF5303" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_600DCF47AE64963E5F74FBABA3AF2479" xlink:to="loc_us-gaap_BusinessAcquisitionLineItems_A4B68ADC9977E91EA8D8FBABA3AF5303" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_Goodwill" xlink:label="loc_us-gaap_Goodwill_C885E5F4F731EC2B1247FBABA3B09F4D" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_A4B68ADC9977E91EA8D8FBABA3AF5303" xlink:to="loc_us-gaap_Goodwill_C885E5F4F731EC2B1247FBABA3B09F4D" xlink:type="arc" />
  </presentationLink>
  <presentationLink xlink:role="http://www.aligntech.com/role/BusinessCombinationsNotes" xlink:type="extended" />
  <presentationLink xlink:role="http://www.aligntech.com/role/ChangeInCarryingValueOfGoodwillDetails" xlink:type="extended">
    <loc xlink:href="algn-20150331.xsd#algn_DisclosureChangeInCarryingValueOfGoodwillAbstract" xlink:label="loc_algn_DisclosureChangeInCarryingValueOfGoodwillAbstract_6F12D43D3AD1C049378B6B71CCF7B396" xlink:type="locator" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_ScheduleOfGoodwillTable" xlink:label="loc_us-gaap_ScheduleOfGoodwillTable_1B37A82872BA64E4FDC86B71CCF72ED7" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_algn_DisclosureChangeInCarryingValueOfGoodwillAbstract_6F12D43D3AD1C049378B6B71CCF7B396" xlink:to="loc_us-gaap_ScheduleOfGoodwillTable_1B37A82872BA64E4FDC86B71CCF72ED7" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_StatementBusinessSegmentsAxis" xlink:label="loc_us-gaap_StatementBusinessSegmentsAxis_A6691B5707D5CE6801426B71CCF746BD" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ScheduleOfGoodwillTable_1B37A82872BA64E4FDC86B71CCF72ED7" xlink:to="loc_us-gaap_StatementBusinessSegmentsAxis_A6691B5707D5CE6801426B71CCF746BD" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_SegmentDomain" xlink:label="loc_us-gaap_SegmentDomain_E0BDC3B7E51A730BD3176B71CCF7C57E" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_A6691B5707D5CE6801426B71CCF746BD" xlink:to="loc_us-gaap_SegmentDomain_E0BDC3B7E51A730BD3176B71CCF7C57E" xlink:type="arc" />
    <loc xlink:href="algn-20150331.xsd#algn_ClearAlignerMember" xlink:label="loc_algn_ClearAlignerMember_2DA2C66E4146D346134A6B71CCF7729B" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_SegmentDomain_E0BDC3B7E51A730BD3176B71CCF7C57E" xlink:to="loc_algn_ClearAlignerMember_2DA2C66E4146D346134A6B71CCF7729B" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_GoodwillLineItems" xlink:label="loc_us-gaap_GoodwillLineItems_16573AA031A079214C286B71CCF7AC57" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ScheduleOfGoodwillTable_1B37A82872BA64E4FDC86B71CCF72ED7" xlink:to="loc_us-gaap_GoodwillLineItems_16573AA031A079214C286B71CCF7AC57" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_GoodwillRollForward" xlink:label="loc_us-gaap_GoodwillRollForward_44054ADEC22B311F1E516B71CCF7C5A3" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_GoodwillLineItems_16573AA031A079214C286B71CCF7AC57" xlink:to="loc_us-gaap_GoodwillRollForward_44054ADEC22B311F1E516B71CCF7C5A3" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_Goodwill" xlink:label="loc_us-gaap_Goodwill_B499BD23E3F2A8D08CA86B71CCF8A32C" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/periodStartLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_GoodwillRollForward_44054ADEC22B311F1E516B71CCF7C5A3" xlink:to="loc_us-gaap_Goodwill_B499BD23E3F2A8D08CA86B71CCF8A32C" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_GoodwillTranslationAndPurchaseAccountingAdjustments" xlink:label="loc_us-gaap_GoodwillTranslationAndPurchaseAccountingAdjustments_FE7238637DD2F6295EA66B71CCF87E8E" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_GoodwillRollForward_44054ADEC22B311F1E516B71CCF7C5A3" xlink:to="loc_us-gaap_GoodwillTranslationAndPurchaseAccountingAdjustments_FE7238637DD2F6295EA66B71CCF87E8E" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_Goodwill" xlink:label="loc_us-gaap_Goodwill_8C3A4ACB8C521E7E813A6B71CCF88C50" xlink:type="locator" />
    <presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/periodEndLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_GoodwillRollForward_44054ADEC22B311F1E516B71CCF7C5A3" xlink:to="loc_us-gaap_Goodwill_8C3A4ACB8C521E7E813A6B71CCF88C50" xlink:type="arc" />
  </presentationLink>
  <presentationLink xlink:role="http://www.aligntech.com/role/CommitmentsAndContingencies" xlink:type="extended">
    <loc xlink:href="algn-20150331.xsd#algn_NotesToFinancialStatementsAbstract" xlink:label="loc_algn_NotesToFinancialStatementsAbstract_BE019F110313C17EC2FB6B6F61F7B341" xlink:type="locator" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_CommitmentsAndContingenciesDisclosureTextBlock" xlink:label="loc_us-gaap_CommitmentsAndContingenciesDisclosureTextBlock_D4E11E7ABDA54463EE016B6F61F74A69" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_algn_NotesToFinancialStatementsAbstract_BE019F110313C17EC2FB6B6F61F7B341" xlink:to="loc_us-gaap_CommitmentsAndContingenciesDisclosureTextBlock_D4E11E7ABDA54463EE016B6F61F74A69" xlink:type="arc" />
  </presentationLink>
  <presentationLink xlink:role="http://www.aligntech.com/role/CommitmentsAndContingenciesTables" xlink:type="extended">
    <loc xlink:href="algn-20150331.xsd#algn_NotesToFinancialStatementsAbstract" xlink:label="loc_algn_NotesToFinancialStatementsAbstract_104FC959010DAB5B52006B6F6162A096" xlink:type="locator" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_ScheduleOfFutureMinimumRentalPaymentsForOperatingLeasesTableTextBlock" xlink:label="loc_us-gaap_ScheduleOfFutureMinimumRentalPaymentsForOperatingLeasesTableTextBlock_F817FED506CF45D3EED76B6F61622038" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_algn_NotesToFinancialStatementsAbstract_104FC959010DAB5B52006B6F6162A096" xlink:to="loc_us-gaap_ScheduleOfFutureMinimumRentalPaymentsForOperatingLeasesTableTextBlock_F817FED506CF45D3EED76B6F61622038" xlink:type="arc" />
  </presentationLink>
  <presentationLink xlink:role="http://www.aligntech.com/role/CommonStockRepurchaseProgram" xlink:type="extended">
    <loc xlink:href="algn-20150331.xsd#algn_NotesToFinancialStatementsAbstract" xlink:label="loc_algn_NotesToFinancialStatementsAbstract_CF2B19DC390A7758CB906B6F60E89B0C" xlink:type="locator" />
    <loc xlink:href="algn-20150331.xsd#algn_ShareRepurchaseProgramDisclosureTextBlock" xlink:label="loc_algn_ShareRepurchaseProgramDisclosureTextBlock_3B51032E93A4321AF13A6B6F60E8CCDE" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_algn_NotesToFinancialStatementsAbstract_CF2B19DC390A7758CB906B6F60E89B0C" xlink:to="loc_algn_ShareRepurchaseProgramDisclosureTextBlock_3B51032E93A4321AF13A6B6F60E8CCDE" xlink:type="arc" />
  </presentationLink>
  <presentationLink xlink:role="http://www.aligntech.com/role/CommonStockRepurchaseProgramAdditionalInformationDetails" xlink:type="extended">
    <loc xlink:href="algn-20150331.xsd#algn_DisclosureCommonStockRepurchaseProgramAdditionalInformationAbstract" xlink:label="loc_algn_DisclosureCommonStockRepurchaseProgramAdditionalInformationAbstract_3342DBDFD675821E0600FC59B02D4225" xlink:type="locator" />
    <loc xlink:href="algn-20150331.xsd#algn_ShareRepurchasesTable" xlink:label="loc_algn_ShareRepurchasesTable_13E1F6DE1019EAA0573BFC59B02E4F6F" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_algn_DisclosureCommonStockRepurchaseProgramAdditionalInformationAbstract_3342DBDFD675821E0600FC59B02D4225" xlink:to="loc_algn_ShareRepurchasesTable_13E1F6DE1019EAA0573BFC59B02E4F6F" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_SubsequentEventTypeAxis" xlink:label="loc_us-gaap_SubsequentEventTypeAxis_E8FBBDF59C5084FFCAF0FC59B02EEEE0" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_algn_ShareRepurchasesTable_13E1F6DE1019EAA0573BFC59B02E4F6F" xlink:to="loc_us-gaap_SubsequentEventTypeAxis_E8FBBDF59C5084FFCAF0FC59B02EEEE0" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_SubsequentEventTypeDomain" xlink:label="loc_us-gaap_SubsequentEventTypeDomain_34E2A6C71251D3E04737FC59B02EF9F6" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_SubsequentEventTypeAxis_E8FBBDF59C5084FFCAF0FC59B02EEEE0" xlink:to="loc_us-gaap_SubsequentEventTypeDomain_34E2A6C71251D3E04737FC59B02EF9F6" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_SubsequentEventMember" xlink:label="loc_us-gaap_SubsequentEventMember_9A06F8B4203D0CD25344FC59B02FEA5F" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_SubsequentEventTypeDomain_34E2A6C71251D3E04737FC59B02EF9F6" xlink:to="loc_us-gaap_SubsequentEventMember_9A06F8B4203D0CD25344FC59B02FEA5F" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_ShareRepurchaseProgramAxis" xlink:label="loc_us-gaap_ShareRepurchaseProgramAxis_CEFB548B42A39C7960B4FC59B02FA4B9" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_algn_ShareRepurchasesTable_13E1F6DE1019EAA0573BFC59B02E4F6F" xlink:to="loc_us-gaap_ShareRepurchaseProgramAxis_CEFB548B42A39C7960B4FC59B02FA4B9" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_ShareRepurchaseProgramDomain" xlink:label="loc_us-gaap_ShareRepurchaseProgramDomain_F865429B7CD2CE4380E2FC59B02FD2E4" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareRepurchaseProgramAxis_CEFB548B42A39C7960B4FC59B02FA4B9" xlink:to="loc_us-gaap_ShareRepurchaseProgramDomain_F865429B7CD2CE4380E2FC59B02FD2E4" xlink:type="arc" />
    <loc xlink:href="algn-20150331.xsd#algn_AcceleratedShareRepurchaseProgramMember" xlink:label="loc_algn_AcceleratedShareRepurchaseProgramMember_BA31A7D0F9A88D0B3272FC59B02F29E4" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareRepurchaseProgramDomain_F865429B7CD2CE4380E2FC59B02FD2E4" xlink:to="loc_algn_AcceleratedShareRepurchaseProgramMember_BA31A7D0F9A88D0B3272FC59B02F29E4" xlink:type="arc" />
    <loc xlink:href="algn-20150331.xsd#algn_ShareRepurchasesLineItems" xlink:label="loc_algn_ShareRepurchasesLineItems_8AFB9C0E3AFD01354B80FC59B02F50A4" xlink:type="locator" />
    <presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_algn_ShareRepurchasesTable_13E1F6DE1019EAA0573BFC59B02E4F6F" xlink:to="loc_algn_ShareRepurchasesLineItems_8AFB9C0E3AFD01354B80FC59B02F50A4" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_StockRepurchaseProgramAuthorizedAmount1" xlink:label="loc_us-gaap_StockRepurchaseProgramAuthorizedAmount1_9A46CCACC22274858805FC59B02FAA3A" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_algn_ShareRepurchasesLineItems_8AFB9C0E3AFD01354B80FC59B02F50A4" xlink:to="loc_us-gaap_StockRepurchaseProgramAuthorizedAmount1_9A46CCACC22274858805FC59B02FAA3A" xlink:type="arc" />
    <loc xlink:href="algn-20150331.xsd#algn_StockRepurchaseProgramAuthorizedAmountforNextTwelveMonths" xlink:label="loc_algn_StockRepurchaseProgramAuthorizedAmountforNextTwelveMonths_51E5EC8F6E598B17294BFC59B02FD0C6" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_algn_ShareRepurchasesLineItems_8AFB9C0E3AFD01354B80FC59B02F50A4" xlink:to="loc_algn_StockRepurchaseProgramAuthorizedAmountforNextTwelveMonths_51E5EC8F6E598B17294BFC59B02FD0C6" xlink:type="arc" />
    <loc xlink:href="algn-20150331.xsd#algn_AcceleratedShareRepurchaseContractedAmountofRepurchase" xlink:label="loc_algn_AcceleratedShareRepurchaseContractedAmountofRepurchase_52EA408E217284C4A1ECFC59B02F0363" xlink:type="locator" />
    <presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_algn_ShareRepurchasesLineItems_8AFB9C0E3AFD01354B80FC59B02F50A4" xlink:to="loc_algn_AcceleratedShareRepurchaseContractedAmountofRepurchase_52EA408E217284C4A1ECFC59B02F0363" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_AcceleratedShareRepurchasesSettlementPaymentOrReceipt" xlink:label="loc_us-gaap_AcceleratedShareRepurchasesSettlementPaymentOrReceipt_5517993FD45D2C25F6D5FC5CBE420AFE" xlink:type="locator" />
    <presentationArc order="4" preferredLabel="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_algn_ShareRepurchasesLineItems_8AFB9C0E3AFD01354B80FC59B02F50A4" xlink:to="loc_us-gaap_AcceleratedShareRepurchasesSettlementPaymentOrReceipt_5517993FD45D2C25F6D5FC5CBE420AFE" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_TreasuryStockSharesAcquired" xlink:label="loc_us-gaap_TreasuryStockSharesAcquired_CD9E1F9E70F2A0F0C72DFC59B02F5AED" xlink:type="locator" />
    <presentationArc order="5" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_algn_ShareRepurchasesLineItems_8AFB9C0E3AFD01354B80FC59B02F50A4" xlink:to="loc_us-gaap_TreasuryStockSharesAcquired_CD9E1F9E70F2A0F0C72DFC59B02F5AED" xlink:type="arc" />
    <loc xlink:href="algn-20150331.xsd#algn_ShareRepurchasesPricePaidPerShare" xlink:label="loc_algn_ShareRepurchasesPricePaidPerShare_6C40314A58B51D8357E8FC59B02FD9B1" xlink:type="locator" />
    <presentationArc order="6" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_algn_ShareRepurchasesLineItems_8AFB9C0E3AFD01354B80FC59B02F50A4" xlink:to="loc_algn_ShareRepurchasesPricePaidPerShare_6C40314A58B51D8357E8FC59B02FD9B1" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_StockRepurchasedDuringPeriodShares" xlink:label="loc_us-gaap_StockRepurchasedDuringPeriodShares_3C59387BED51243E110BFC59B02FD200" xlink:type="locator" />
    <presentationArc order="7" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_algn_ShareRepurchasesLineItems_8AFB9C0E3AFD01354B80FC59B02F50A4" xlink:to="loc_us-gaap_StockRepurchasedDuringPeriodShares_3C59387BED51243E110BFC59B02FD200" xlink:type="arc" />
    <loc xlink:href="algn-20150331.xsd#algn_StockRepurchasedDuringPeriodAveragePricePerShare" xlink:label="loc_algn_StockRepurchasedDuringPeriodAveragePricePerShare_BFCFBDF00996E1EF294AFC59B02FBC87" xlink:type="locator" />
    <presentationArc order="8" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_algn_ShareRepurchasesLineItems_8AFB9C0E3AFD01354B80FC59B02F50A4" xlink:to="loc_algn_StockRepurchasedDuringPeriodAveragePricePerShare_BFCFBDF00996E1EF294AFC59B02FBC87" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_StockRepurchasedDuringPeriodValue" xlink:label="loc_us-gaap_StockRepurchasedDuringPeriodValue_AF13FBB4602F508FDF98FC59B030FFBD" xlink:type="locator" />
    <presentationArc order="9" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_algn_ShareRepurchasesLineItems_8AFB9C0E3AFD01354B80FC59B02F50A4" xlink:to="loc_us-gaap_StockRepurchasedDuringPeriodValue_AF13FBB4602F508FDF98FC59B030FFBD" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_StockRepurchaseProgramRemainingAuthorizedRepurchaseAmount1" xlink:label="loc_us-gaap_StockRepurchaseProgramRemainingAuthorizedRepurchaseAmount1_720D063F242595D4607DFC59B030195F" xlink:type="locator" />
    <presentationArc order="10" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_algn_ShareRepurchasesLineItems_8AFB9C0E3AFD01354B80FC59B02F50A4" xlink:to="loc_us-gaap_StockRepurchaseProgramRemainingAuthorizedRepurchaseAmount1_720D063F242595D4607DFC59B030195F" xlink:type="arc" />
  </presentationLink>
  <presentationLink xlink:role="http://www.aligntech.com/role/ComputationOfBasicAndDilutedNetProfitPerShareAttributableToCommonStockDetails" xlink:type="extended">
    <loc xlink:href="algn-20150331.xsd#algn_DisclosureComputationOfBasicAndDilutedNetProfitPerShareAttributableToCommonStockAbstract" xlink:label="loc_algn_DisclosureComputationOfBasicAndDilutedNetProfitPerShareAttributableToCommonStockAbstract_043402574897747964E26B6F6104BBE4" xlink:type="locator" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_NetIncomeLoss" xlink:label="loc_us-gaap_NetIncomeLoss_63E1F6AC567F5B5910756B6F6104DAFE" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_algn_DisclosureComputationOfBasicAndDilutedNetProfitPerShareAttributableToCommonStockAbstract_043402574897747964E26B6F6104BBE4" xlink:to="loc_us-gaap_NetIncomeLoss_63E1F6AC567F5B5910756B6F6104DAFE" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_WeightedAverageNumberOfSharesOutstandingBasic" xlink:label="loc_us-gaap_WeightedAverageNumberOfSharesOutstandingBasic_2A650AADF36096685ED16B6F6104DAA2" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_algn_DisclosureComputationOfBasicAndDilutedNetProfitPerShareAttributableToCommonStockAbstract_043402574897747964E26B6F6104BBE4" xlink:to="loc_us-gaap_WeightedAverageNumberOfSharesOutstandingBasic_2A650AADF36096685ED16B6F6104DAA2" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_WeightedAverageNumberDilutedSharesOutstandingAdjustment" xlink:label="loc_us-gaap_WeightedAverageNumberDilutedSharesOutstandingAdjustment_E72E4E30A613B5FE23D06B6F6104C073" xlink:type="locator" />
    <presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_algn_DisclosureComputationOfBasicAndDilutedNetProfitPerShareAttributableToCommonStockAbstract_043402574897747964E26B6F6104BBE4" xlink:to="loc_us-gaap_WeightedAverageNumberDilutedSharesOutstandingAdjustment_E72E4E30A613B5FE23D06B6F6104C073" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding" xlink:label="loc_us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding_E6C3105F1D5D1018598C6B6F6104E625" xlink:type="locator" />
    <presentationArc order="4" preferredLabel="http://www.xbrl.org/2003/role/totalLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_algn_DisclosureComputationOfBasicAndDilutedNetProfitPerShareAttributableToCommonStockAbstract_043402574897747964E26B6F6104BBE4" xlink:to="loc_us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding_E6C3105F1D5D1018598C6B6F6104E625" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_EarningsPerShareBasic" xlink:label="loc_us-gaap_EarningsPerShareBasic_06DB2CB66E6CEF71C0126B6F61046F45" xlink:type="locator" />
    <presentationArc order="5" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_algn_DisclosureComputationOfBasicAndDilutedNetProfitPerShareAttributableToCommonStockAbstract_043402574897747964E26B6F6104BBE4" xlink:to="loc_us-gaap_EarningsPerShareBasic_06DB2CB66E6CEF71C0126B6F61046F45" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_EarningsPerShareDiluted" xlink:label="loc_us-gaap_EarningsPerShareDiluted_C7063A19610B0ABB33746B6F6104C0E0" xlink:type="locator" />
    <presentationArc order="6" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_algn_DisclosureComputationOfBasicAndDilutedNetProfitPerShareAttributableToCommonStockAbstract_043402574897747964E26B6F6104BBE4" xlink:to="loc_us-gaap_EarningsPerShareDiluted_C7063A19610B0ABB33746B6F6104C0E0" xlink:type="arc" />
  </presentationLink>
  <presentationLink xlink:role="http://www.aligntech.com/role/CondensedConsolidatedBalanceSheets" xlink:type="extended">
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_StatementOfFinancialPositionAbstract" xlink:label="loc_us-gaap_StatementOfFinancialPositionAbstract_209C23D5F5932603CCF9FB7716A74FFE" xlink:type="locator" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_AssetsAbstract" xlink:label="loc_us-gaap_AssetsAbstract_6271D1CA4EF8DF35DE18FB7716A7B244" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_StatementOfFinancialPositionAbstract_209C23D5F5932603CCF9FB7716A74FFE" xlink:to="loc_us-gaap_AssetsAbstract_6271D1CA4EF8DF35DE18FB7716A7B244" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_AssetsCurrentAbstract" xlink:label="loc_us-gaap_AssetsCurrentAbstract_BF33E9BDD87B9CF99A74FB7716A78C3C" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_AssetsAbstract_6271D1CA4EF8DF35DE18FB7716A7B244" xlink:to="loc_us-gaap_AssetsCurrentAbstract_BF33E9BDD87B9CF99A74FB7716A78C3C" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_CashAndCashEquivalentsAtCarryingValue" xlink:label="loc_us-gaap_CashAndCashEquivalentsAtCarryingValue_1E45563B5B7A2459BA4DFB7716A70E61" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_AssetsCurrentAbstract_BF33E9BDD87B9CF99A74FB7716A78C3C" xlink:to="loc_us-gaap_CashAndCashEquivalentsAtCarryingValue_1E45563B5B7A2459BA4DFB7716A70E61" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_AvailableForSaleSecuritiesDebtSecuritiesCurrent" xlink:label="loc_us-gaap_AvailableForSaleSecuritiesDebtSecuritiesCurrent_ECDCCF7F12916B49271CFB7716A77995" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_AssetsCurrentAbstract_BF33E9BDD87B9CF99A74FB7716A78C3C" xlink:to="loc_us-gaap_AvailableForSaleSecuritiesDebtSecuritiesCurrent_ECDCCF7F12916B49271CFB7716A77995" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_AccountsReceivableNetCurrent" xlink:label="loc_us-gaap_AccountsReceivableNetCurrent_A49A8833720B5B8DFE7FFB7716A7F3AE" xlink:type="locator" />
    <presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_AssetsCurrentAbstract_BF33E9BDD87B9CF99A74FB7716A78C3C" xlink:to="loc_us-gaap_AccountsReceivableNetCurrent_A49A8833720B5B8DFE7FFB7716A7F3AE" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_InventoryNet" xlink:label="loc_us-gaap_InventoryNet_3357674BC701D524AE7DFB7716A7E3FF" xlink:type="locator" />
    <presentationArc order="4" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_AssetsCurrentAbstract_BF33E9BDD87B9CF99A74FB7716A78C3C" xlink:to="loc_us-gaap_InventoryNet_3357674BC701D524AE7DFB7716A7E3FF" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_PrepaidExpenseAndOtherAssetsCurrent" xlink:label="loc_us-gaap_PrepaidExpenseAndOtherAssetsCurrent_80E9638148968C213CC8FB7716A793A0" xlink:type="locator" />
    <presentationArc order="5" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_AssetsCurrentAbstract_BF33E9BDD87B9CF99A74FB7716A78C3C" xlink:to="loc_us-gaap_PrepaidExpenseAndOtherAssetsCurrent_80E9638148968C213CC8FB7716A793A0" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_DeferredTaxAssetsLiabilitiesNetCurrent" xlink:label="loc_us-gaap_DeferredTaxAssetsLiabilitiesNetCurrent_BED931BD6D601FC4C619FB7716A795E7" xlink:type="locator" />
    <presentationArc order="6" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_AssetsCurrentAbstract_BF33E9BDD87B9CF99A74FB7716A78C3C" xlink:to="loc_us-gaap_DeferredTaxAssetsLiabilitiesNetCurrent_BED931BD6D601FC4C619FB7716A795E7" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_AssetsCurrent" xlink:label="loc_us-gaap_AssetsCurrent_2EFB84E905E19B38A892FB7716A7EA94" xlink:type="locator" />
    <presentationArc order="7" preferredLabel="http://www.xbrl.org/2003/role/totalLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_AssetsCurrentAbstract_BF33E9BDD87B9CF99A74FB7716A78C3C" xlink:to="loc_us-gaap_AssetsCurrent_2EFB84E905E19B38A892FB7716A7EA94" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_AvailableForSaleSecuritiesDebtSecuritiesNoncurrent" xlink:label="loc_us-gaap_AvailableForSaleSecuritiesDebtSecuritiesNoncurrent_919B446B579517D02826FB7716A77FC8" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_AssetsAbstract_6271D1CA4EF8DF35DE18FB7716A7B244" xlink:to="loc_us-gaap_AvailableForSaleSecuritiesDebtSecuritiesNoncurrent_919B446B579517D02826FB7716A77FC8" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_PropertyPlantAndEquipmentNet" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentNet_0811EBDEB1D2CC150FDEFB7716A71BD4" xlink:type="locator" />
    <presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_AssetsAbstract_6271D1CA4EF8DF35DE18FB7716A7B244" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentNet_0811EBDEB1D2CC150FDEFB7716A71BD4" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_Goodwill" xlink:label="loc_us-gaap_Goodwill_04BA4925EFA240C63E60FB7716A76D21" xlink:type="locator" />
    <presentationArc order="4" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_AssetsAbstract_6271D1CA4EF8DF35DE18FB7716A7B244" xlink:to="loc_us-gaap_Goodwill_04BA4925EFA240C63E60FB7716A76D21" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_DeferredTaxAssetsNetNoncurrent" xlink:label="loc_us-gaap_DeferredTaxAssetsNetNoncurrent_D7A2D1CEF9949F7795B5FB7716A7AE97" xlink:type="locator" />
    <presentationArc order="5" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_AssetsAbstract_6271D1CA4EF8DF35DE18FB7716A7B244" xlink:to="loc_us-gaap_DeferredTaxAssetsNetNoncurrent_D7A2D1CEF9949F7795B5FB7716A7AE97" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_OtherAssetsNoncurrent" xlink:label="loc_us-gaap_OtherAssetsNoncurrent_22EBF3192317EBCE8D08FB7716A761B0" xlink:type="locator" />
    <presentationArc order="6" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_AssetsAbstract_6271D1CA4EF8DF35DE18FB7716A7B244" xlink:to="loc_us-gaap_OtherAssetsNoncurrent_22EBF3192317EBCE8D08FB7716A761B0" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_Assets" xlink:label="loc_us-gaap_Assets_4565B88ECD1A7CBDEA1DFB7716A70D5C" xlink:type="locator" />
    <presentationArc order="7" preferredLabel="http://www.xbrl.org/2003/role/totalLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_AssetsAbstract_6271D1CA4EF8DF35DE18FB7716A7B244" xlink:to="loc_us-gaap_Assets_4565B88ECD1A7CBDEA1DFB7716A70D5C" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_LiabilitiesAndStockholdersEquityAbstract" xlink:label="loc_us-gaap_LiabilitiesAndStockholdersEquityAbstract_6BBB71A55CBC1EDD9ADCFB7716A7ED75" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_StatementOfFinancialPositionAbstract_209C23D5F5932603CCF9FB7716A74FFE" xlink:to="loc_us-gaap_LiabilitiesAndStockholdersEquityAbstract_6BBB71A55CBC1EDD9ADCFB7716A7ED75" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_LiabilitiesCurrentAbstract" xlink:label="loc_us-gaap_LiabilitiesCurrentAbstract_D95A4CDF23A7C24361F5FB7716A79E90" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquityAbstract_6BBB71A55CBC1EDD9ADCFB7716A7ED75" xlink:to="loc_us-gaap_LiabilitiesCurrentAbstract_D95A4CDF23A7C24361F5FB7716A79E90" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_AccountsPayableCurrent" xlink:label="loc_us-gaap_AccountsPayableCurrent_4B42398A6B77BCFB8FDAFB7716A76F62" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_LiabilitiesCurrentAbstract_D95A4CDF23A7C24361F5FB7716A79E90" xlink:to="loc_us-gaap_AccountsPayableCurrent_4B42398A6B77BCFB8FDAFB7716A76F62" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_AccruedLiabilitiesCurrent" xlink:label="loc_us-gaap_AccruedLiabilitiesCurrent_99BF0F1F9E4D83FD01EAFB7716A8FEDE" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_LiabilitiesCurrentAbstract_D95A4CDF23A7C24361F5FB7716A79E90" xlink:to="loc_us-gaap_AccruedLiabilitiesCurrent_99BF0F1F9E4D83FD01EAFB7716A8FEDE" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_DeferredRevenueCurrent" xlink:label="loc_us-gaap_DeferredRevenueCurrent_38CA680D9903DAA5A48EFB7716A82608" xlink:type="locator" />
    <presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_LiabilitiesCurrentAbstract_D95A4CDF23A7C24361F5FB7716A79E90" xlink:to="loc_us-gaap_DeferredRevenueCurrent_38CA680D9903DAA5A48EFB7716A82608" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_LiabilitiesCurrent" xlink:label="loc_us-gaap_LiabilitiesCurrent_6EC952606B34DEBBD04DFB7716A8F926" xlink:type="locator" />
    <presentationArc order="4" preferredLabel="http://www.xbrl.org/2003/role/totalLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_LiabilitiesCurrentAbstract_D95A4CDF23A7C24361F5FB7716A79E90" xlink:to="loc_us-gaap_LiabilitiesCurrent_6EC952606B34DEBBD04DFB7716A8F926" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_TaxesPayableCurrentAndNoncurrent" xlink:label="loc_us-gaap_TaxesPayableCurrentAndNoncurrent_123503F19BB5BC160312FB7716A84544" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquityAbstract_6BBB71A55CBC1EDD9ADCFB7716A7ED75" xlink:to="loc_us-gaap_TaxesPayableCurrentAndNoncurrent_123503F19BB5BC160312FB7716A84544" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_OtherLiabilitiesNoncurrent" xlink:label="loc_us-gaap_OtherLiabilitiesNoncurrent_B66C082AE34D40A9BF83FB7716A86C59" xlink:type="locator" />
    <presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquityAbstract_6BBB71A55CBC1EDD9ADCFB7716A7ED75" xlink:to="loc_us-gaap_OtherLiabilitiesNoncurrent_B66C082AE34D40A9BF83FB7716A86C59" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_Liabilities" xlink:label="loc_us-gaap_Liabilities_7BA70A9FA7A15B65DF6AFB7716A860E5" xlink:type="locator" />
    <presentationArc order="4" preferredLabel="http://www.xbrl.org/2003/role/totalLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquityAbstract_6BBB71A55CBC1EDD9ADCFB7716A7ED75" xlink:to="loc_us-gaap_Liabilities_7BA70A9FA7A15B65DF6AFB7716A860E5" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_CommitmentsAndContingencies" xlink:label="loc_us-gaap_CommitmentsAndContingencies_A98D407FFB749380636DFB7716A89295" xlink:type="locator" />
    <presentationArc order="5" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquityAbstract_6BBB71A55CBC1EDD9ADCFB7716A7ED75" xlink:to="loc_us-gaap_CommitmentsAndContingencies_A98D407FFB749380636DFB7716A89295" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_StockholdersEquityAbstract" xlink:label="loc_us-gaap_StockholdersEquityAbstract_4A0443E3FF24E4937A97FB7716A8F003" xlink:type="locator" />
    <presentationArc order="6" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquityAbstract_6BBB71A55CBC1EDD9ADCFB7716A7ED75" xlink:to="loc_us-gaap_StockholdersEquityAbstract_4A0443E3FF24E4937A97FB7716A8F003" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_PreferredStockValue" xlink:label="loc_us-gaap_PreferredStockValue_0F1A131860D0CB8D8978FB7716A817F0" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_StockholdersEquityAbstract_4A0443E3FF24E4937A97FB7716A8F003" xlink:to="loc_us-gaap_PreferredStockValue_0F1A131860D0CB8D8978FB7716A817F0" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_CommonStockValue" xlink:label="loc_us-gaap_CommonStockValue_C0A4696ECD81DDC0A91BFB7716A85817" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_StockholdersEquityAbstract_4A0443E3FF24E4937A97FB7716A8F003" xlink:to="loc_us-gaap_CommonStockValue_C0A4696ECD81DDC0A91BFB7716A85817" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_AdditionalPaidInCapital" xlink:label="loc_us-gaap_AdditionalPaidInCapital_2CF0DE7BB8F25F35E385FB7716A81D41" xlink:type="locator" />
    <presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_StockholdersEquityAbstract_4A0443E3FF24E4937A97FB7716A8F003" xlink:to="loc_us-gaap_AdditionalPaidInCapital_2CF0DE7BB8F25F35E385FB7716A81D41" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax" xlink:label="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax_3AF372F790C2D9F92E72FB7716A8076B" xlink:type="locator" />
    <presentationArc order="4" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_StockholdersEquityAbstract_4A0443E3FF24E4937A97FB7716A8F003" xlink:to="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax_3AF372F790C2D9F92E72FB7716A8076B" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_RetainedEarningsAccumulatedDeficit" xlink:label="loc_us-gaap_RetainedEarningsAccumulatedDeficit_C296DD8F4DC4C6BE6FFAFB7716A84F88" xlink:type="locator" />
    <presentationArc order="5" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_StockholdersEquityAbstract_4A0443E3FF24E4937A97FB7716A8F003" xlink:to="loc_us-gaap_RetainedEarningsAccumulatedDeficit_C296DD8F4DC4C6BE6FFAFB7716A84F88" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_StockholdersEquity" xlink:label="loc_us-gaap_StockholdersEquity_1B43B3622403679197E2FB7716A82DCE" xlink:type="locator" />
    <presentationArc order="6" preferredLabel="http://www.xbrl.org/2003/role/totalLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_StockholdersEquityAbstract_4A0443E3FF24E4937A97FB7716A8F003" xlink:to="loc_us-gaap_StockholdersEquity_1B43B3622403679197E2FB7716A82DCE" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_LiabilitiesAndStockholdersEquity" xlink:label="loc_us-gaap_LiabilitiesAndStockholdersEquity_3F0D7A53851783DDEF39FB7716A8D3F7" xlink:type="locator" />
    <presentationArc order="7" preferredLabel="http://www.xbrl.org/2003/role/totalLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquityAbstract_6BBB71A55CBC1EDD9ADCFB7716A7ED75" xlink:to="loc_us-gaap_LiabilitiesAndStockholdersEquity_3F0D7A53851783DDEF39FB7716A8D3F7" xlink:type="arc" />
  </presentationLink>
  <presentationLink xlink:role="http://www.aligntech.com/role/CondensedConsolidatedBalanceSheetsParenthetical" xlink:type="extended">
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_StatementOfFinancialPositionAbstract" xlink:label="loc_us-gaap_StatementOfFinancialPositionAbstract_1B4313761F951072E06F6B6F6138D6D7" xlink:type="locator" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_StatementTable" xlink:label="loc_us-gaap_StatementTable_653257098A8480AC27D36B6F613845DC" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_StatementOfFinancialPositionAbstract_1B4313761F951072E06F6B6F6138D6D7" xlink:to="loc_us-gaap_StatementTable_653257098A8480AC27D36B6F613845DC" xlink:type="arc" />
    <loc xlink:href="http://xbrl.sec.gov/dei/2014/dei-2014-01-31.xsd#dei_LegalEntityAxis" xlink:label="loc_dei_LegalEntityAxis_FCF3C282157102876B7F6B6F61380D74" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_StatementTable_653257098A8480AC27D36B6F613845DC" xlink:to="loc_dei_LegalEntityAxis_FCF3C282157102876B7F6B6F61380D74" xlink:type="arc" />
    <loc xlink:href="http://xbrl.sec.gov/dei/2014/dei-2014-01-31.xsd#dei_EntityDomain" xlink:label="loc_dei_EntityDomain_42A3EBA0E519B45415656B6F61386F1C" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_LegalEntityAxis_FCF3C282157102876B7F6B6F61380D74" xlink:to="loc_dei_EntityDomain_42A3EBA0E519B45415656B6F61386F1C" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_StatementLineItems" xlink:label="loc_us-gaap_StatementLineItems_9FC7C0CF07BD6C88BBB76B6F61388498" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_StatementTable_653257098A8480AC27D36B6F613845DC" xlink:to="loc_us-gaap_StatementLineItems_9FC7C0CF07BD6C88BBB76B6F61388498" xlink:type="arc" />
    <loc xlink:href="algn-20150331.xsd#algn_AllowanceForDoubtfulAccountsReceivableAndSalesReturnsCurrent" xlink:label="loc_algn_AllowanceForDoubtfulAccountsReceivableAndSalesReturnsCurrent_6AEFBD454181F617DCC96B6F6138DDA8" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_StatementLineItems_9FC7C0CF07BD6C88BBB76B6F61388498" xlink:to="loc_algn_AllowanceForDoubtfulAccountsReceivableAndSalesReturnsCurrent_6AEFBD454181F617DCC96B6F6138DDA8" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_PreferredStockParOrStatedValuePerShare" xlink:label="loc_us-gaap_PreferredStockParOrStatedValuePerShare_DBCA332448536D2B76FC6B6F61381B37" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_StatementLineItems_9FC7C0CF07BD6C88BBB76B6F61388498" xlink:to="loc_us-gaap_PreferredStockParOrStatedValuePerShare_DBCA332448536D2B76FC6B6F61381B37" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_PreferredStockSharesAuthorized" xlink:label="loc_us-gaap_PreferredStockSharesAuthorized_E0852846E1DA6B48834A6B6F61381409" xlink:type="locator" />
    <presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_StatementLineItems_9FC7C0CF07BD6C88BBB76B6F61388498" xlink:to="loc_us-gaap_PreferredStockSharesAuthorized_E0852846E1DA6B48834A6B6F61381409" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_PreferredStockSharesIssued" xlink:label="loc_us-gaap_PreferredStockSharesIssued_344C946C4792C8833F7E6B6F61389248" xlink:type="locator" />
    <presentationArc order="4" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_StatementLineItems_9FC7C0CF07BD6C88BBB76B6F61388498" xlink:to="loc_us-gaap_PreferredStockSharesIssued_344C946C4792C8833F7E6B6F61389248" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_CommonStockParOrStatedValuePerShare" xlink:label="loc_us-gaap_CommonStockParOrStatedValuePerShare_EB524FB9183E93DAB34E6B6F61386A3E" xlink:type="locator" />
    <presentationArc order="5" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_StatementLineItems_9FC7C0CF07BD6C88BBB76B6F61388498" xlink:to="loc_us-gaap_CommonStockParOrStatedValuePerShare_EB524FB9183E93DAB34E6B6F61386A3E" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_CommonStockSharesAuthorized" xlink:label="loc_us-gaap_CommonStockSharesAuthorized_EA8C9CA6A49AB952168F6B6F61389D52" xlink:type="locator" />
    <presentationArc order="6" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_StatementLineItems_9FC7C0CF07BD6C88BBB76B6F61388498" xlink:to="loc_us-gaap_CommonStockSharesAuthorized_EA8C9CA6A49AB952168F6B6F61389D52" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_CommonStockSharesIssued" xlink:label="loc_us-gaap_CommonStockSharesIssued_105A8EEE9B8CED0DA0CB6B6F61385B8A" xlink:type="locator" />
    <presentationArc order="7" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_StatementLineItems_9FC7C0CF07BD6C88BBB76B6F61388498" xlink:to="loc_us-gaap_CommonStockSharesIssued_105A8EEE9B8CED0DA0CB6B6F61385B8A" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_CommonStockSharesOutstanding" xlink:label="loc_us-gaap_CommonStockSharesOutstanding_C1F58A927E50024C2A3D6B6F6138B0C0" xlink:type="locator" />
    <presentationArc order="8" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_StatementLineItems_9FC7C0CF07BD6C88BBB76B6F61388498" xlink:to="loc_us-gaap_CommonStockSharesOutstanding_C1F58A927E50024C2A3D6B6F6138B0C0" xlink:type="arc" />
  </presentationLink>
  <presentationLink xlink:role="http://www.aligntech.com/role/CondensedConsolidatedStatementsOfCashFlows" xlink:type="extended">
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_StatementOfCashFlowsAbstract" xlink:label="loc_us-gaap_StatementOfCashFlowsAbstract_7F9F5A75A03ACD6DB735FBABA401D612" xlink:type="locator" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract" xlink:label="loc_us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract_DF7084C0EE2DFA71D649FBABA401AF86" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_StatementOfCashFlowsAbstract_7F9F5A75A03ACD6DB735FBABA401D612" xlink:to="loc_us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract_DF7084C0EE2DFA71D649FBABA401AF86" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_NetIncomeLoss" xlink:label="loc_us-gaap_NetIncomeLoss_ACE72DE71841C6E5918FFBABA4012A2F" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract_DF7084C0EE2DFA71D649FBABA401AF86" xlink:to="loc_us-gaap_NetIncomeLoss_ACE72DE71841C6E5918FFBABA4012A2F" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract" xlink:label="loc_us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_94ED7270C0153D1CA8D0FBABA401FB9F" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract_DF7084C0EE2DFA71D649FBABA401AF86" xlink:to="loc_us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_94ED7270C0153D1CA8D0FBABA401FB9F" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_DeferredIncomeTaxExpenseBenefit" xlink:label="loc_us-gaap_DeferredIncomeTaxExpenseBenefit_7B17B23B9280E595481DFBABA401DDE9" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_94ED7270C0153D1CA8D0FBABA401FB9F" xlink:to="loc_us-gaap_DeferredIncomeTaxExpenseBenefit_7B17B23B9280E595481DFBABA401DDE9" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_DepreciationDepletionAndAmortization" xlink:label="loc_us-gaap_DepreciationDepletionAndAmortization_1AC44B20D2B7C2AD7D22FBABA401D645" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_94ED7270C0153D1CA8D0FBABA401FB9F" xlink:to="loc_us-gaap_DepreciationDepletionAndAmortization_1AC44B20D2B7C2AD7D22FBABA401D645" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_ShareBasedCompensation" xlink:label="loc_us-gaap_ShareBasedCompensation_533B57A05C0BBBCBDFB8FBABA4017745" xlink:type="locator" />
    <presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_94ED7270C0153D1CA8D0FBABA401FB9F" xlink:to="loc_us-gaap_ShareBasedCompensation_533B57A05C0BBBCBDFB8FBABA4017745" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_ExcessTaxBenefitFromShareBasedCompensationOperatingActivities" xlink:label="loc_us-gaap_ExcessTaxBenefitFromShareBasedCompensationOperatingActivities_181A5C8490F16B1C4A53FBABA4018B6C" xlink:type="locator" />
    <presentationArc order="4" preferredLabel="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_94ED7270C0153D1CA8D0FBABA401FB9F" xlink:to="loc_us-gaap_ExcessTaxBenefitFromShareBasedCompensationOperatingActivities_181A5C8490F16B1C4A53FBABA4018B6C" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_OtherNoncashIncomeExpense" xlink:label="loc_us-gaap_OtherNoncashIncomeExpense_8DB07753205559011AC3FBABA401F46D" xlink:type="locator" />
    <presentationArc order="5" preferredLabel="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_94ED7270C0153D1CA8D0FBABA401FB9F" xlink:to="loc_us-gaap_OtherNoncashIncomeExpense_8DB07753205559011AC3FBABA401F46D" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_IncreaseDecreaseInOperatingCapitalAbstract" xlink:label="loc_us-gaap_IncreaseDecreaseInOperatingCapitalAbstract_BC51822154BE41C14FFAFBABA4019518" xlink:type="locator" />
    <presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract_DF7084C0EE2DFA71D649FBABA401AF86" xlink:to="loc_us-gaap_IncreaseDecreaseInOperatingCapitalAbstract_BC51822154BE41C14FFAFBABA4019518" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_IncreaseDecreaseInAccountsReceivable" xlink:label="loc_us-gaap_IncreaseDecreaseInAccountsReceivable_872C31160334D6344953FBABA4016DFD" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2009/role/negatedLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_IncreaseDecreaseInOperatingCapitalAbstract_BC51822154BE41C14FFAFBABA4019518" xlink:to="loc_us-gaap_IncreaseDecreaseInAccountsReceivable_872C31160334D6344953FBABA4016DFD" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_IncreaseDecreaseInInventories" xlink:label="loc_us-gaap_IncreaseDecreaseInInventories_97FD2803AF7A5E43BF3EFBABA40146F2" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2009/role/negatedLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_IncreaseDecreaseInOperatingCapitalAbstract_BC51822154BE41C14FFAFBABA4019518" xlink:to="loc_us-gaap_IncreaseDecreaseInInventories_97FD2803AF7A5E43BF3EFBABA40146F2" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets" xlink:label="loc_us-gaap_IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets_5563676E2552FA2850F7FBABA4020122" xlink:type="locator" />
    <presentationArc order="3" preferredLabel="http://www.xbrl.org/2009/role/negatedLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_IncreaseDecreaseInOperatingCapitalAbstract_BC51822154BE41C14FFAFBABA4019518" xlink:to="loc_us-gaap_IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets_5563676E2552FA2850F7FBABA4020122" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_IncreaseDecreaseInAccountsPayable" xlink:label="loc_us-gaap_IncreaseDecreaseInAccountsPayable_4CC47B0A2E46DA09FB76FBABA402AABC" xlink:type="locator" />
    <presentationArc order="4" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_IncreaseDecreaseInOperatingCapitalAbstract_BC51822154BE41C14FFAFBABA4019518" xlink:to="loc_us-gaap_IncreaseDecreaseInAccountsPayable_4CC47B0A2E46DA09FB76FBABA402AABC" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_IncreaseDecreaseInAccruedLiabilitiesAndOtherOperatingLiabilities" xlink:label="loc_us-gaap_IncreaseDecreaseInAccruedLiabilitiesAndOtherOperatingLiabilities_6A743852BFCFF9624CCAFBABA40252C7" xlink:type="locator" />
    <presentationArc order="5" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_IncreaseDecreaseInOperatingCapitalAbstract_BC51822154BE41C14FFAFBABA4019518" xlink:to="loc_us-gaap_IncreaseDecreaseInAccruedLiabilitiesAndOtherOperatingLiabilities_6A743852BFCFF9624CCAFBABA40252C7" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_IncreaseDecreaseInDeferredRevenue" xlink:label="loc_us-gaap_IncreaseDecreaseInDeferredRevenue_4FD722B5E567622B2634FBABA402FA6D" xlink:type="locator" />
    <presentationArc order="6" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_IncreaseDecreaseInOperatingCapitalAbstract_BC51822154BE41C14FFAFBABA4019518" xlink:to="loc_us-gaap_IncreaseDecreaseInDeferredRevenue_4FD722B5E567622B2634FBABA402FA6D" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_NetCashProvidedByUsedInOperatingActivities" xlink:label="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_DB18DEEA7FE364657779FBABA402E024" xlink:type="locator" />
    <presentationArc order="4" preferredLabel="http://www.xbrl.org/2003/role/totalLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract_DF7084C0EE2DFA71D649FBABA401AF86" xlink:to="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_DB18DEEA7FE364657779FBABA402E024" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract" xlink:label="loc_us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract_2EF318B4BCAD883E8C04FBABA4026219" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_StatementOfCashFlowsAbstract_7F9F5A75A03ACD6DB735FBABA401D612" xlink:to="loc_us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract_2EF318B4BCAD883E8C04FBABA4026219" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_PaymentsToAcquirePropertyPlantAndEquipment" xlink:label="loc_us-gaap_PaymentsToAcquirePropertyPlantAndEquipment_9013666D4B9125CC7C41FBABA402C61B" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2009/role/negatedLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract_2EF318B4BCAD883E8C04FBABA4026219" xlink:to="loc_us-gaap_PaymentsToAcquirePropertyPlantAndEquipment_9013666D4B9125CC7C41FBABA402C61B" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_PaymentsToAcquireAvailableForSaleSecurities" xlink:label="loc_us-gaap_PaymentsToAcquireAvailableForSaleSecurities_645F890D82B8E63CCBE0FBABA40214B6" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2009/role/negatedLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract_2EF318B4BCAD883E8C04FBABA4026219" xlink:to="loc_us-gaap_PaymentsToAcquireAvailableForSaleSecurities_645F890D82B8E63CCBE0FBABA40214B6" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_ProceedsFromSaleAndMaturityOfAvailableForSaleSecurities" xlink:label="loc_us-gaap_ProceedsFromSaleAndMaturityOfAvailableForSaleSecurities_B4EC8713CA25051C5909FBABA4026D31" xlink:type="locator" />
    <presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract_2EF318B4BCAD883E8C04FBABA4026219" xlink:to="loc_us-gaap_ProceedsFromSaleAndMaturityOfAvailableForSaleSecurities_B4EC8713CA25051C5909FBABA4026D31" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_ProceedsFromSaleOfAvailableForSaleSecurities" xlink:label="loc_us-gaap_ProceedsFromSaleOfAvailableForSaleSecurities_3EE8E2FD1ED78546F4ADFBABA402C3C9" xlink:type="locator" />
    <presentationArc order="4" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract_2EF318B4BCAD883E8C04FBABA4026219" xlink:to="loc_us-gaap_ProceedsFromSaleOfAvailableForSaleSecurities_3EE8E2FD1ED78546F4ADFBABA402C3C9" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_PaymentsForProceedsFromOtherInvestingActivities" xlink:label="loc_us-gaap_PaymentsForProceedsFromOtherInvestingActivities_43E98B14E83F5BD1C1C0FBABA402BBE5" xlink:type="locator" />
    <presentationArc order="5" preferredLabel="http://www.xbrl.org/2009/role/negatedLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract_2EF318B4BCAD883E8C04FBABA4026219" xlink:to="loc_us-gaap_PaymentsForProceedsFromOtherInvestingActivities_43E98B14E83F5BD1C1C0FBABA402BBE5" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_NetCashProvidedByUsedInInvestingActivities" xlink:label="loc_us-gaap_NetCashProvidedByUsedInInvestingActivities_9DB4320DB8CF89A72026FBABA403CA8E" xlink:type="locator" />
    <presentationArc order="6" preferredLabel="http://www.xbrl.org/2003/role/totalLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract_2EF318B4BCAD883E8C04FBABA4026219" xlink:to="loc_us-gaap_NetCashProvidedByUsedInInvestingActivities_9DB4320DB8CF89A72026FBABA403CA8E" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract" xlink:label="loc_us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_7BBA3C7A16C77C86DDBDFBABA403E0E4" xlink:type="locator" />
    <presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_StatementOfCashFlowsAbstract_7F9F5A75A03ACD6DB735FBABA401D612" xlink:to="loc_us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_7BBA3C7A16C77C86DDBDFBABA403E0E4" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_ProceedsFromIssuanceOfCommonStock" xlink:label="loc_us-gaap_ProceedsFromIssuanceOfCommonStock_66020E1DCD57698DCB27FBABA403F797" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_7BBA3C7A16C77C86DDBDFBABA403E0E4" xlink:to="loc_us-gaap_ProceedsFromIssuanceOfCommonStock_66020E1DCD57698DCB27FBABA403F797" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_PaymentsForRepurchaseOfCommonStock" xlink:label="loc_us-gaap_PaymentsForRepurchaseOfCommonStock_9F86F97F2FC41E6B4D94FBABA4032D3F" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2009/role/negatedLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_7BBA3C7A16C77C86DDBDFBABA403E0E4" xlink:to="loc_us-gaap_PaymentsForRepurchaseOfCommonStock_9F86F97F2FC41E6B4D94FBABA4032D3F" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_ExcessTaxBenefitFromShareBasedCompensationFinancingActivities" xlink:label="loc_us-gaap_ExcessTaxBenefitFromShareBasedCompensationFinancingActivities_6C10462D296CFCEB74D6FBABA403AAD0" xlink:type="locator" />
    <presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_7BBA3C7A16C77C86DDBDFBABA403E0E4" xlink:to="loc_us-gaap_ExcessTaxBenefitFromShareBasedCompensationFinancingActivities_6C10462D296CFCEB74D6FBABA403AAD0" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_PaymentsRelatedToTaxWithholdingForShareBasedCompensation" xlink:label="loc_us-gaap_PaymentsRelatedToTaxWithholdingForShareBasedCompensation_9414C7BB36EDFA9EFE71FBABA40381D5" xlink:type="locator" />
    <presentationArc order="4" preferredLabel="http://www.xbrl.org/2009/role/negatedLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_7BBA3C7A16C77C86DDBDFBABA403E0E4" xlink:to="loc_us-gaap_PaymentsRelatedToTaxWithholdingForShareBasedCompensation_9414C7BB36EDFA9EFE71FBABA40381D5" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_NetCashProvidedByUsedInFinancingActivities" xlink:label="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_67B59AD8D1249DB4BE08FBABA40314AA" xlink:type="locator" />
    <presentationArc order="5" preferredLabel="http://www.xbrl.org/2003/role/totalLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_7BBA3C7A16C77C86DDBDFBABA403E0E4" xlink:to="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_67B59AD8D1249DB4BE08FBABA40314AA" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_EffectOfExchangeRateOnCashAndCashEquivalents" xlink:label="loc_us-gaap_EffectOfExchangeRateOnCashAndCashEquivalents_725BA78AED6C350CE7C3FBABA4034B4C" xlink:type="locator" />
    <presentationArc order="4" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_StatementOfCashFlowsAbstract_7F9F5A75A03ACD6DB735FBABA401D612" xlink:to="loc_us-gaap_EffectOfExchangeRateOnCashAndCashEquivalents_725BA78AED6C350CE7C3FBABA4034B4C" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease" xlink:label="loc_us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease_D9CF5B4460522367260CFBABA4032A67" xlink:type="locator" />
    <presentationArc order="5" preferredLabel="http://www.xbrl.org/2003/role/totalLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_StatementOfCashFlowsAbstract_7F9F5A75A03ACD6DB735FBABA401D612" xlink:to="loc_us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease_D9CF5B4460522367260CFBABA4032A67" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_CashAndCashEquivalentsAtCarryingValue" xlink:label="loc_us-gaap_CashAndCashEquivalentsAtCarryingValue_6C536534CAEF72ABB18BFBABA409B7F0" xlink:type="locator" />
    <presentationArc order="6" preferredLabel="http://www.xbrl.org/2003/role/periodStartLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_StatementOfCashFlowsAbstract_7F9F5A75A03ACD6DB735FBABA401D612" xlink:to="loc_us-gaap_CashAndCashEquivalentsAtCarryingValue_6C536534CAEF72ABB18BFBABA409B7F0" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_CashAndCashEquivalentsAtCarryingValue" xlink:label="loc_us-gaap_CashAndCashEquivalentsAtCarryingValue_485C2262CF7DB3500520FBABA409CE61" xlink:type="locator" />
    <presentationArc order="7" preferredLabel="http://www.xbrl.org/2003/role/periodEndLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_StatementOfCashFlowsAbstract_7F9F5A75A03ACD6DB735FBABA401D612" xlink:to="loc_us-gaap_CashAndCashEquivalentsAtCarryingValue_485C2262CF7DB3500520FBABA409CE61" xlink:type="arc" />
  </presentationLink>
  <presentationLink xlink:role="http://www.aligntech.com/role/CondensedConsolidatedStatementsOfComprehensiveIncome" xlink:type="extended">
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_StatementOfIncomeAndComprehensiveIncomeAbstract" xlink:label="loc_us-gaap_StatementOfIncomeAndComprehensiveIncomeAbstract_A0C8939A2E3D90E4AA9EE74D27ABBC81" xlink:type="locator" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_NetIncomeLoss" xlink:label="loc_us-gaap_NetIncomeLoss_C7F3D484924B5DB56881E74D27AB48BA" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_StatementOfIncomeAndComprehensiveIncomeAbstract_A0C8939A2E3D90E4AA9EE74D27ABBC81" xlink:to="loc_us-gaap_NetIncomeLoss_C7F3D484924B5DB56881E74D27AB48BA" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax_060647F54EDD61256D56E74D27ABDE13" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_StatementOfIncomeAndComprehensiveIncomeAbstract_A0C8939A2E3D90E4AA9EE74D27ABBC81" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax_060647F54EDD61256D56E74D27ABDE13" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax_2EA12A6AD7DC9CA0DFF7E74D27AB56A2" xlink:type="locator" />
    <presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_StatementOfIncomeAndComprehensiveIncomeAbstract_A0C8939A2E3D90E4AA9EE74D27ABBC81" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax_2EA12A6AD7DC9CA0DFF7E74D27AB56A2" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_OtherComprehensiveIncomeLossNetOfTax" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTax_3975508E36119553D929E74D27B04636" xlink:type="locator" />
    <presentationArc order="4" preferredLabel="http://www.xbrl.org/2003/role/totalLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_StatementOfIncomeAndComprehensiveIncomeAbstract_A0C8939A2E3D90E4AA9EE74D27ABBC81" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTax_3975508E36119553D929E74D27B04636" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_ComprehensiveIncomeNetOfTax" xlink:label="loc_us-gaap_ComprehensiveIncomeNetOfTax_591E909EC02A07009C5DE74D27B164FA" xlink:type="locator" />
    <presentationArc order="5" preferredLabel="http://www.xbrl.org/2003/role/totalLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_StatementOfIncomeAndComprehensiveIncomeAbstract_A0C8939A2E3D90E4AA9EE74D27ABBC81" xlink:to="loc_us-gaap_ComprehensiveIncomeNetOfTax_591E909EC02A07009C5DE74D27B164FA" xlink:type="arc" />
  </presentationLink>
  <presentationLink xlink:role="http://www.aligntech.com/role/CondensedConsolidatedStatementsOfOperations" xlink:type="extended">
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_IncomeStatementAbstract" xlink:label="loc_us-gaap_IncomeStatementAbstract_079195482F2B3A465A04FBABA45A588E" xlink:type="locator" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_SalesRevenueNet" xlink:label="loc_us-gaap_SalesRevenueNet_A72AE8FE795746AD7466FBABA45AEA73" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_IncomeStatementAbstract_079195482F2B3A465A04FBABA45A588E" xlink:to="loc_us-gaap_SalesRevenueNet_A72AE8FE795746AD7466FBABA45AEA73" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_CostOfRevenue" xlink:label="loc_us-gaap_CostOfRevenue_9C95EB968C44FD70FE94FBABA4601AA0" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_IncomeStatementAbstract_079195482F2B3A465A04FBABA45A588E" xlink:to="loc_us-gaap_CostOfRevenue_9C95EB968C44FD70FE94FBABA4601AA0" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_GrossProfit" xlink:label="loc_us-gaap_GrossProfit_D9F085A461B11BA5C081FBABA460AFD0" xlink:type="locator" />
    <presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/totalLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_IncomeStatementAbstract_079195482F2B3A465A04FBABA45A588E" xlink:to="loc_us-gaap_GrossProfit_D9F085A461B11BA5C081FBABA460AFD0" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_OperatingExpensesAbstract" xlink:label="loc_us-gaap_OperatingExpensesAbstract_E109DFDD9723ACDF9445FBABA4605CE1" xlink:type="locator" />
    <presentationArc order="4" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_IncomeStatementAbstract_079195482F2B3A465A04FBABA45A588E" xlink:to="loc_us-gaap_OperatingExpensesAbstract_E109DFDD9723ACDF9445FBABA4605CE1" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_SellingAndMarketingExpense" xlink:label="loc_us-gaap_SellingAndMarketingExpense_4C54CDA3701299EA3699FBABA460963F" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_OperatingExpensesAbstract_E109DFDD9723ACDF9445FBABA4605CE1" xlink:to="loc_us-gaap_SellingAndMarketingExpense_4C54CDA3701299EA3699FBABA460963F" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_ResearchAndDevelopmentExpense" xlink:label="loc_us-gaap_ResearchAndDevelopmentExpense_95A981E659AC05396CCEFBABA460DF73" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_OperatingExpensesAbstract_E109DFDD9723ACDF9445FBABA4605CE1" xlink:to="loc_us-gaap_ResearchAndDevelopmentExpense_95A981E659AC05396CCEFBABA460DF73" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_OperatingExpenses" xlink:label="loc_us-gaap_OperatingExpenses_D3ED639341889A13883DFBABA46084ED" xlink:type="locator" />
    <presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/totalLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_OperatingExpensesAbstract_E109DFDD9723ACDF9445FBABA4605CE1" xlink:to="loc_us-gaap_OperatingExpenses_D3ED639341889A13883DFBABA46084ED" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_OperatingIncomeLoss" xlink:label="loc_us-gaap_OperatingIncomeLoss_D0678365F4231C31E09AFBABA460CD46" xlink:type="locator" />
    <presentationArc order="5" preferredLabel="http://www.xbrl.org/2003/role/totalLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_IncomeStatementAbstract_079195482F2B3A465A04FBABA45A588E" xlink:to="loc_us-gaap_OperatingIncomeLoss_D0678365F4231C31E09AFBABA460CD46" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_NonoperatingIncomeExpense" xlink:label="loc_us-gaap_NonoperatingIncomeExpense_036410C7BF9E2D0AE792FBABA4604C4A" xlink:type="locator" />
    <presentationArc order="6" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_IncomeStatementAbstract_079195482F2B3A465A04FBABA45A588E" xlink:to="loc_us-gaap_NonoperatingIncomeExpense_036410C7BF9E2D0AE792FBABA4604C4A" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments" xlink:label="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments_88A4123172E889DC424CFBABA4614EE3" xlink:type="locator" />
    <presentationArc order="7" preferredLabel="http://www.xbrl.org/2003/role/totalLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_IncomeStatementAbstract_079195482F2B3A465A04FBABA45A588E" xlink:to="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments_88A4123172E889DC424CFBABA4614EE3" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_IncomeTaxExpenseBenefit" xlink:label="loc_us-gaap_IncomeTaxExpenseBenefit_C824C55EF7A12D974202FBABA461E2E5" xlink:type="locator" />
    <presentationArc order="8" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_IncomeStatementAbstract_079195482F2B3A465A04FBABA45A588E" xlink:to="loc_us-gaap_IncomeTaxExpenseBenefit_C824C55EF7A12D974202FBABA461E2E5" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_NetIncomeLoss" xlink:label="loc_us-gaap_NetIncomeLoss_364CCDA6D233951F3D93FBABA461C8D4" xlink:type="locator" />
    <presentationArc order="9" preferredLabel="http://www.xbrl.org/2003/role/totalLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_IncomeStatementAbstract_079195482F2B3A465A04FBABA45A588E" xlink:to="loc_us-gaap_NetIncomeLoss_364CCDA6D233951F3D93FBABA461C8D4" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_EarningsPerShareAbstract" xlink:label="loc_us-gaap_EarningsPerShareAbstract_237FBD7C2E7CFC688654FBABA4614760" xlink:type="locator" />
    <presentationArc order="10" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_IncomeStatementAbstract_079195482F2B3A465A04FBABA45A588E" xlink:to="loc_us-gaap_EarningsPerShareAbstract_237FBD7C2E7CFC688654FBABA4614760" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_EarningsPerShareBasic" xlink:label="loc_us-gaap_EarningsPerShareBasic_482B3B9B7474F37DB8FAFBABA46105D7" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_EarningsPerShareAbstract_237FBD7C2E7CFC688654FBABA4614760" xlink:to="loc_us-gaap_EarningsPerShareBasic_482B3B9B7474F37DB8FAFBABA46105D7" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_EarningsPerShareDiluted" xlink:label="loc_us-gaap_EarningsPerShareDiluted_0190079525E9B2941871FBABA461A270" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_EarningsPerShareAbstract_237FBD7C2E7CFC688654FBABA4614760" xlink:to="loc_us-gaap_EarningsPerShareDiluted_0190079525E9B2941871FBABA461A270" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_WeightedAverageNumberOfSharesOutstandingAbstract" xlink:label="loc_us-gaap_WeightedAverageNumberOfSharesOutstandingAbstract_9D0F58A8EE3402DB4C76FBABA46125CF" xlink:type="locator" />
    <presentationArc order="11" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_IncomeStatementAbstract_079195482F2B3A465A04FBABA45A588E" xlink:to="loc_us-gaap_WeightedAverageNumberOfSharesOutstandingAbstract_9D0F58A8EE3402DB4C76FBABA46125CF" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_WeightedAverageNumberOfSharesOutstandingBasic" xlink:label="loc_us-gaap_WeightedAverageNumberOfSharesOutstandingBasic_5EC354AAF666A7263B67FBABA461965A" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_WeightedAverageNumberOfSharesOutstandingAbstract_9D0F58A8EE3402DB4C76FBABA46125CF" xlink:to="loc_us-gaap_WeightedAverageNumberOfSharesOutstandingBasic_5EC354AAF666A7263B67FBABA461965A" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding" xlink:label="loc_us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding_69FD1D411B08CB07AC8EFBABA46115A5" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_WeightedAverageNumberOfSharesOutstandingAbstract_9D0F58A8EE3402DB4C76FBABA46125CF" xlink:to="loc_us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding_69FD1D411B08CB07AC8EFBABA46115A5" xlink:type="arc" />
  </presentationLink>
  <presentationLink xlink:role="http://www.aligntech.com/role/CreditFacilities" xlink:type="extended">
    <loc xlink:href="algn-20150331.xsd#algn_NotesToFinancialStatementsAbstract" xlink:label="loc_algn_NotesToFinancialStatementsAbstract_734174CF1175DC5F7CCE6B6F616172C6" xlink:type="locator" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_DebtDisclosureTextBlock" xlink:label="loc_us-gaap_DebtDisclosureTextBlock_38974711392C62BE94C66B6F6161BACB" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_algn_NotesToFinancialStatementsAbstract_734174CF1175DC5F7CCE6B6F616172C6" xlink:to="loc_us-gaap_DebtDisclosureTextBlock_38974711392C62BE94C66B6F6161BACB" xlink:type="arc" />
  </presentationLink>
  <presentationLink xlink:role="http://www.aligntech.com/role/CreditFacilitiesAdditionalInformationDetails" xlink:type="extended">
    <loc xlink:href="algn-20150331.xsd#algn_DisclosureCreditFacilitiesAdditionalInformationAbstract" xlink:label="loc_algn_DisclosureCreditFacilitiesAdditionalInformationAbstract_37AD9CB2E73EDEAF35EA6B6F6125AE73" xlink:type="locator" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_LineOfCreditFacilityTable" xlink:label="loc_us-gaap_LineOfCreditFacilityTable_C5592CFC675A92C9E8496B6F6125910E" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_algn_DisclosureCreditFacilitiesAdditionalInformationAbstract_37AD9CB2E73EDEAF35EA6B6F6125AE73" xlink:to="loc_us-gaap_LineOfCreditFacilityTable_C5592CFC675A92C9E8496B6F6125910E" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_CreditFacilityAxis" xlink:label="loc_us-gaap_CreditFacilityAxis_793C9A7BABC4BDBAF8C96B6F6125286C" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_LineOfCreditFacilityTable_C5592CFC675A92C9E8496B6F6125910E" xlink:to="loc_us-gaap_CreditFacilityAxis_793C9A7BABC4BDBAF8C96B6F6125286C" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_CreditFacilityDomain" xlink:label="loc_us-gaap_CreditFacilityDomain_06FBC174AB273DB2EA436B6F61252D60" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_CreditFacilityAxis_793C9A7BABC4BDBAF8C96B6F6125286C" xlink:to="loc_us-gaap_CreditFacilityDomain_06FBC174AB273DB2EA436B6F61252D60" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_RevolvingCreditFacilityMember" xlink:label="loc_us-gaap_RevolvingCreditFacilityMember_9F47908E10D14160A2B26B6F6125D04C" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_CreditFacilityDomain_06FBC174AB273DB2EA436B6F61252D60" xlink:to="loc_us-gaap_RevolvingCreditFacilityMember_9F47908E10D14160A2B26B6F6125D04C" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_LetterOfCreditMember" xlink:label="loc_us-gaap_LetterOfCreditMember_35B594E23959D63CC8506B6F6125C2DB" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_CreditFacilityDomain_06FBC174AB273DB2EA436B6F61252D60" xlink:to="loc_us-gaap_LetterOfCreditMember_35B594E23959D63CC8506B6F6125C2DB" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_LineOfCreditFacilityAxis" xlink:label="loc_us-gaap_LineOfCreditFacilityAxis_03016E074A8A123AF0676B6F6125CF2D" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_LineOfCreditFacilityTable_C5592CFC675A92C9E8496B6F6125910E" xlink:to="loc_us-gaap_LineOfCreditFacilityAxis_03016E074A8A123AF0676B6F6125CF2D" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_LineOfCreditFacilityLenderDomain" xlink:label="loc_us-gaap_LineOfCreditFacilityLenderDomain_91AC802E855BB366A6B66B6F612511BE" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_LineOfCreditFacilityAxis_03016E074A8A123AF0676B6F6125CF2D" xlink:to="loc_us-gaap_LineOfCreditFacilityLenderDomain_91AC802E855BB366A6B66B6F612511BE" xlink:type="arc" />
    <loc xlink:href="algn-20150331.xsd#algn_WellsFargoMember" xlink:label="loc_algn_WellsFargoMember_F2835924AA9DA6BD0A186B6F61252407" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_LineOfCreditFacilityLenderDomain_91AC802E855BB366A6B66B6F612511BE" xlink:to="loc_algn_WellsFargoMember_F2835924AA9DA6BD0A186B6F61252407" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_LineOfCreditFacilityLineItems" xlink:label="loc_us-gaap_LineOfCreditFacilityLineItems_3582167471A5CC28E9A56B6F6125ADC8" xlink:type="locator" />
    <presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_LineOfCreditFacilityTable_C5592CFC675A92C9E8496B6F6125910E" xlink:to="loc_us-gaap_LineOfCreditFacilityLineItems_3582167471A5CC28E9A56B6F6125ADC8" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity" xlink:label="loc_us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity_88ECC470F02A6B89556F6B6F61269C0D" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_LineOfCreditFacilityLineItems_3582167471A5CC28E9A56B6F6125ADC8" xlink:to="loc_us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity_88ECC470F02A6B89556F6B6F61269C0D" xlink:type="arc" />
    <loc xlink:href="algn-20150331.xsd#algn_UnrestrictedCashDeposit" xlink:label="loc_algn_UnrestrictedCashDeposit_EC51F61330572737106F6B6F6126FE92" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_LineOfCreditFacilityLineItems_3582167471A5CC28E9A56B6F6125ADC8" xlink:to="loc_algn_UnrestrictedCashDeposit_EC51F61330572737106F6B6F6126FE92" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_DebtInstrumentBasisSpreadOnVariableRate1" xlink:label="loc_us-gaap_DebtInstrumentBasisSpreadOnVariableRate1_1611D939868E4EB7314B6B6F61267769" xlink:type="locator" />
    <presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_LineOfCreditFacilityLineItems_3582167471A5CC28E9A56B6F6125ADC8" xlink:to="loc_us-gaap_DebtInstrumentBasisSpreadOnVariableRate1_1611D939868E4EB7314B6B6F61267769" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_LineOfCredit" xlink:label="loc_us-gaap_LineOfCredit_6E2A3B2924391744EDD06B6F61261389" xlink:type="locator" />
    <presentationArc order="4" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_LineOfCreditFacilityLineItems_3582167471A5CC28E9A56B6F6125ADC8" xlink:to="loc_us-gaap_LineOfCredit_6E2A3B2924391744EDD06B6F61261389" xlink:type="arc" />
  </presentationLink>
  <presentationLink xlink:role="http://www.aligntech.com/role/DocumentAndEntityInformation" xlink:type="extended">
    <loc xlink:href="algn-20150331.xsd#algn_DocumentDocumentandEntityInformationAbstract" xlink:label="loc_algn_DocumentDocumentandEntityInformationAbstract_7815A1B6E22B4324C9656B6F619AB694" xlink:type="locator" />
    <loc xlink:href="http://xbrl.sec.gov/dei/2014/dei-2014-01-31.xsd#dei_EntitiesTable" xlink:label="loc_dei_EntitiesTable_2C923BB95308B2ADC9906B6F619AAF86" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_algn_DocumentDocumentandEntityInformationAbstract_7815A1B6E22B4324C9656B6F619AB694" xlink:to="loc_dei_EntitiesTable_2C923BB95308B2ADC9906B6F619AAF86" xlink:type="arc" />
    <loc xlink:href="http://xbrl.sec.gov/dei/2014/dei-2014-01-31.xsd#dei_LegalEntityAxis" xlink:label="loc_dei_LegalEntityAxis_DD73BDF3291B749712796B6F619B76DD" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_EntitiesTable_2C923BB95308B2ADC9906B6F619AAF86" xlink:to="loc_dei_LegalEntityAxis_DD73BDF3291B749712796B6F619B76DD" xlink:type="arc" />
    <loc xlink:href="http://xbrl.sec.gov/dei/2014/dei-2014-01-31.xsd#dei_EntityDomain" xlink:label="loc_dei_EntityDomain_7A93E2E3D29AA2A5DE266B6F619B3454" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_LegalEntityAxis_DD73BDF3291B749712796B6F619B76DD" xlink:to="loc_dei_EntityDomain_7A93E2E3D29AA2A5DE266B6F619B3454" xlink:type="arc" />
    <loc xlink:href="http://xbrl.sec.gov/dei/2014/dei-2014-01-31.xsd#dei_DocumentInformationLineItems" xlink:label="loc_dei_DocumentInformationLineItems_35C4F5209C5FD6130F6C6B6F619B67D0" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_EntitiesTable_2C923BB95308B2ADC9906B6F619AAF86" xlink:to="loc_dei_DocumentInformationLineItems_35C4F5209C5FD6130F6C6B6F619B67D0" xlink:type="arc" />
    <loc xlink:href="http://xbrl.sec.gov/dei/2014/dei-2014-01-31.xsd#dei_TradingSymbol" xlink:label="loc_dei_TradingSymbol_85D84E39CD1BB67AEFEB6B6F619B495A" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_DocumentInformationLineItems_35C4F5209C5FD6130F6C6B6F619B67D0" xlink:to="loc_dei_TradingSymbol_85D84E39CD1BB67AEFEB6B6F619B495A" xlink:type="arc" />
    <loc xlink:href="http://xbrl.sec.gov/dei/2014/dei-2014-01-31.xsd#dei_EntityRegistrantName" xlink:label="loc_dei_EntityRegistrantName_CD79E318A5AE9B13D4486B6F619BC0E1" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_DocumentInformationLineItems_35C4F5209C5FD6130F6C6B6F619B67D0" xlink:to="loc_dei_EntityRegistrantName_CD79E318A5AE9B13D4486B6F619BC0E1" xlink:type="arc" />
    <loc xlink:href="http://xbrl.sec.gov/dei/2014/dei-2014-01-31.xsd#dei_EntityCentralIndexKey" xlink:label="loc_dei_EntityCentralIndexKey_FF96D157E540E4D670F16B6F619BBCBA" xlink:type="locator" />
    <presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_DocumentInformationLineItems_35C4F5209C5FD6130F6C6B6F619B67D0" xlink:to="loc_dei_EntityCentralIndexKey_FF96D157E540E4D670F16B6F619BBCBA" xlink:type="arc" />
    <loc xlink:href="http://xbrl.sec.gov/dei/2014/dei-2014-01-31.xsd#dei_CurrentFiscalYearEndDate" xlink:label="loc_dei_CurrentFiscalYearEndDate_2EDC54AD8271BDDA54A26B6F619B41D6" xlink:type="locator" />
    <presentationArc order="4" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_DocumentInformationLineItems_35C4F5209C5FD6130F6C6B6F619B67D0" xlink:to="loc_dei_CurrentFiscalYearEndDate_2EDC54AD8271BDDA54A26B6F619B41D6" xlink:type="arc" />
    <loc xlink:href="http://xbrl.sec.gov/dei/2014/dei-2014-01-31.xsd#dei_EntityFilerCategory" xlink:label="loc_dei_EntityFilerCategory_2384F3A58697E4BE676A6B6F619B82C6" xlink:type="locator" />
    <presentationArc order="5" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_DocumentInformationLineItems_35C4F5209C5FD6130F6C6B6F619B67D0" xlink:to="loc_dei_EntityFilerCategory_2384F3A58697E4BE676A6B6F619B82C6" xlink:type="arc" />
    <loc xlink:href="http://xbrl.sec.gov/dei/2014/dei-2014-01-31.xsd#dei_DocumentType" xlink:label="loc_dei_DocumentType_BEF5543D63FCB77442AF6B6F619BB17D" xlink:type="locator" />
    <presentationArc order="6" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_DocumentInformationLineItems_35C4F5209C5FD6130F6C6B6F619B67D0" xlink:to="loc_dei_DocumentType_BEF5543D63FCB77442AF6B6F619BB17D" xlink:type="arc" />
    <loc xlink:href="http://xbrl.sec.gov/dei/2014/dei-2014-01-31.xsd#dei_DocumentPeriodEndDate" xlink:label="loc_dei_DocumentPeriodEndDate_722A3188B631B61857B06B6F619BAF1E" xlink:type="locator" />
    <presentationArc order="7" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_DocumentInformationLineItems_35C4F5209C5FD6130F6C6B6F619B67D0" xlink:to="loc_dei_DocumentPeriodEndDate_722A3188B631B61857B06B6F619BAF1E" xlink:type="arc" />
    <loc xlink:href="http://xbrl.sec.gov/dei/2014/dei-2014-01-31.xsd#dei_DocumentFiscalYearFocus" xlink:label="loc_dei_DocumentFiscalYearFocus_1687ED74CE87BCAA86AE6B6F619B44E7" xlink:type="locator" />
    <presentationArc order="8" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_DocumentInformationLineItems_35C4F5209C5FD6130F6C6B6F619B67D0" xlink:to="loc_dei_DocumentFiscalYearFocus_1687ED74CE87BCAA86AE6B6F619B44E7" xlink:type="arc" />
    <loc xlink:href="http://xbrl.sec.gov/dei/2014/dei-2014-01-31.xsd#dei_DocumentFiscalPeriodFocus" xlink:label="loc_dei_DocumentFiscalPeriodFocus_1471776A573C90CAE9896B6F619BAA69" xlink:type="locator" />
    <presentationArc order="9" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_DocumentInformationLineItems_35C4F5209C5FD6130F6C6B6F619B67D0" xlink:to="loc_dei_DocumentFiscalPeriodFocus_1471776A573C90CAE9896B6F619BAA69" xlink:type="arc" />
    <loc xlink:href="http://xbrl.sec.gov/dei/2014/dei-2014-01-31.xsd#dei_AmendmentFlag" xlink:label="loc_dei_AmendmentFlag_3C5908DB8B0D041624BD6B6F619BA03B" xlink:type="locator" />
    <presentationArc order="10" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_DocumentInformationLineItems_35C4F5209C5FD6130F6C6B6F619B67D0" xlink:to="loc_dei_AmendmentFlag_3C5908DB8B0D041624BD6B6F619BA03B" xlink:type="arc" />
    <loc xlink:href="http://xbrl.sec.gov/dei/2014/dei-2014-01-31.xsd#dei_EntityCommonStockSharesOutstanding" xlink:label="loc_dei_EntityCommonStockSharesOutstanding_818DD5DF4D79A3491C7E6B6F619BB2C3" xlink:type="locator" />
    <presentationArc order="11" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_DocumentInformationLineItems_35C4F5209C5FD6130F6C6B6F619B67D0" xlink:to="loc_dei_EntityCommonStockSharesOutstanding_818DD5DF4D79A3491C7E6B6F619BB2C3" xlink:type="arc" />
  </presentationLink>
  <presentationLink xlink:role="http://www.aligntech.com/role/GoodwillAndLongLivedAssets" xlink:type="extended">
    <loc xlink:href="algn-20150331.xsd#algn_NotesToFinancialStatementsAbstract" xlink:label="loc_algn_NotesToFinancialStatementsAbstract_F8D6FC51A920FA3094BF6B6F615D456C" xlink:type="locator" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_GoodwillAndIntangibleAssetsDisclosureTextBlock" xlink:label="loc_us-gaap_GoodwillAndIntangibleAssetsDisclosureTextBlock_B9FC246ED48F4AD07BA06B6F615DF697" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_algn_NotesToFinancialStatementsAbstract_F8D6FC51A920FA3094BF6B6F615D456C" xlink:to="loc_us-gaap_GoodwillAndIntangibleAssetsDisclosureTextBlock_B9FC246ED48F4AD07BA06B6F615DF697" xlink:type="arc" />
  </presentationLink>
  <presentationLink xlink:role="http://www.aligntech.com/role/GoodwillAndLongLivedAssetsImpairmentOfGoodwillDetails" xlink:type="extended">
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_GoodwillAndIntangibleAssetImpairmentAbstract" xlink:label="loc_us-gaap_GoodwillAndIntangibleAssetImpairmentAbstract_B6EB5E667DFF01E1E640FBABA39EA8AC" xlink:type="locator" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_ScheduleOfGoodwillTable" xlink:label="loc_us-gaap_ScheduleOfGoodwillTable_AAB3298CE2066D8BE68DFBABA39E5042" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_GoodwillAndIntangibleAssetImpairmentAbstract_B6EB5E667DFF01E1E640FBABA39EA8AC" xlink:to="loc_us-gaap_ScheduleOfGoodwillTable_AAB3298CE2066D8BE68DFBABA39E5042" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_BalanceSheetLocationAxis" xlink:label="loc_us-gaap_BalanceSheetLocationAxis_F7C79DBB31F0863C8FA3FBABA39F61AD" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ScheduleOfGoodwillTable_AAB3298CE2066D8BE68DFBABA39E5042" xlink:to="loc_us-gaap_BalanceSheetLocationAxis_F7C79DBB31F0863C8FA3FBABA39F61AD" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_BalanceSheetLocationDomain" xlink:label="loc_us-gaap_BalanceSheetLocationDomain_172DBD92B940334F9920FBABA39FD959" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_BalanceSheetLocationAxis_F7C79DBB31F0863C8FA3FBABA39F61AD" xlink:to="loc_us-gaap_BalanceSheetLocationDomain_172DBD92B940334F9920FBABA39FD959" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_StatementBusinessSegmentsAxis" xlink:label="loc_us-gaap_StatementBusinessSegmentsAxis_F0F49779D659F2B9B36AFBABA39FD373" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ScheduleOfGoodwillTable_AAB3298CE2066D8BE68DFBABA39E5042" xlink:to="loc_us-gaap_StatementBusinessSegmentsAxis_F0F49779D659F2B9B36AFBABA39FD373" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_SegmentDomain" xlink:label="loc_us-gaap_SegmentDomain_A670619D8D24AB0CFEE7FBABA39FBE17" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_F0F49779D659F2B9B36AFBABA39FD373" xlink:to="loc_us-gaap_SegmentDomain_A670619D8D24AB0CFEE7FBABA39FBE17" xlink:type="arc" />
    <loc xlink:href="algn-20150331.xsd#algn_ScannersAndCadcamMember" xlink:label="loc_algn_ScannersAndCadcamMember_550D9FCD2E7733B1AE66FBABA39F1063" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_SegmentDomain_A670619D8D24AB0CFEE7FBABA39FBE17" xlink:to="loc_algn_ScannersAndCadcamMember_550D9FCD2E7733B1AE66FBABA39F1063" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_GoodwillLineItems" xlink:label="loc_us-gaap_GoodwillLineItems_EF3CF2C44CB3F80EAB52FBABA39F730D" xlink:type="locator" />
    <presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ScheduleOfGoodwillTable_AAB3298CE2066D8BE68DFBABA39E5042" xlink:to="loc_us-gaap_GoodwillLineItems_EF3CF2C44CB3F80EAB52FBABA39F730D" xlink:type="arc" />
  </presentationLink>
  <presentationLink xlink:role="http://www.aligntech.com/role/GoodwillAndLongLivedAssetsNarrativeDetails" xlink:type="extended">
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_GoodwillAndIntangibleAssetsDisclosureAbstract" xlink:label="loc_us-gaap_GoodwillAndIntangibleAssetsDisclosureAbstract_52BC3C052D1A6C921D6EFB9CACA42262" xlink:type="locator" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_ScheduleOfGoodwillTable" xlink:label="loc_us-gaap_ScheduleOfGoodwillTable_EC148033025AD4C7334DFB9EA58C7B7F" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_GoodwillAndIntangibleAssetsDisclosureAbstract_52BC3C052D1A6C921D6EFB9CACA42262" xlink:to="loc_us-gaap_ScheduleOfGoodwillTable_EC148033025AD4C7334DFB9EA58C7B7F" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_BusinessAcquisitionAxis" xlink:label="loc_us-gaap_BusinessAcquisitionAxis_A1769FA5DCAA32D71583FB9F12DBE4CE" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ScheduleOfGoodwillTable_EC148033025AD4C7334DFB9EA58C7B7F" xlink:to="loc_us-gaap_BusinessAcquisitionAxis_A1769FA5DCAA32D71583FB9F12DBE4CE" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_BusinessAcquisitionAcquireeDomain" xlink:label="loc_us-gaap_BusinessAcquisitionAcquireeDomain_8189866C8C3E097D3F16FB9F12EF1567" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_BusinessAcquisitionAxis_A1769FA5DCAA32D71583FB9F12DBE4CE" xlink:to="loc_us-gaap_BusinessAcquisitionAcquireeDomain_8189866C8C3E097D3F16FB9F12EF1567" xlink:type="arc" />
    <loc xlink:href="algn-20150331.xsd#algn_CadentHoldingsInc.Member" xlink:label="loc_algn_CadentHoldingsInc.Member_D92E9F1C46E4740CEFDEFB9F9C97C13B" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_BusinessAcquisitionAcquireeDomain_8189866C8C3E097D3F16FB9F12EF1567" xlink:to="loc_algn_CadentHoldingsInc.Member_D92E9F1C46E4740CEFDEFB9F9C97C13B" xlink:type="arc" />
    <loc xlink:href="algn-20150331.xsd#algn_IcaHoldingsPtyLimitedMember" xlink:label="loc_algn_IcaHoldingsPtyLimitedMember_29C2E66BCC2E47D93B13FB9F33BCDCC8" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_BusinessAcquisitionAcquireeDomain_8189866C8C3E097D3F16FB9F12EF1567" xlink:to="loc_algn_IcaHoldingsPtyLimitedMember_29C2E66BCC2E47D93B13FB9F33BCDCC8" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_StatementBusinessSegmentsAxis" xlink:label="loc_us-gaap_StatementBusinessSegmentsAxis_493CE08D5DFCB389A3AAFB9EA58C6CB5" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ScheduleOfGoodwillTable_EC148033025AD4C7334DFB9EA58C7B7F" xlink:to="loc_us-gaap_StatementBusinessSegmentsAxis_493CE08D5DFCB389A3AAFB9EA58C6CB5" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_SegmentDomain" xlink:label="loc_us-gaap_SegmentDomain_0956219D58C7C2701061FB9EA58C3BFE" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_493CE08D5DFCB389A3AAFB9EA58C6CB5" xlink:to="loc_us-gaap_SegmentDomain_0956219D58C7C2701061FB9EA58C3BFE" xlink:type="arc" />
    <loc xlink:href="algn-20150331.xsd#algn_ClearAlignerMember" xlink:label="loc_algn_ClearAlignerMember_3A54031713DF9E91988BFB9EE35FE60B" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_SegmentDomain_0956219D58C7C2701061FB9EA58C3BFE" xlink:to="loc_algn_ClearAlignerMember_3A54031713DF9E91988BFB9EE35FE60B" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_GoodwillLineItems" xlink:label="loc_us-gaap_GoodwillLineItems_99FF92F399B92BB9ACBEFB9EA58C3871" xlink:type="locator" />
    <presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ScheduleOfGoodwillTable_EC148033025AD4C7334DFB9EA58C7B7F" xlink:to="loc_us-gaap_GoodwillLineItems_99FF92F399B92BB9ACBEFB9EA58C3871" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_GoodwillAcquiredDuringPeriod" xlink:label="loc_us-gaap_GoodwillAcquiredDuringPeriod_91768DE885DF81EEF626FB9D431D37E5" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_GoodwillLineItems_99FF92F399B92BB9ACBEFB9EA58C3871" xlink:to="loc_us-gaap_GoodwillAcquiredDuringPeriod_91768DE885DF81EEF626FB9D431D37E5" xlink:type="arc" />
  </presentationLink>
  <presentationLink xlink:role="http://www.aligntech.com/role/GoodwillAndLongLivedAssetsTables" xlink:type="extended">
    <loc xlink:href="algn-20150331.xsd#algn_NotesToFinancialStatementsAbstract" xlink:label="loc_algn_NotesToFinancialStatementsAbstract_CF606BAB87D99B7DABCD6B6F61B1BD0F" xlink:type="locator" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_ScheduleOfGoodwillTextBlock" xlink:label="loc_us-gaap_ScheduleOfGoodwillTextBlock_A9EA481BD1130C4A749C6B6F61B1EBA3" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_algn_NotesToFinancialStatementsAbstract_CF606BAB87D99B7DABCD6B6F61B1BD0F" xlink:to="loc_us-gaap_ScheduleOfGoodwillTextBlock_A9EA481BD1130C4A749C6B6F61B1EBA3" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_ScheduleOfFiniteLivedIntangibleAssetsTableTextBlock" xlink:label="loc_us-gaap_ScheduleOfFiniteLivedIntangibleAssetsTableTextBlock_0F353932118A0C8859BB6B6F61B11772" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_algn_NotesToFinancialStatementsAbstract_CF606BAB87D99B7DABCD6B6F61B1BD0F" xlink:to="loc_us-gaap_ScheduleOfFiniteLivedIntangibleAssetsTableTextBlock_0F353932118A0C8859BB6B6F61B11772" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_ScheduleofFiniteLivedIntangibleAssetsFutureAmortizationExpenseTableTextBlock" xlink:label="loc_us-gaap_ScheduleofFiniteLivedIntangibleAssetsFutureAmortizationExpenseTableTextBlock_2B395ADEDF4427E8830D6B6F61B198D1" xlink:type="locator" />
    <presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_algn_NotesToFinancialStatementsAbstract_CF606BAB87D99B7DABCD6B6F61B1BD0F" xlink:to="loc_us-gaap_ScheduleofFiniteLivedIntangibleAssetsFutureAmortizationExpenseTableTextBlock_2B395ADEDF4427E8830D6B6F61B198D1" xlink:type="arc" />
  </presentationLink>
  <presentationLink xlink:role="http://www.aligntech.com/role/IntangibleAssetsAsDirectResultFromCadentAcquisitionDetails" xlink:type="extended">
    <loc xlink:href="algn-20150331.xsd#algn_DisclosureIntangibleAssetsAsDirectResultFromCadentAcquisitionAbstract" xlink:label="loc_algn_DisclosureIntangibleAssetsAsDirectResultFromCadentAcquisitionAbstract_F6FA1BB8D280BE46461A6B6F6166ABB2" xlink:type="locator" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_ScheduleOfFiniteLivedIntangibleAssetsTable" xlink:label="loc_us-gaap_ScheduleOfFiniteLivedIntangibleAssetsTable_6271341AF13E6E99BC4F6B6F61661310" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_algn_DisclosureIntangibleAssetsAsDirectResultFromCadentAcquisitionAbstract_F6FA1BB8D280BE46461A6B6F6166ABB2" xlink:to="loc_us-gaap_ScheduleOfFiniteLivedIntangibleAssetsTable_6271341AF13E6E99BC4F6B6F61661310" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_2A328C4311F6420A783D6B6F616614AA" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ScheduleOfFiniteLivedIntangibleAssetsTable_6271341AF13E6E99BC4F6B6F61661310" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_2A328C4311F6420A783D6B6F616614AA" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_27B4E1316ED9742F69516B6F616625A5" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_2A328C4311F6420A783D6B6F616614AA" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_27B4E1316ED9742F69516B6F616625A5" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_TrademarksMember" xlink:label="loc_us-gaap_TrademarksMember_44770660A553364E1A426B6F61669358" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_27B4E1316ED9742F69516B6F616625A5" xlink:to="loc_us-gaap_TrademarksMember_44770660A553364E1A426B6F61669358" xlink:type="arc" />
    <loc xlink:href="algn-20150331.xsd#algn_ExistingTechnologyMember" xlink:label="loc_algn_ExistingTechnologyMember_83C5648634417663810F6B6F61662883" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_27B4E1316ED9742F69516B6F616625A5" xlink:to="loc_algn_ExistingTechnologyMember_83C5648634417663810F6B6F61662883" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_CustomerRelationshipsMember" xlink:label="loc_us-gaap_CustomerRelationshipsMember_5694B157A0B41ED99F0C6B6F61660926" xlink:type="locator" />
    <presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_27B4E1316ED9742F69516B6F616625A5" xlink:to="loc_us-gaap_CustomerRelationshipsMember_5694B157A0B41ED99F0C6B6F61660926" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_OtherIntangibleAssetsMember" xlink:label="loc_us-gaap_OtherIntangibleAssetsMember_61C8F44F774D4AC092D06B6F6167A557" xlink:type="locator" />
    <presentationArc order="4" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_27B4E1316ED9742F69516B6F616625A5" xlink:to="loc_us-gaap_OtherIntangibleAssetsMember_61C8F44F774D4AC092D06B6F6167A557" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsLineItems" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsLineItems_50D5EE65AF32186C13966B6F61675A76" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ScheduleOfFiniteLivedIntangibleAssetsTable_6271341AF13E6E99BC4F6B6F61661310" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsLineItems_50D5EE65AF32186C13966B6F61675A76" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_AcquiredFiniteLivedIntangibleAssetsWeightedAverageUsefulLife" xlink:label="loc_us-gaap_AcquiredFiniteLivedIntangibleAssetsWeightedAverageUsefulLife_AAAD9D003E47695A20B26B6F61674383" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsLineItems_50D5EE65AF32186C13966B6F61675A76" xlink:to="loc_us-gaap_AcquiredFiniteLivedIntangibleAssetsWeightedAverageUsefulLife_AAAD9D003E47695A20B26B6F61674383" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsGross" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsGross_A2471195E7B06D816EC26B6F616777F3" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsLineItems_50D5EE65AF32186C13966B6F61675A76" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsGross_A2471195E7B06D816EC26B6F616777F3" xlink:type="arc" />
    <loc xlink:href="algn-20150331.xsd#algn_FiniteLivedIntangibleAssetsAccumulatedAmortizationPeriodIncreaseDecrease" xlink:label="loc_algn_FiniteLivedIntangibleAssetsAccumulatedAmortizationPeriodIncreaseDecrease_84A6663E4C08B4B6880F6B6F616754F2" xlink:type="locator" />
    <presentationArc order="3" preferredLabel="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsLineItems_50D5EE65AF32186C13966B6F61675A76" xlink:to="loc_algn_FiniteLivedIntangibleAssetsAccumulatedAmortizationPeriodIncreaseDecrease_84A6663E4C08B4B6880F6B6F616754F2" xlink:type="arc" />
    <loc xlink:href="algn-20150331.xsd#algn_FiniteLivedIntangibleAssetsAccumulatedImpairmentLoss" xlink:label="loc_algn_FiniteLivedIntangibleAssetsAccumulatedImpairmentLoss_EDDF952D0A7BBDE2E9136B6F61675772" xlink:type="locator" />
    <presentationArc order="4" preferredLabel="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsLineItems_50D5EE65AF32186C13966B6F61675A76" xlink:to="loc_algn_FiniteLivedIntangibleAssetsAccumulatedImpairmentLoss_EDDF952D0A7BBDE2E9136B6F61675772" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsNet" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsNet_7F1CCA4048894346AD3F6B6F61678397" xlink:type="locator" />
    <presentationArc order="5" preferredLabel="http://www.xbrl.org/2003/role/totalLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsLineItems_50D5EE65AF32186C13966B6F61675A76" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsNet_7F1CCA4048894346AD3F6B6F61678397" xlink:type="arc" />
  </presentationLink>
  <presentationLink xlink:role="http://www.aligntech.com/role/InventoriesDetails" xlink:type="extended">
    <loc xlink:href="algn-20150331.xsd#algn_DisclosureInventoriesAbstract" xlink:label="loc_algn_DisclosureInventoriesAbstract_85CF4781AED702D839806B6F61B399B1" xlink:type="locator" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_InventoryRawMaterialsNetOfReserves" xlink:label="loc_us-gaap_InventoryRawMaterialsNetOfReserves_7457CF414B25A8FBBB3B6B6F61B379BD" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_algn_DisclosureInventoriesAbstract_85CF4781AED702D839806B6F61B399B1" xlink:to="loc_us-gaap_InventoryRawMaterialsNetOfReserves_7457CF414B25A8FBBB3B6B6F61B379BD" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_InventoryWorkInProcessNetOfReserves" xlink:label="loc_us-gaap_InventoryWorkInProcessNetOfReserves_BF612FA758400BC811F16B6F61B3CC8A" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_algn_DisclosureInventoriesAbstract_85CF4781AED702D839806B6F61B399B1" xlink:to="loc_us-gaap_InventoryWorkInProcessNetOfReserves_BF612FA758400BC811F16B6F61B3CC8A" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_InventoryFinishedGoodsNetOfReserves" xlink:label="loc_us-gaap_InventoryFinishedGoodsNetOfReserves_D71BF677E0ED4144BEA06B6F61B4B778" xlink:type="locator" />
    <presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_algn_DisclosureInventoriesAbstract_85CF4781AED702D839806B6F61B399B1" xlink:to="loc_us-gaap_InventoryFinishedGoodsNetOfReserves_D71BF677E0ED4144BEA06B6F61B4B778" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_InventoryNet" xlink:label="loc_us-gaap_InventoryNet_41A2BC83C157BF2493406B6F61B43F92" xlink:type="locator" />
    <presentationArc order="4" preferredLabel="http://www.xbrl.org/2003/role/totalLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_algn_DisclosureInventoriesAbstract_85CF4781AED702D839806B6F61B399B1" xlink:to="loc_us-gaap_InventoryNet_41A2BC83C157BF2493406B6F61B43F92" xlink:type="arc" />
  </presentationLink>
  <presentationLink xlink:role="http://www.aligntech.com/role/LegalProceedingsNotes" xlink:type="extended">
    <loc xlink:href="algn-20150331.xsd#algn_LegalProceedingsAbstract" xlink:label="loc_algn_LegalProceedingsAbstract_49BA166B7E1121ACCD636B6F6197ABA2" xlink:type="locator" />
    <loc xlink:href="algn-20150331.xsd#algn_LegalProceedingsTextBlock" xlink:label="loc_algn_LegalProceedingsTextBlock_BDC013D89D12D5C185EC6B6F6197BD5B" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_algn_LegalProceedingsAbstract_49BA166B7E1121ACCD636B6F6197ABA2" xlink:to="loc_algn_LegalProceedingsTextBlock_BDC013D89D12D5C185EC6B6F6197BD5B" xlink:type="arc" />
  </presentationLink>
  <presentationLink xlink:role="http://www.aligntech.com/role/LongLivedAssetsByGeographicAreaDetails" xlink:type="extended">
    <loc xlink:href="algn-20150331.xsd#algn_DisclosureLongLivedAssetsByGeographicAreaAbstract" xlink:label="loc_algn_DisclosureLongLivedAssetsByGeographicAreaAbstract_919C821DD456B5D20D916B6F60FE06A4" xlink:type="locator" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable" xlink:label="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_CD5B53F484B9F9D099DF6B6F60FEA3C5" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_algn_DisclosureLongLivedAssetsByGeographicAreaAbstract_919C821DD456B5D20D916B6F60FE06A4" xlink:to="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_CD5B53F484B9F9D099DF6B6F60FEA3C5" xlink:type="arc" />
    <loc xlink:href="http://xbrl.sec.gov/dei/2014/dei-2014-01-31.xsd#dei_LegalEntityAxis" xlink:label="loc_dei_LegalEntityAxis_EA08F116F99B18C3C9FF6B6F60FEB376" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_CD5B53F484B9F9D099DF6B6F60FEA3C5" xlink:to="loc_dei_LegalEntityAxis_EA08F116F99B18C3C9FF6B6F60FEB376" xlink:type="arc" />
    <loc xlink:href="http://xbrl.sec.gov/dei/2014/dei-2014-01-31.xsd#dei_EntityDomain" xlink:label="loc_dei_EntityDomain_E06189486E783B7BEA3E6B6F60FECB03" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_LegalEntityAxis_EA08F116F99B18C3C9FF6B6F60FEB376" xlink:to="loc_dei_EntityDomain_E06189486E783B7BEA3E6B6F60FECB03" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_StatementGeographicalAxis" xlink:label="loc_us-gaap_StatementGeographicalAxis_7D1C924DA79F2025FCB86B6F60FEF696" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_CD5B53F484B9F9D099DF6B6F60FEA3C5" xlink:to="loc_us-gaap_StatementGeographicalAxis_7D1C924DA79F2025FCB86B6F60FEF696" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_SegmentGeographicalDomain" xlink:label="loc_us-gaap_SegmentGeographicalDomain_F83709C30DC3AD8432636B6F60FEB2E1" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_StatementGeographicalAxis_7D1C924DA79F2025FCB86B6F60FEF696" xlink:to="loc_us-gaap_SegmentGeographicalDomain_F83709C30DC3AD8432636B6F60FEB2E1" xlink:type="arc" />
    <loc xlink:href="http://xbrl.sec.gov/country/2013/country-2013-01-31.xsd#country_US" xlink:label="loc_country_US_5C4EB2A702A1917BF3D56B6F60FE2CEC" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_SegmentGeographicalDomain_F83709C30DC3AD8432636B6F60FEB2E1" xlink:to="loc_country_US_5C4EB2A702A1917BF3D56B6F60FE2CEC" xlink:type="arc" />
    <loc xlink:href="http://xbrl.sec.gov/country/2013/country-2013-01-31.xsd#country_MX" xlink:label="loc_country_MX_6660A47A57D07E0FF9D36B6F60FEACAA" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_SegmentGeographicalDomain_F83709C30DC3AD8432636B6F60FEB2E1" xlink:to="loc_country_MX_6660A47A57D07E0FF9D36B6F60FEACAA" xlink:type="arc" />
    <loc xlink:href="http://xbrl.sec.gov/country/2013/country-2013-01-31.xsd#country_NL" xlink:label="loc_country_NL_04378FA06BEF03130E2C6B6F60FE2F38" xlink:type="locator" />
    <presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_SegmentGeographicalDomain_F83709C30DC3AD8432636B6F60FEB2E1" xlink:to="loc_country_NL_04378FA06BEF03130E2C6B6F60FE2F38" xlink:type="arc" />
    <loc xlink:href="algn-20150331.xsd#algn_OtherInternationalMember" xlink:label="loc_algn_OtherInternationalMember_265503E4B2425BEA66196B6F60FEADD8" xlink:type="locator" />
    <presentationArc order="4" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_SegmentGeographicalDomain_F83709C30DC3AD8432636B6F60FEB2E1" xlink:to="loc_algn_OtherInternationalMember_265503E4B2425BEA66196B6F60FEADD8" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_SegmentReportingInformationLineItems" xlink:label="loc_us-gaap_SegmentReportingInformationLineItems_0031135F00E302D9A0476B6F60FFA791" xlink:type="locator" />
    <presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_CD5B53F484B9F9D099DF6B6F60FEA3C5" xlink:to="loc_us-gaap_SegmentReportingInformationLineItems_0031135F00E302D9A0476B6F60FFA791" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_NoncurrentAssets" xlink:label="loc_us-gaap_NoncurrentAssets_CC0BF8CC52E98D39E3F06B6F60FF1069" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_0031135F00E302D9A0476B6F60FFA791" xlink:to="loc_us-gaap_NoncurrentAssets_CC0BF8CC52E98D39E3F06B6F60FF1069" xlink:type="arc" />
  </presentationLink>
  <presentationLink xlink:role="http://www.aligntech.com/role/MarketableSecuritiesAndFairValueMeasurements" xlink:type="extended">
    <loc xlink:href="algn-20150331.xsd#algn_NotesToFinancialStatementsAbstract" xlink:label="loc_algn_NotesToFinancialStatementsAbstract_D9F081431A975126B5DC6B6F61397717" xlink:type="locator" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_FinancialInstrumentsDisclosureTextBlock" xlink:label="loc_us-gaap_FinancialInstrumentsDisclosureTextBlock_529AFADBE50E339EE9B66B6F613984A4" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_algn_NotesToFinancialStatementsAbstract_D9F081431A975126B5DC6B6F61397717" xlink:to="loc_us-gaap_FinancialInstrumentsDisclosureTextBlock_529AFADBE50E339EE9B66B6F613984A4" xlink:type="arc" />
  </presentationLink>
  <presentationLink xlink:role="http://www.aligntech.com/role/MarketableSecuritiesAndFairValueMeasurementsAdditionalInformationDetails" xlink:type="extended">
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_InvestmentsDebtAndEquitySecuritiesAbstract" xlink:label="loc_us-gaap_InvestmentsDebtAndEquitySecuritiesAbstract_17A1548A54775D5F8085FBABA3CB7248" xlink:type="locator" />
    <loc xlink:href="algn-20150331.xsd#algn_MaturityPeriodUsedToClassifyInvestments" xlink:label="loc_algn_MaturityPeriodUsedToClassifyInvestments_999996B556DAF39C21AFFBABA3CBFF42" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_InvestmentsDebtAndEquitySecuritiesAbstract_17A1548A54775D5F8085FBABA3CB7248" xlink:to="loc_algn_MaturityPeriodUsedToClassifyInvestments_999996B556DAF39C21AFFBABA3CBFF42" xlink:type="arc" />
    <loc xlink:href="algn-20150331.xsd#algn_MarketableSecuritiesWeightedAverageRemainingMaturity" xlink:label="loc_algn_MarketableSecuritiesWeightedAverageRemainingMaturity_18506D6D2DC8CEE48DE5FBABA3CB2801" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_InvestmentsDebtAndEquitySecuritiesAbstract_17A1548A54775D5F8085FBABA3CB7248" xlink:to="loc_algn_MarketableSecuritiesWeightedAverageRemainingMaturity_18506D6D2DC8CEE48DE5FBABA3CB2801" xlink:type="arc" />
  </presentationLink>
  <presentationLink xlink:role="http://www.aligntech.com/role/MarketableSecuritiesAndFairValueMeasurementsAvailableForSaleSecuritiesDetails" xlink:type="extended">
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_InvestmentsDebtAndEquitySecuritiesAbstract" xlink:label="loc_us-gaap_InvestmentsDebtAndEquitySecuritiesAbstract_3826111122CD0E37BD396B6F619DC2B0" xlink:type="locator" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_AvailableForSaleSecuritiesCurrent" xlink:label="loc_us-gaap_AvailableForSaleSecuritiesCurrent_B2D4578459431413EC746B6F619DE409" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_InvestmentsDebtAndEquitySecuritiesAbstract_3826111122CD0E37BD396B6F619DC2B0" xlink:to="loc_us-gaap_AvailableForSaleSecuritiesCurrent_B2D4578459431413EC746B6F619DE409" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_AvailableForSaleSecuritiesNoncurrent" xlink:label="loc_us-gaap_AvailableForSaleSecuritiesNoncurrent_44E620D2DE9340E0601C6B6F619D5B6C" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_InvestmentsDebtAndEquitySecuritiesAbstract_3826111122CD0E37BD396B6F619DC2B0" xlink:to="loc_us-gaap_AvailableForSaleSecuritiesNoncurrent_44E620D2DE9340E0601C6B6F619D5B6C" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_AvailableForSaleSecurities" xlink:label="loc_us-gaap_AvailableForSaleSecurities_436F8BD69705D12FC4756B6F619D7102" xlink:type="locator" />
    <presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/totalLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_InvestmentsDebtAndEquitySecuritiesAbstract_3826111122CD0E37BD396B6F619DC2B0" xlink:to="loc_us-gaap_AvailableForSaleSecurities_436F8BD69705D12FC4756B6F619D7102" xlink:type="arc" />
  </presentationLink>
  <presentationLink xlink:role="http://www.aligntech.com/role/MarketableSecuritiesAndFairValueMeasurementsTables" xlink:type="extended">
    <loc xlink:href="algn-20150331.xsd#algn_NotesToFinancialStatementsAbstract" xlink:label="loc_algn_NotesToFinancialStatementsAbstract_2DA93E2B6C86EF2C31366B6F617E3862" xlink:type="locator" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_AvailableForSaleSecuritiesTextBlock" xlink:label="loc_us-gaap_AvailableForSaleSecuritiesTextBlock_91974A1CEBA37F2D0DE06B6F617F0A89" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_algn_NotesToFinancialStatementsAbstract_2DA93E2B6C86EF2C31366B6F617E3862" xlink:to="loc_us-gaap_AvailableForSaleSecuritiesTextBlock_91974A1CEBA37F2D0DE06B6F617F0A89" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_InvestmentsClassifiedByContractualMaturityDateTableTextBlock" xlink:label="loc_us-gaap_InvestmentsClassifiedByContractualMaturityDateTableTextBlock_911193CC7DD4ED1473376B6F617F8EE7" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_algn_NotesToFinancialStatementsAbstract_2DA93E2B6C86EF2C31366B6F617E3862" xlink:to="loc_us-gaap_InvestmentsClassifiedByContractualMaturityDateTableTextBlock_911193CC7DD4ED1473376B6F617F8EE7" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_FairValueAssetsMeasuredOnRecurringBasisTextBlock" xlink:label="loc_us-gaap_FairValueAssetsMeasuredOnRecurringBasisTextBlock_F25DED3F840B96D23F6B6B6F617FC384" xlink:type="locator" />
    <presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_algn_NotesToFinancialStatementsAbstract_2DA93E2B6C86EF2C31366B6F617E3862" xlink:to="loc_us-gaap_FairValueAssetsMeasuredOnRecurringBasisTextBlock_F25DED3F840B96D23F6B6B6F617FC384" xlink:type="arc" />
  </presentationLink>
  <presentationLink xlink:role="http://www.aligntech.com/role/MinimumFutureLeasePaymentsForNonCancelableLeasesDetails" xlink:type="extended">
    <loc xlink:href="algn-20150331.xsd#algn_DisclosureMinimumFutureLeasePaymentsForNonCancelableLeasesAbstract" xlink:label="loc_algn_DisclosureMinimumFutureLeasePaymentsForNonCancelableLeasesAbstract_70B54A2BABFBD0A5F69F6B71CCD47DDE" xlink:type="locator" />
    <loc xlink:href="algn-20150331.xsd#algn_OperatingLeasesFutureMinimumPaymentsDueRemainderOfPeriod" xlink:label="loc_algn_OperatingLeasesFutureMinimumPaymentsDueRemainderOfPeriod_3328DFF270EDCC5231DA6B71CCD4B2A3" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_algn_DisclosureMinimumFutureLeasePaymentsForNonCancelableLeasesAbstract_70B54A2BABFBD0A5F69F6B71CCD47DDE" xlink:to="loc_algn_OperatingLeasesFutureMinimumPaymentsDueRemainderOfPeriod_3328DFF270EDCC5231DA6B71CCD4B2A3" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_OperatingLeasesFutureMinimumPaymentsDueInTwoYears" xlink:label="loc_us-gaap_OperatingLeasesFutureMinimumPaymentsDueInTwoYears_C76D31257FCE05A7CDA76B71CCD54494" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_algn_DisclosureMinimumFutureLeasePaymentsForNonCancelableLeasesAbstract_70B54A2BABFBD0A5F69F6B71CCD47DDE" xlink:to="loc_us-gaap_OperatingLeasesFutureMinimumPaymentsDueInTwoYears_C76D31257FCE05A7CDA76B71CCD54494" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_OperatingLeasesFutureMinimumPaymentsDueInThreeYears" xlink:label="loc_us-gaap_OperatingLeasesFutureMinimumPaymentsDueInThreeYears_5A879CF0C455B04F9AC56B71CCD57E40" xlink:type="locator" />
    <presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_algn_DisclosureMinimumFutureLeasePaymentsForNonCancelableLeasesAbstract_70B54A2BABFBD0A5F69F6B71CCD47DDE" xlink:to="loc_us-gaap_OperatingLeasesFutureMinimumPaymentsDueInThreeYears_5A879CF0C455B04F9AC56B71CCD57E40" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_OperatingLeasesFutureMinimumPaymentsDueInFourYears" xlink:label="loc_us-gaap_OperatingLeasesFutureMinimumPaymentsDueInFourYears_A28AC5F93BF62F9573E96B71CCD52E7E" xlink:type="locator" />
    <presentationArc order="4" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_algn_DisclosureMinimumFutureLeasePaymentsForNonCancelableLeasesAbstract_70B54A2BABFBD0A5F69F6B71CCD47DDE" xlink:to="loc_us-gaap_OperatingLeasesFutureMinimumPaymentsDueInFourYears_A28AC5F93BF62F9573E96B71CCD52E7E" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_OperatingLeasesFutureMinimumPaymentsDueInFiveYears" xlink:label="loc_us-gaap_OperatingLeasesFutureMinimumPaymentsDueInFiveYears_7B9F6FA915B5F0441DD16B71CCD5023C" xlink:type="locator" />
    <presentationArc order="5" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_algn_DisclosureMinimumFutureLeasePaymentsForNonCancelableLeasesAbstract_70B54A2BABFBD0A5F69F6B71CCD47DDE" xlink:to="loc_us-gaap_OperatingLeasesFutureMinimumPaymentsDueInFiveYears_7B9F6FA915B5F0441DD16B71CCD5023C" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_OperatingLeasesFutureMinimumPaymentsDueThereafter" xlink:label="loc_us-gaap_OperatingLeasesFutureMinimumPaymentsDueThereafter_E98AB180481FBEBE12796B71CCD5C9A3" xlink:type="locator" />
    <presentationArc order="6" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_algn_DisclosureMinimumFutureLeasePaymentsForNonCancelableLeasesAbstract_70B54A2BABFBD0A5F69F6B71CCD47DDE" xlink:to="loc_us-gaap_OperatingLeasesFutureMinimumPaymentsDueThereafter_E98AB180481FBEBE12796B71CCD5C9A3" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_OperatingLeasesFutureMinimumPaymentsDue" xlink:label="loc_us-gaap_OperatingLeasesFutureMinimumPaymentsDue_6599D2214E52142FFCBA6B71CCD5BCE0" xlink:type="locator" />
    <presentationArc order="7" preferredLabel="http://www.xbrl.org/2003/role/totalLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_algn_DisclosureMinimumFutureLeasePaymentsForNonCancelableLeasesAbstract_70B54A2BABFBD0A5F69F6B71CCD47DDE" xlink:to="loc_us-gaap_OperatingLeasesFutureMinimumPaymentsDue_6599D2214E52142FFCBA6B71CCD5BCE0" xlink:type="arc" />
  </presentationLink>
  <presentationLink xlink:role="http://www.aligntech.com/role/NetProfitPerShare" xlink:type="extended">
    <loc xlink:href="algn-20150331.xsd#algn_NotesToFinancialStatementsAbstract" xlink:label="loc_algn_NotesToFinancialStatementsAbstract_555C664E05F8AA6F52B16B6F60F59918" xlink:type="locator" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_StatementTable" xlink:label="loc_us-gaap_StatementTable_6A2B7F4AFAE10C8C4F906B6F60F5E472" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_algn_NotesToFinancialStatementsAbstract_555C664E05F8AA6F52B16B6F60F59918" xlink:to="loc_us-gaap_StatementTable_6A2B7F4AFAE10C8C4F906B6F60F5E472" xlink:type="arc" />
    <loc xlink:href="http://xbrl.sec.gov/dei/2014/dei-2014-01-31.xsd#dei_LegalEntityAxis" xlink:label="loc_dei_LegalEntityAxis_13FED6BA99E8843C88116B6F60F536C3" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_StatementTable_6A2B7F4AFAE10C8C4F906B6F60F5E472" xlink:to="loc_dei_LegalEntityAxis_13FED6BA99E8843C88116B6F60F536C3" xlink:type="arc" />
    <loc xlink:href="http://xbrl.sec.gov/dei/2014/dei-2014-01-31.xsd#dei_EntityDomain" xlink:label="loc_dei_EntityDomain_135908DA85B74BD6FB4A6B6F60F5A3CF" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_LegalEntityAxis_13FED6BA99E8843C88116B6F60F536C3" xlink:to="loc_dei_EntityDomain_135908DA85B74BD6FB4A6B6F60F5A3CF" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_StatementLineItems" xlink:label="loc_us-gaap_StatementLineItems_A07E92223DAE0601873C6B6F60F5EC14" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_StatementTable_6A2B7F4AFAE10C8C4F906B6F60F5E472" xlink:to="loc_us-gaap_StatementLineItems_A07E92223DAE0601873C6B6F60F5EC14" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_EarningsPerShareTextBlock" xlink:label="loc_us-gaap_EarningsPerShareTextBlock_A0BECB0C12897ADC371B6B6F60F507BA" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_StatementLineItems_A07E92223DAE0601873C6B6F60F5EC14" xlink:to="loc_us-gaap_EarningsPerShareTextBlock_A0BECB0C12897ADC371B6B6F60F507BA" xlink:type="arc" />
  </presentationLink>
  <presentationLink xlink:role="http://www.aligntech.com/role/NetProfitPerShareTables" xlink:type="extended">
    <loc xlink:href="algn-20150331.xsd#algn_NotesToFinancialStatementsAbstract" xlink:label="loc_algn_NotesToFinancialStatementsAbstract_C8FBCF285A17794CB8A36B6F61347BAC" xlink:type="locator" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_StatementTable" xlink:label="loc_us-gaap_StatementTable_5F35961F335A5A06FD0C6B6F6134400D" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_algn_NotesToFinancialStatementsAbstract_C8FBCF285A17794CB8A36B6F61347BAC" xlink:to="loc_us-gaap_StatementTable_5F35961F335A5A06FD0C6B6F6134400D" xlink:type="arc" />
    <loc xlink:href="http://xbrl.sec.gov/dei/2014/dei-2014-01-31.xsd#dei_LegalEntityAxis" xlink:label="loc_dei_LegalEntityAxis_27879181EF8CE72D81B76B6F6134085C" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_StatementTable_5F35961F335A5A06FD0C6B6F6134400D" xlink:to="loc_dei_LegalEntityAxis_27879181EF8CE72D81B76B6F6134085C" xlink:type="arc" />
    <loc xlink:href="http://xbrl.sec.gov/dei/2014/dei-2014-01-31.xsd#dei_EntityDomain" xlink:label="loc_dei_EntityDomain_F136DC4338134D994D6E6B6F6134EB94" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_LegalEntityAxis_27879181EF8CE72D81B76B6F6134085C" xlink:to="loc_dei_EntityDomain_F136DC4338134D994D6E6B6F6134EB94" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_StatementLineItems" xlink:label="loc_us-gaap_StatementLineItems_DF424D4E8A7B2C5DD9036B6F6134354C" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_StatementTable_5F35961F335A5A06FD0C6B6F6134400D" xlink:to="loc_us-gaap_StatementLineItems_DF424D4E8A7B2C5DD9036B6F6134354C" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_ScheduleOfEarningsPerShareBasicAndDilutedTableTextBlock" xlink:label="loc_us-gaap_ScheduleOfEarningsPerShareBasicAndDilutedTableTextBlock_EEF3C9BF8D75BA2C776E6B6F61341559" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_StatementLineItems_DF424D4E8A7B2C5DD9036B6F6134354C" xlink:to="loc_us-gaap_ScheduleOfEarningsPerShareBasicAndDilutedTableTextBlock_EEF3C9BF8D75BA2C776E6B6F61341559" xlink:type="arc" />
  </presentationLink>
  <presentationLink xlink:role="http://www.aligntech.com/role/NetRevenuesByGeographicAreaDetails" xlink:type="extended">
    <loc xlink:href="algn-20150331.xsd#algn_DisclosureNetRevenuesByGeographicAreaAbstract" xlink:label="loc_algn_DisclosureNetRevenuesByGeographicAreaAbstract_32AA82A4172E282F09BD6B6F616BD6C7" xlink:type="locator" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable" xlink:label="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_7DA13164ECC12390176E6B6F616B00FE" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_algn_DisclosureNetRevenuesByGeographicAreaAbstract_32AA82A4172E282F09BD6B6F616BD6C7" xlink:to="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_7DA13164ECC12390176E6B6F616B00FE" xlink:type="arc" />
    <loc xlink:href="http://xbrl.sec.gov/dei/2014/dei-2014-01-31.xsd#dei_LegalEntityAxis" xlink:label="loc_dei_LegalEntityAxis_F501EABB38F428F1F4DB6B6F616BF6F1" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_7DA13164ECC12390176E6B6F616B00FE" xlink:to="loc_dei_LegalEntityAxis_F501EABB38F428F1F4DB6B6F616BF6F1" xlink:type="arc" />
    <loc xlink:href="http://xbrl.sec.gov/dei/2014/dei-2014-01-31.xsd#dei_EntityDomain" xlink:label="loc_dei_EntityDomain_9C12105188D24B4DD3DD6B6F616C9A7E" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_LegalEntityAxis_F501EABB38F428F1F4DB6B6F616BF6F1" xlink:to="loc_dei_EntityDomain_9C12105188D24B4DD3DD6B6F616C9A7E" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_StatementGeographicalAxis" xlink:label="loc_us-gaap_StatementGeographicalAxis_1A907990563453EE65876B6F616C192B" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_7DA13164ECC12390176E6B6F616B00FE" xlink:to="loc_us-gaap_StatementGeographicalAxis_1A907990563453EE65876B6F616C192B" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_SegmentGeographicalDomain" xlink:label="loc_us-gaap_SegmentGeographicalDomain_394AC9E11C2E8C8994F96B6F616CD361" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_StatementGeographicalAxis_1A907990563453EE65876B6F616C192B" xlink:to="loc_us-gaap_SegmentGeographicalDomain_394AC9E11C2E8C8994F96B6F616CD361" xlink:type="arc" />
    <loc xlink:href="http://xbrl.sec.gov/country/2013/country-2013-01-31.xsd#country_US" xlink:label="loc_country_US_FC29B46033FA99D39DF96B6F616DA9EB" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_SegmentGeographicalDomain_394AC9E11C2E8C8994F96B6F616CD361" xlink:to="loc_country_US_FC29B46033FA99D39DF96B6F616DA9EB" xlink:type="arc" />
    <loc xlink:href="http://xbrl.sec.gov/country/2013/country-2013-01-31.xsd#country_NL" xlink:label="loc_country_NL_FA52753E744DFAA78AA16B6F616D771D" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_SegmentGeographicalDomain_394AC9E11C2E8C8994F96B6F616CD361" xlink:to="loc_country_NL_FA52753E744DFAA78AA16B6F616D771D" xlink:type="arc" />
    <loc xlink:href="algn-20150331.xsd#algn_OtherInternationalMember" xlink:label="loc_algn_OtherInternationalMember_8E8C2ABFEC9A43AE21F36B6F616DC8C2" xlink:type="locator" />
    <presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_SegmentGeographicalDomain_394AC9E11C2E8C8994F96B6F616CD361" xlink:to="loc_algn_OtherInternationalMember_8E8C2ABFEC9A43AE21F36B6F616DC8C2" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_SegmentReportingInformationLineItems" xlink:label="loc_us-gaap_SegmentReportingInformationLineItems_85F5382A1B29566D11626B6F616D8EA7" xlink:type="locator" />
    <presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_7DA13164ECC12390176E6B6F616B00FE" xlink:to="loc_us-gaap_SegmentReportingInformationLineItems_85F5382A1B29566D11626B6F616D8EA7" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_SalesRevenueNet" xlink:label="loc_us-gaap_SalesRevenueNet_A9D168DA7897196BC4D16B6F616DB8D4" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_85F5382A1B29566D11626B6F616D8EA7" xlink:to="loc_us-gaap_SalesRevenueNet_A9D168DA7897196BC4D16B6F616DB8D4" xlink:type="arc" />
  </presentationLink>
  <presentationLink xlink:role="http://www.aligntech.com/role/SegmentInformationDetails" xlink:type="extended">
    <loc xlink:href="algn-20150331.xsd#algn_DisclosureSegmentInformationAbstract" xlink:label="loc_algn_DisclosureSegmentInformationAbstract_119F1C143275FD6D6C2DFBABA33FBB55" xlink:type="locator" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable" xlink:label="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_EB53BFE0B2DCA7B733F0FBABA33F9509" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_algn_DisclosureSegmentInformationAbstract_119F1C143275FD6D6C2DFBABA33FBB55" xlink:to="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_EB53BFE0B2DCA7B733F0FBABA33F9509" xlink:type="arc" />
    <loc xlink:href="http://xbrl.sec.gov/dei/2014/dei-2014-01-31.xsd#dei_LegalEntityAxis" xlink:label="loc_dei_LegalEntityAxis_5AACC5E75E53FE7D1F18FBABA34015E5" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_EB53BFE0B2DCA7B733F0FBABA33F9509" xlink:to="loc_dei_LegalEntityAxis_5AACC5E75E53FE7D1F18FBABA34015E5" xlink:type="arc" />
    <loc xlink:href="http://xbrl.sec.gov/dei/2014/dei-2014-01-31.xsd#dei_EntityDomain" xlink:label="loc_dei_EntityDomain_240CFD54E09E1150EF3BFBABA340AAC9" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_LegalEntityAxis_5AACC5E75E53FE7D1F18FBABA34015E5" xlink:to="loc_dei_EntityDomain_240CFD54E09E1150EF3BFBABA340AAC9" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_StatementBusinessSegmentsAxis" xlink:label="loc_us-gaap_StatementBusinessSegmentsAxis_35AEDDEEF1D3F7754706FBABA340C47A" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_EB53BFE0B2DCA7B733F0FBABA33F9509" xlink:to="loc_us-gaap_StatementBusinessSegmentsAxis_35AEDDEEF1D3F7754706FBABA340C47A" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_SegmentDomain" xlink:label="loc_us-gaap_SegmentDomain_DCF65B5228722E8EF63DFBABA3408503" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_35AEDDEEF1D3F7754706FBABA340C47A" xlink:to="loc_us-gaap_SegmentDomain_DCF65B5228722E8EF63DFBABA3408503" xlink:type="arc" />
    <loc xlink:href="algn-20150331.xsd#algn_ClearAlignerMember" xlink:label="loc_algn_ClearAlignerMember_CA4964D07D0D3194BEE2FBABA3403653" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_SegmentDomain_DCF65B5228722E8EF63DFBABA3408503" xlink:to="loc_algn_ClearAlignerMember_CA4964D07D0D3194BEE2FBABA3403653" xlink:type="arc" />
    <loc xlink:href="algn-20150331.xsd#algn_InvisalignFullMember" xlink:label="loc_algn_InvisalignFullMember_47AF918B4F03D16E19F2FBABA340A1FA" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_algn_ClearAlignerMember_CA4964D07D0D3194BEE2FBABA3403653" xlink:to="loc_algn_InvisalignFullMember_47AF918B4F03D16E19F2FBABA340A1FA" xlink:type="arc" />
    <loc xlink:href="algn-20150331.xsd#algn_ScannersAndCadcamMember" xlink:label="loc_algn_ScannersAndCadcamMember_536FBFF175FDF1F2DE82FBABA340517A" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_SegmentDomain_DCF65B5228722E8EF63DFBABA3408503" xlink:to="loc_algn_ScannersAndCadcamMember_536FBFF175FDF1F2DE82FBABA340517A" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_SegmentReportingInformationLineItems" xlink:label="loc_us-gaap_SegmentReportingInformationLineItems_A213DA3CCC2F8A1B45A1FBABA3405F7E" xlink:type="locator" />
    <presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_EB53BFE0B2DCA7B733F0FBABA33F9509" xlink:to="loc_us-gaap_SegmentReportingInformationLineItems_A213DA3CCC2F8A1B45A1FBABA3405F7E" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_SalesRevenueNet" xlink:label="loc_us-gaap_SalesRevenueNet_44F6F7EDB6581BCD955CFBABA3407FA9" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_A213DA3CCC2F8A1B45A1FBABA3405F7E" xlink:to="loc_us-gaap_SalesRevenueNet_44F6F7EDB6581BCD955CFBABA3407FA9" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_GrossProfit" xlink:label="loc_us-gaap_GrossProfit_970475F20462659342A5FBABA34197EE" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_A213DA3CCC2F8A1B45A1FBABA3405F7E" xlink:to="loc_us-gaap_GrossProfit_970475F20462659342A5FBABA34197EE" xlink:type="arc" />
  </presentationLink>
  <presentationLink xlink:role="http://www.aligntech.com/role/SegmentsAndGeographicalInformation" xlink:type="extended">
    <loc xlink:href="algn-20150331.xsd#algn_NotesToFinancialStatementsAbstract" xlink:label="loc_algn_NotesToFinancialStatementsAbstract_A42A7196118FEE71B47E6B6F61FD7664" xlink:type="locator" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_SegmentReportingDisclosureTextBlock" xlink:label="loc_us-gaap_SegmentReportingDisclosureTextBlock_ACB1BD04E0C702FB82CF6B6F61FDBBBC" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_algn_NotesToFinancialStatementsAbstract_A42A7196118FEE71B47E6B6F61FD7664" xlink:to="loc_us-gaap_SegmentReportingDisclosureTextBlock_ACB1BD04E0C702FB82CF6B6F61FDBBBC" xlink:type="arc" />
  </presentationLink>
  <presentationLink xlink:role="http://www.aligntech.com/role/SegmentsAndGeographicalInformationAdditionalInformationDetails" xlink:type="extended">
    <loc xlink:href="algn-20150331.xsd#algn_DisclosureSegmentsAndGeographicalInformationAdditionalInformationAbstract" xlink:label="loc_algn_DisclosureSegmentsAndGeographicalInformationAdditionalInformationAbstract_2F7C2C8CB7C92DFFAB186B6F61A73853" xlink:type="locator" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_NumberOfReportableSegments" xlink:label="loc_us-gaap_NumberOfReportableSegments_E0C6AA5ED93DA90128656B6F61A78576" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_algn_DisclosureSegmentsAndGeographicalInformationAdditionalInformationAbstract_2F7C2C8CB7C92DFFAB186B6F61A73853" xlink:to="loc_us-gaap_NumberOfReportableSegments_E0C6AA5ED93DA90128656B6F61A78576" xlink:type="arc" />
  </presentationLink>
  <presentationLink xlink:role="http://www.aligntech.com/role/SegmentsAndGeographicalInformationTables" xlink:type="extended">
    <loc xlink:href="algn-20150331.xsd#algn_NotesToFinancialStatementsAbstract" xlink:label="loc_algn_NotesToFinancialStatementsAbstract_691A75C87C1C0613F8BB6B6F60E64E25" xlink:type="locator" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_ScheduleOfRevenuesFromExternalCustomersAndLongLivedAssetsByGeographicalAreasTableTextBlock" xlink:label="loc_us-gaap_ScheduleOfRevenuesFromExternalCustomersAndLongLivedAssetsByGeographicalAreasTableTextBlock_05D5A02F0DD4DDCF3CA46B6F60E64F3A" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_algn_NotesToFinancialStatementsAbstract_691A75C87C1C0613F8BB6B6F60E64E25" xlink:to="loc_us-gaap_ScheduleOfRevenuesFromExternalCustomersAndLongLivedAssetsByGeographicalAreasTableTextBlock_05D5A02F0DD4DDCF3CA46B6F60E64F3A" xlink:type="arc" />
  </presentationLink>
  <presentationLink xlink:role="http://www.aligntech.com/role/ShortTermAndLongTermMarketableSecuritiesDetails" xlink:type="extended">
    <loc xlink:href="algn-20150331.xsd#algn_DisclosureShortTermAndLongTermMarketableSecuritiesAbstract" xlink:label="loc_algn_DisclosureShortTermAndLongTermMarketableSecuritiesAbstract_85098A80795B22609272063AD54028F5" xlink:type="locator" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_ScheduleOfAvailableForSaleSecuritiesTable" xlink:label="loc_us-gaap_ScheduleOfAvailableForSaleSecuritiesTable_DADC64A0BCD2F7D2E5C1063AD5407F2C" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_algn_DisclosureShortTermAndLongTermMarketableSecuritiesAbstract_85098A80795B22609272063AD54028F5" xlink:to="loc_us-gaap_ScheduleOfAvailableForSaleSecuritiesTable_DADC64A0BCD2F7D2E5C1063AD5407F2C" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_FairValueByMeasurementFrequencyAxis" xlink:label="loc_us-gaap_FairValueByMeasurementFrequencyAxis_BDE1AA80EA5553BFFED2063AD540C575" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ScheduleOfAvailableForSaleSecuritiesTable_DADC64A0BCD2F7D2E5C1063AD5407F2C" xlink:to="loc_us-gaap_FairValueByMeasurementFrequencyAxis_BDE1AA80EA5553BFFED2063AD540C575" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_FairValueMeasurementFrequencyDomain" xlink:label="loc_us-gaap_FairValueMeasurementFrequencyDomain_36C938CDBCC935834E15063AD5406462" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_FairValueByMeasurementFrequencyAxis_BDE1AA80EA5553BFFED2063AD540C575" xlink:to="loc_us-gaap_FairValueMeasurementFrequencyDomain_36C938CDBCC935834E15063AD5406462" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_FairValueMeasurementsRecurringMember" xlink:label="loc_us-gaap_FairValueMeasurementsRecurringMember_90020ED52A31608980BF063AD5401F1A" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_FairValueMeasurementFrequencyDomain_36C938CDBCC935834E15063AD5406462" xlink:to="loc_us-gaap_FairValueMeasurementsRecurringMember_90020ED52A31608980BF063AD5401F1A" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_ScheduleOfFairValueOfSeparateAccountsByMajorCategoryOfInvestmentAxis" xlink:label="loc_us-gaap_ScheduleOfFairValueOfSeparateAccountsByMajorCategoryOfInvestmentAxis_631F538333CD32E58647063AD54085C9" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ScheduleOfAvailableForSaleSecuritiesTable_DADC64A0BCD2F7D2E5C1063AD5407F2C" xlink:to="loc_us-gaap_ScheduleOfFairValueOfSeparateAccountsByMajorCategoryOfInvestmentAxis_631F538333CD32E58647063AD54085C9" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_ScheduleOfFairValueOfSeparateAccountsByMajorCategoryOfInvestmentCategoryDomain" xlink:label="loc_us-gaap_ScheduleOfFairValueOfSeparateAccountsByMajorCategoryOfInvestmentCategoryDomain_2E998354256A0F8DCC73063AD54032BA" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ScheduleOfFairValueOfSeparateAccountsByMajorCategoryOfInvestmentAxis_631F538333CD32E58647063AD54085C9" xlink:to="loc_us-gaap_ScheduleOfFairValueOfSeparateAccountsByMajorCategoryOfInvestmentCategoryDomain_2E998354256A0F8DCC73063AD54032BA" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_ShortTermInvestmentsMember" xlink:label="loc_us-gaap_ShortTermInvestmentsMember_395282277999254495E4063AD540F021" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ScheduleOfFairValueOfSeparateAccountsByMajorCategoryOfInvestmentCategoryDomain_2E998354256A0F8DCC73063AD54032BA" xlink:to="loc_us-gaap_ShortTermInvestmentsMember_395282277999254495E4063AD540F021" xlink:type="arc" />
    <loc xlink:href="algn-20150331.xsd#algn_LongTermInvestmentsMember" xlink:label="loc_algn_LongTermInvestmentsMember_DCE5325ABF5569573B5C063AD5406554" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ScheduleOfFairValueOfSeparateAccountsByMajorCategoryOfInvestmentCategoryDomain_2E998354256A0F8DCC73063AD54032BA" xlink:to="loc_algn_LongTermInvestmentsMember_DCE5325ABF5569573B5C063AD5406554" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis" xlink:label="loc_us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis_5EF093F93155B3416C98063AD5407B4A" xlink:type="locator" />
    <presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ScheduleOfAvailableForSaleSecuritiesTable_DADC64A0BCD2F7D2E5C1063AD5407F2C" xlink:to="loc_us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis_5EF093F93155B3416C98063AD5407B4A" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_MajorTypesOfDebtAndEquitySecuritiesDomain" xlink:label="loc_us-gaap_MajorTypesOfDebtAndEquitySecuritiesDomain_9E1C0E2DC87C1462CE07063AD54049FB" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis_5EF093F93155B3416C98063AD5407B4A" xlink:to="loc_us-gaap_MajorTypesOfDebtAndEquitySecuritiesDomain_9E1C0E2DC87C1462CE07063AD54049FB" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_CommercialPaperMember" xlink:label="loc_us-gaap_CommercialPaperMember_47A3068322206DBD599C063AD5406CEA" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_MajorTypesOfDebtAndEquitySecuritiesDomain_9E1C0E2DC87C1462CE07063AD54049FB" xlink:to="loc_us-gaap_CommercialPaperMember_47A3068322206DBD599C063AD5406CEA" xlink:type="arc" />
    <loc xlink:href="algn-20150331.xsd#algn_CorporateBondsMember" xlink:label="loc_algn_CorporateBondsMember_863CBB1450264D819459063AD540A0E7" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_MajorTypesOfDebtAndEquitySecuritiesDomain_9E1C0E2DC87C1462CE07063AD54049FB" xlink:to="loc_algn_CorporateBondsMember_863CBB1450264D819459063AD540A0E7" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_ForeignGovernmentDebtSecuritiesMember" xlink:label="loc_us-gaap_ForeignGovernmentDebtSecuritiesMember_63888DE5897A0A9C259A063AD54077D4" xlink:type="locator" />
    <presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_MajorTypesOfDebtAndEquitySecuritiesDomain_9E1C0E2DC87C1462CE07063AD54049FB" xlink:to="loc_us-gaap_ForeignGovernmentDebtSecuritiesMember_63888DE5897A0A9C259A063AD54077D4" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_AgencySecuritiesMember" xlink:label="loc_us-gaap_AgencySecuritiesMember_3A4289156398D2EC3302063AD540717E" xlink:type="locator" />
    <presentationArc order="4" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_MajorTypesOfDebtAndEquitySecuritiesDomain_9E1C0E2DC87C1462CE07063AD54049FB" xlink:to="loc_us-gaap_AgencySecuritiesMember_3A4289156398D2EC3302063AD540717E" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_USTreasuryBondSecuritiesMember" xlink:label="loc_us-gaap_USTreasuryBondSecuritiesMember_5DBAFA4F5F70BF1C7D31063AD5409AFD" xlink:type="locator" />
    <presentationArc order="5" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_MajorTypesOfDebtAndEquitySecuritiesDomain_9E1C0E2DC87C1462CE07063AD54049FB" xlink:to="loc_us-gaap_USTreasuryBondSecuritiesMember_5DBAFA4F5F70BF1C7D31063AD5409AFD" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_AssetBackedSecuritiesMember" xlink:label="loc_us-gaap_AssetBackedSecuritiesMember_9E53E5925D4715AA1D4D063AD540FD61" xlink:type="locator" />
    <presentationArc order="6" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_MajorTypesOfDebtAndEquitySecuritiesDomain_9E1C0E2DC87C1462CE07063AD54049FB" xlink:to="loc_us-gaap_AssetBackedSecuritiesMember_9E53E5925D4715AA1D4D063AD540FD61" xlink:type="arc" />
    <loc xlink:href="algn-20150331.xsd#algn_MunicipalSecuritiesMember" xlink:label="loc_algn_MunicipalSecuritiesMember_D1933DB9595C73370401063AD5404A64" xlink:type="locator" />
    <presentationArc order="7" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_MajorTypesOfDebtAndEquitySecuritiesDomain_9E1C0E2DC87C1462CE07063AD54049FB" xlink:to="loc_algn_MunicipalSecuritiesMember_D1933DB9595C73370401063AD5404A64" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_ForeignCorporateDebtSecuritiesMember" xlink:label="loc_us-gaap_ForeignCorporateDebtSecuritiesMember_65F3BC703D867BDB36BB063AD5408A70" xlink:type="locator" />
    <presentationArc order="8" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_MajorTypesOfDebtAndEquitySecuritiesDomain_9E1C0E2DC87C1462CE07063AD54049FB" xlink:to="loc_us-gaap_ForeignCorporateDebtSecuritiesMember_65F3BC703D867BDB36BB063AD5408A70" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_USTreasuryAndGovernmentMember" xlink:label="loc_us-gaap_USTreasuryAndGovernmentMember_D3A26BBF78636A584550063AD540CB81" xlink:type="locator" />
    <presentationArc order="9" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_MajorTypesOfDebtAndEquitySecuritiesDomain_9E1C0E2DC87C1462CE07063AD54049FB" xlink:to="loc_us-gaap_USTreasuryAndGovernmentMember_D3A26BBF78636A584550063AD540CB81" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_CertificatesOfDepositMember" xlink:label="loc_us-gaap_CertificatesOfDepositMember_4F4088FDCAF55179E405063AD540589D" xlink:type="locator" />
    <presentationArc order="10" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_MajorTypesOfDebtAndEquitySecuritiesDomain_9E1C0E2DC87C1462CE07063AD54049FB" xlink:to="loc_us-gaap_CertificatesOfDepositMember_4F4088FDCAF55179E405063AD540589D" xlink:type="arc" />
    <loc xlink:href="algn-20150331.xsd#algn_AgencydiscountnotesMember" xlink:label="loc_algn_AgencydiscountnotesMember_F845C7C964BA13CE93C0063AD5407261" xlink:type="locator" />
    <presentationArc order="11" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_MajorTypesOfDebtAndEquitySecuritiesDomain_9E1C0E2DC87C1462CE07063AD54049FB" xlink:to="loc_algn_AgencydiscountnotesMember_F845C7C964BA13CE93C0063AD5407261" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems" xlink:label="loc_us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems_F36790B388BFF499FAF1063AD5405042" xlink:type="locator" />
    <presentationArc order="4" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ScheduleOfAvailableForSaleSecuritiesTable_DADC64A0BCD2F7D2E5C1063AD5407F2C" xlink:to="loc_us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems_F36790B388BFF499FAF1063AD5405042" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_AvailableForSaleSecuritiesAmortizedCost" xlink:label="loc_us-gaap_AvailableForSaleSecuritiesAmortizedCost_BA5A2CC1C72483392794063AD540A0EC" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems_F36790B388BFF499FAF1063AD5405042" xlink:to="loc_us-gaap_AvailableForSaleSecuritiesAmortizedCost_BA5A2CC1C72483392794063AD540A0EC" xlink:type="arc" />
    <loc xlink:href="algn-20150331.xsd#algn_AvailableForSaleSecuritiesGrossUnrealizedGainInInvestments" xlink:label="loc_algn_AvailableForSaleSecuritiesGrossUnrealizedGainInInvestments_5E949A678EC130E59500063AD5400604" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems_F36790B388BFF499FAF1063AD5405042" xlink:to="loc_algn_AvailableForSaleSecuritiesGrossUnrealizedGainInInvestments_5E949A678EC130E59500063AD5400604" xlink:type="arc" />
    <loc xlink:href="algn-20150331.xsd#algn_AvailableForSaleSecuritiesGrossUnrealizedLossInInvestments" xlink:label="loc_algn_AvailableForSaleSecuritiesGrossUnrealizedLossInInvestments_C0215D8C3E3E2ED1D6E4063AD540DF79" xlink:type="locator" />
    <presentationArc order="3" preferredLabel="http://www.xbrl.org/2009/role/negatedLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems_F36790B388BFF499FAF1063AD5405042" xlink:to="loc_algn_AvailableForSaleSecuritiesGrossUnrealizedLossInInvestments_C0215D8C3E3E2ED1D6E4063AD540DF79" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_AvailableForSaleSecurities" xlink:label="loc_us-gaap_AvailableForSaleSecurities_5EA1D18B8D6772F87199063AD54042C3" xlink:type="locator" />
    <presentationArc order="4" preferredLabel="http://www.xbrl.org/2003/role/totalLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems_F36790B388BFF499FAF1063AD5405042" xlink:to="loc_us-gaap_AvailableForSaleSecurities_5EA1D18B8D6772F87199063AD54042C3" xlink:type="arc" />
  </presentationLink>
  <presentationLink xlink:role="http://www.aligntech.com/role/StockBasedCompensation" xlink:type="extended">
    <loc xlink:href="algn-20150331.xsd#algn_NotesToFinancialStatementsAbstract" xlink:label="loc_algn_NotesToFinancialStatementsAbstract_9CC0C9ED0A4F9D93176B6B6F61B5010F" xlink:type="locator" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_DisclosureOfCompensationRelatedCostsShareBasedPaymentsTextBlock" xlink:label="loc_us-gaap_DisclosureOfCompensationRelatedCostsShareBasedPaymentsTextBlock_A61612187AA0D1CC3C996B6F61B57669" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_algn_NotesToFinancialStatementsAbstract_9CC0C9ED0A4F9D93176B6B6F61B5010F" xlink:to="loc_us-gaap_DisclosureOfCompensationRelatedCostsShareBasedPaymentsTextBlock_A61612187AA0D1CC3C996B6F61B57669" xlink:type="arc" />
  </presentationLink>
  <presentationLink xlink:role="http://www.aligntech.com/role/StockBasedCompensationAdditionalInformationDetails" xlink:type="extended">
    <loc xlink:href="algn-20150331.xsd#algn_DisclosureStockbasedCompensationAdditionalInformationAbstract" xlink:label="loc_algn_DisclosureStockbasedCompensationAdditionalInformationAbstract_D44D249B54FEC2F0F8A0FBABA3838C6A" xlink:type="locator" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable" xlink:label="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_3ECEBBEC4E1CF27A6B8AFBABA3834709" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_algn_DisclosureStockbasedCompensationAdditionalInformationAbstract_D44D249B54FEC2F0F8A0FBABA3838C6A" xlink:to="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_3ECEBBEC4E1CF27A6B8AFBABA3834709" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_AwardTypeAxis" xlink:label="loc_us-gaap_AwardTypeAxis_4B0296528B91FF6DCFD5FBABA383FABB" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_3ECEBBEC4E1CF27A6B8AFBABA3834709" xlink:to="loc_us-gaap_AwardTypeAxis_4B0296528B91FF6DCFD5FBABA383FABB" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_DDEE8BF3F4438CEC4D99FBABA383EEBA" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_AwardTypeAxis_4B0296528B91FF6DCFD5FBABA383FABB" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_DDEE8BF3F4438CEC4D99FBABA383EEBA" xlink:type="arc" />
    <loc xlink:href="algn-20150331.xsd#algn_EmployeeStockPurchasePlan2010Member" xlink:label="loc_algn_EmployeeStockPurchasePlan2010Member_B831E6E896897A5D1940FBABA3830E25" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_DDEE8BF3F4438CEC4D99FBABA383EEBA" xlink:to="loc_algn_EmployeeStockPurchasePlan2010Member_B831E6E896897A5D1940FBABA3830E25" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_RestrictedStockUnitsRSUMember" xlink:label="loc_us-gaap_RestrictedStockUnitsRSUMember_7C9760AD25A8CFF16D4DFBABA3837DFF" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_DDEE8BF3F4438CEC4D99FBABA383EEBA" xlink:to="loc_us-gaap_RestrictedStockUnitsRSUMember_7C9760AD25A8CFF16D4DFBABA3837DFF" xlink:type="arc" />
    <loc xlink:href="algn-20150331.xsd#algn_MarketPerformanceBasedRestrictedStockUnitsMember" xlink:label="loc_algn_MarketPerformanceBasedRestrictedStockUnitsMember_4EC5AC2DEF9B07F77B89FBABA3841942" xlink:type="locator" />
    <presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_DDEE8BF3F4438CEC4D99FBABA383EEBA" xlink:to="loc_algn_MarketPerformanceBasedRestrictedStockUnitsMember_4EC5AC2DEF9B07F77B89FBABA3841942" xlink:type="arc" />
    <loc xlink:href="algn-20150331.xsd#algn_EmployeeStockPurchasePlanMember" xlink:label="loc_algn_EmployeeStockPurchasePlanMember_2A9D5369B1F67B6F773AFBABA3843908" xlink:type="locator" />
    <presentationArc order="4" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_DDEE8BF3F4438CEC4D99FBABA383EEBA" xlink:to="loc_algn_EmployeeStockPurchasePlanMember_2A9D5369B1F67B6F773AFBABA3843908" xlink:type="arc" />
    <loc xlink:href="algn-20150331.xsd#algn_ScheduleOfShareBasedCompensationArrangementByShareBasedPaymentAwardAxis" xlink:label="loc_algn_ScheduleOfShareBasedCompensationArrangementByShareBasedPaymentAwardAxis_AF4C03F7AC304017D901FBABA384AA74" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_3ECEBBEC4E1CF27A6B8AFBABA3834709" xlink:to="loc_algn_ScheduleOfShareBasedCompensationArrangementByShareBasedPaymentAwardAxis_AF4C03F7AC304017D901FBABA384AA74" xlink:type="arc" />
    <loc xlink:href="algn-20150331.xsd#algn_ShareBasedCompensationArrangementsByShareBasedPaymentAwardDomain" xlink:label="loc_algn_ShareBasedCompensationArrangementsByShareBasedPaymentAwardDomain_41B760C3969B44E064C5FBABA384453F" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_algn_ScheduleOfShareBasedCompensationArrangementByShareBasedPaymentAwardAxis_AF4C03F7AC304017D901FBABA384AA74" xlink:to="loc_algn_ShareBasedCompensationArrangementsByShareBasedPaymentAwardDomain_41B760C3969B44E064C5FBABA384453F" xlink:type="arc" />
    <loc xlink:href="algn-20150331.xsd#algn_StockIncentivePlan2005Member" xlink:label="loc_algn_StockIncentivePlan2005Member_549D414151723765E992FBABA38414AC" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_algn_ShareBasedCompensationArrangementsByShareBasedPaymentAwardDomain_41B760C3969B44E064C5FBABA384453F" xlink:to="loc_algn_StockIncentivePlan2005Member_549D414151723765E992FBABA38414AC" xlink:type="arc" />
    <loc xlink:href="algn-20150331.xsd#algn_AmendedAndRestated2005StockIncentivePlanMember" xlink:label="loc_algn_AmendedAndRestated2005StockIncentivePlanMember_42429355F19F4C1E7D9CFBABA3849D9C" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_algn_ShareBasedCompensationArrangementsByShareBasedPaymentAwardDomain_41B760C3969B44E064C5FBABA384453F" xlink:to="loc_algn_AmendedAndRestated2005StockIncentivePlanMember_42429355F19F4C1E7D9CFBABA3849D9C" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_RangeAxis" xlink:label="loc_us-gaap_RangeAxis_BF86BC0B0FDF10177B6AFBABA3844BEE" xlink:type="locator" />
    <presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_3ECEBBEC4E1CF27A6B8AFBABA3834709" xlink:to="loc_us-gaap_RangeAxis_BF86BC0B0FDF10177B6AFBABA3844BEE" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_RangeMember" xlink:label="loc_us-gaap_RangeMember_0976277CF1E1F2B86318FBABA3848079" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_RangeAxis_BF86BC0B0FDF10177B6AFBABA3844BEE" xlink:to="loc_us-gaap_RangeMember_0976277CF1E1F2B86318FBABA3848079" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_MinimumMember" xlink:label="loc_us-gaap_MinimumMember_DD5B26365A7018CB7025FBABA384E471" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_RangeMember_0976277CF1E1F2B86318FBABA3848079" xlink:to="loc_us-gaap_MinimumMember_DD5B26365A7018CB7025FBABA384E471" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_MaximumMember" xlink:label="loc_us-gaap_MaximumMember_A4D0D56ABEC391051BDBFBABA384545B" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_RangeMember_0976277CF1E1F2B86318FBABA3848079" xlink:to="loc_us-gaap_MaximumMember_A4D0D56ABEC391051BDBFBABA384545B" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_DBF610CE4C6A8CF299B6FBABA3848D81" xlink:type="locator" />
    <presentationArc order="4" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_3ECEBBEC4E1CF27A6B8AFBABA3834709" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_DBF610CE4C6A8CF299B6FBABA3848D81" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_CommonStockCapitalSharesReservedForFutureIssuance" xlink:label="loc_us-gaap_CommonStockCapitalSharesReservedForFutureIssuance_98D156E02A628568A210FBABA384E9EA" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_DBF610CE4C6A8CF299B6FBABA3848D81" xlink:to="loc_us-gaap_CommonStockCapitalSharesReservedForFutureIssuance_98D156E02A628568A210FBABA384E9EA" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized" xlink:label="loc_us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized_2F9D50D6298D965EF01AFBABA384890B" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_DBF610CE4C6A8CF299B6FBABA3848D81" xlink:to="loc_us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized_2F9D50D6298D965EF01AFBABA384890B" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedPeriodForRecognition1" xlink:label="loc_us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedPeriodForRecognition1_B181F99074CF15AA7F2BFBABA3847265" xlink:type="locator" />
    <presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_DBF610CE4C6A8CF299B6FBABA3848D81" xlink:to="loc_us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedPeriodForRecognition1_B181F99074CF15AA7F2BFBABA3847265" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPeriod1" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPeriod1_72447A2BC660CC7D61C4FBABA384E437" xlink:type="locator" />
    <presentationArc order="4" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_DBF610CE4C6A8CF299B6FBABA3848D81" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPeriod1_72447A2BC660CC7D61C4FBABA384E437" xlink:type="arc" />
    <loc xlink:href="algn-20150331.xsd#algn_PercentageOfMarketPerformanceBasedRestrictedStockUnitsDuringVestingPeriod" xlink:label="loc_algn_PercentageOfMarketPerformanceBasedRestrictedStockUnitsDuringVestingPeriod_3B0CA9E8671516F3879FFBABA384E8A0" xlink:type="locator" />
    <presentationArc order="5" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_DBF610CE4C6A8CF299B6FBABA3848D81" xlink:to="loc_algn_PercentageOfMarketPerformanceBasedRestrictedStockUnitsDuringVestingPeriod_3B0CA9E8671516F3879FFBABA384E8A0" xlink:type="arc" />
    <loc xlink:href="algn-20150331.xsd#algn_EmployeeStockPurchasePlanNumberOfSharesAvailableForIssuance" xlink:label="loc_algn_EmployeeStockPurchasePlanNumberOfSharesAvailableForIssuance_9DF6FABE0CC9807AFD6DFBABA385F533" xlink:type="locator" />
    <presentationArc order="6" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_DBF610CE4C6A8CF299B6FBABA3848D81" xlink:to="loc_algn_EmployeeStockPurchasePlanNumberOfSharesAvailableForIssuance_9DF6FABE0CC9807AFD6DFBABA385F533" xlink:type="arc" />
    <loc xlink:href="algn-20150331.xsd#algn_ShareBasedCompensationArrangementByShareBasedPaymentAwardSharesRemainingAvailableForIssuance" xlink:label="loc_algn_ShareBasedCompensationArrangementByShareBasedPaymentAwardSharesRemainingAvailableForIssuance_6ED7439519C6DF4E9BB3FBABA3859494" xlink:type="locator" />
    <presentationArc order="7" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_DBF610CE4C6A8CF299B6FBABA3848D81" xlink:to="loc_algn_ShareBasedCompensationArrangementByShareBasedPaymentAwardSharesRemainingAvailableForIssuance_6ED7439519C6DF4E9BB3FBABA3859494" xlink:type="arc" />
  </presentationLink>
  <presentationLink xlink:role="http://www.aligntech.com/role/StockBasedCompensationExpenseRelatedToAllStockBasedAwardsAndEmployeeStockPurchasesDetails" xlink:type="extended">
    <loc xlink:href="algn-20150331.xsd#algn_DisclosureStockBasedCompensationExpenseRelatedToAllStockBasedAwardsAndEmployeeStockPurchasesAbstract" xlink:label="loc_algn_DisclosureStockBasedCompensationExpenseRelatedToAllStockBasedAwardsAndEmployeeStockPurchasesAbstract_3EEA6951DADE22AFBCBAFBABA37EB529" xlink:type="locator" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_ScheduleOfEmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsTable" xlink:label="loc_us-gaap_ScheduleOfEmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsTable_49462A85FF6EB71D4418FBABA37EA6A4" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_algn_DisclosureStockBasedCompensationExpenseRelatedToAllStockBasedAwardsAndEmployeeStockPurchasesAbstract_3EEA6951DADE22AFBCBAFBABA37EB529" xlink:to="loc_us-gaap_ScheduleOfEmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsTable_49462A85FF6EB71D4418FBABA37EA6A4" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_IncomeStatementLocationAxis" xlink:label="loc_us-gaap_IncomeStatementLocationAxis_E6E0BF5CEBC1F99A175BFBABA37E54AC" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ScheduleOfEmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsTable_49462A85FF6EB71D4418FBABA37EA6A4" xlink:to="loc_us-gaap_IncomeStatementLocationAxis_E6E0BF5CEBC1F99A175BFBABA37E54AC" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_IncomeStatementLocationDomain" xlink:label="loc_us-gaap_IncomeStatementLocationDomain_5696130DC46F68804522FBABA37E3A19" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_IncomeStatementLocationAxis_E6E0BF5CEBC1F99A175BFBABA37E54AC" xlink:to="loc_us-gaap_IncomeStatementLocationDomain_5696130DC46F68804522FBABA37E3A19" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_CostOfSalesMember" xlink:label="loc_us-gaap_CostOfSalesMember_10A1BF0F291DDB37664AFBABA37FFFB7" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_IncomeStatementLocationDomain_5696130DC46F68804522FBABA37E3A19" xlink:to="loc_us-gaap_CostOfSalesMember_10A1BF0F291DDB37664AFBABA37FFFB7" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_SellingAndMarketingExpenseMember" xlink:label="loc_us-gaap_SellingAndMarketingExpenseMember_0069F3B8D44A53F17028FBABA37FCCE1" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_IncomeStatementLocationDomain_5696130DC46F68804522FBABA37E3A19" xlink:to="loc_us-gaap_SellingAndMarketingExpenseMember_0069F3B8D44A53F17028FBABA37FCCE1" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_ResearchAndDevelopmentExpenseMember" xlink:label="loc_us-gaap_ResearchAndDevelopmentExpenseMember_84819E0455A412B83F01FBABA37F32D8" xlink:type="locator" />
    <presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_IncomeStatementLocationDomain_5696130DC46F68804522FBABA37E3A19" xlink:to="loc_us-gaap_ResearchAndDevelopmentExpenseMember_84819E0455A412B83F01FBABA37F32D8" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_EmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsLineItems" xlink:label="loc_us-gaap_EmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsLineItems_2A87D79ACA933E26B3D7FBABA37F0271" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ScheduleOfEmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsTable_49462A85FF6EB71D4418FBABA37EA6A4" xlink:to="loc_us-gaap_EmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsLineItems_2A87D79ACA933E26B3D7FBABA37F0271" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_AllocatedShareBasedCompensationExpense" xlink:label="loc_us-gaap_AllocatedShareBasedCompensationExpense_76286952C91E66FF8551FBABA37FE5E2" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_EmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsLineItems_2A87D79ACA933E26B3D7FBABA37F0271" xlink:to="loc_us-gaap_AllocatedShareBasedCompensationExpense_76286952C91E66FF8551FBABA37FE5E2" xlink:type="arc" />
  </presentationLink>
  <presentationLink xlink:role="http://www.aligntech.com/role/StockBasedCompensationStockBasedCompensationEmployeeStockPurchasePlanDetails" xlink:type="extended">
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_DisclosureOfCompensationRelatedCostsSharebasedPaymentsAbstract" xlink:label="loc_us-gaap_DisclosureOfCompensationRelatedCostsSharebasedPaymentsAbstract_C74C99F04A9315AEB8376B6F61A4CF85" xlink:type="locator" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardFairValueAssumptionsExpectedTerm1" xlink:label="loc_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardFairValueAssumptionsExpectedTerm1_90B472BBC648CB47B0356B6F61A497EF" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DisclosureOfCompensationRelatedCostsSharebasedPaymentsAbstract_C74C99F04A9315AEB8376B6F61A4CF85" xlink:to="loc_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardFairValueAssumptionsExpectedTerm1_90B472BBC648CB47B0356B6F61A497EF" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate_2926A577C99BFDC8EC4E6B6F61A454C4" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DisclosureOfCompensationRelatedCostsSharebasedPaymentsAbstract_C74C99F04A9315AEB8376B6F61A4CF85" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate_2926A577C99BFDC8EC4E6B6F61A454C4" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate_B3F0D9FCD49C112368566B6F61A4C5F1" xlink:type="locator" />
    <presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DisclosureOfCompensationRelatedCostsSharebasedPaymentsAbstract_C74C99F04A9315AEB8376B6F61A4CF85" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate_B3F0D9FCD49C112368566B6F61A4C5F1" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendRate" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendRate_74AAA9A1445128D2ECC46B6F61A4005B" xlink:type="locator" />
    <presentationArc order="4" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DisclosureOfCompensationRelatedCostsSharebasedPaymentsAbstract_C74C99F04A9315AEB8376B6F61A4CF85" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendRate_74AAA9A1445128D2ECC46B6F61A4005B" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue_4EF928387271BF6D7DB86B6F61A4E0C3" xlink:type="locator" />
    <presentationArc order="5" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DisclosureOfCompensationRelatedCostsSharebasedPaymentsAbstract_C74C99F04A9315AEB8376B6F61A4CF85" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue_4EF928387271BF6D7DB86B6F61A4E0C3" xlink:type="arc" />
  </presentationLink>
  <presentationLink xlink:role="http://www.aligntech.com/role/StockBasedCompensationTables" xlink:type="extended">
    <loc xlink:href="algn-20150331.xsd#algn_NotesToFinancialStatementsAbstract" xlink:label="loc_algn_NotesToFinancialStatementsAbstract_494B708A033829DBF1166B6F61A1E547" xlink:type="locator" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_StatementTable" xlink:label="loc_us-gaap_StatementTable_4B1AB63718F4196474DE6B6F61A129F5" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_algn_NotesToFinancialStatementsAbstract_494B708A033829DBF1166B6F61A1E547" xlink:to="loc_us-gaap_StatementTable_4B1AB63718F4196474DE6B6F61A129F5" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_AwardTypeAxis" xlink:label="loc_us-gaap_AwardTypeAxis_EECED036EE16010733086B6F61A16FC7" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_StatementTable_4B1AB63718F4196474DE6B6F61A129F5" xlink:to="loc_us-gaap_AwardTypeAxis_EECED036EE16010733086B6F61A16FC7" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_C45E83A23E26BBC04C496B6F61A1A783" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_AwardTypeAxis_EECED036EE16010733086B6F61A16FC7" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_C45E83A23E26BBC04C496B6F61A1A783" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_RestrictedStockUnitsRSUMember" xlink:label="loc_us-gaap_RestrictedStockUnitsRSUMember_C08D16859BD9F83FB53B6B6F61A15025" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_C45E83A23E26BBC04C496B6F61A1A783" xlink:to="loc_us-gaap_RestrictedStockUnitsRSUMember_C08D16859BD9F83FB53B6B6F61A15025" xlink:type="arc" />
    <loc xlink:href="algn-20150331.xsd#algn_MarketPerformanceBasedRestrictedStockUnitsMember" xlink:label="loc_algn_MarketPerformanceBasedRestrictedStockUnitsMember_90C7FAE147BE68D39E016B6F61A100F9" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_C45E83A23E26BBC04C496B6F61A1A783" xlink:to="loc_algn_MarketPerformanceBasedRestrictedStockUnitsMember_90C7FAE147BE68D39E016B6F61A100F9" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_StatementLineItems" xlink:label="loc_us-gaap_StatementLineItems_54F17C975E82F869CB636B6F61A14061" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_StatementTable_4B1AB63718F4196474DE6B6F61A129F5" xlink:to="loc_us-gaap_StatementLineItems_54F17C975E82F869CB636B6F61A14061" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_ScheduleOfCompensationCostForShareBasedPaymentArrangementsAllocationOfShareBasedCompensationCostsByPlanTableTextBlock" xlink:label="loc_us-gaap_ScheduleOfCompensationCostForShareBasedPaymentArrangementsAllocationOfShareBasedCompensationCostsByPlanTableTextBlock_98D533500CB4A8ED9A8E6B6F61A1D55D" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_StatementLineItems_54F17C975E82F869CB636B6F61A14061" xlink:to="loc_us-gaap_ScheduleOfCompensationCostForShareBasedPaymentArrangementsAllocationOfShareBasedCompensationCostsByPlanTableTextBlock_98D533500CB4A8ED9A8E6B6F61A1D55D" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_ScheduleOfShareBasedCompensationStockOptionsActivityTableTextBlock" xlink:label="loc_us-gaap_ScheduleOfShareBasedCompensationStockOptionsActivityTableTextBlock_59D36DD30323AC7BFCD36B6F61A1BA53" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_StatementLineItems_54F17C975E82F869CB636B6F61A14061" xlink:to="loc_us-gaap_ScheduleOfShareBasedCompensationStockOptionsActivityTableTextBlock_59D36DD30323AC7BFCD36B6F61A1BA53" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_ScheduleOfShareBasedCompensationRestrictedStockUnitsAwardActivityTableTextBlock" xlink:label="loc_us-gaap_ScheduleOfShareBasedCompensationRestrictedStockUnitsAwardActivityTableTextBlock_A5003EC719758CF453BD6B6F61A2AD85" xlink:type="locator" />
    <presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_StatementLineItems_54F17C975E82F869CB636B6F61A14061" xlink:to="loc_us-gaap_ScheduleOfShareBasedCompensationRestrictedStockUnitsAwardActivityTableTextBlock_A5003EC719758CF453BD6B6F61A2AD85" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_ScheduleOfNonvestedPerformanceBasedUnitsActivityTableTextBlock" xlink:label="loc_us-gaap_ScheduleOfNonvestedPerformanceBasedUnitsActivityTableTextBlock_E06CBE93BA779872319B6B6F61A2E7FC" xlink:type="locator" />
    <presentationArc order="4" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_StatementLineItems_54F17C975E82F869CB636B6F61A14061" xlink:to="loc_us-gaap_ScheduleOfNonvestedPerformanceBasedUnitsActivityTableTextBlock_E06CBE93BA779872319B6B6F61A2E7FC" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_ScheduleOfShareBasedPaymentAwardEmployeeStockPurchasePlanValuationAssumptionsTableTextBlock" xlink:label="loc_us-gaap_ScheduleOfShareBasedPaymentAwardEmployeeStockPurchasePlanValuationAssumptionsTableTextBlock_CC669B44D1B33A4CB0CF6B6F61A28F08" xlink:type="locator" />
    <presentationArc order="5" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_StatementLineItems_54F17C975E82F869CB636B6F61A14061" xlink:to="loc_us-gaap_ScheduleOfShareBasedPaymentAwardEmployeeStockPurchasePlanValuationAssumptionsTableTextBlock_CC669B44D1B33A4CB0CF6B6F61A28F08" xlink:type="arc" />
  </presentationLink>
  <presentationLink xlink:role="http://www.aligntech.com/role/SummaryOfFinancialAssetsMeasuredAtFairValueOnRecurringBasisDetails" xlink:type="extended">
    <loc xlink:href="algn-20150331.xsd#algn_DisclosureSummaryOfFinancialAssetsMeasuredAtFairValueOnRecurringBasisAbstract" xlink:label="loc_algn_DisclosureSummaryOfFinancialAssetsMeasuredAtFairValueOnRecurringBasisAbstract_59DF151049D7CE7337B4063AD531B15E" xlink:type="locator" />
    <loc xlink:href="algn-20150331.xsd#algn_FairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisTable" xlink:label="loc_algn_FairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisTable_A35566258C1C7FE738BB063AD531F0DB" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_algn_DisclosureSummaryOfFinancialAssetsMeasuredAtFairValueOnRecurringBasisAbstract_59DF151049D7CE7337B4063AD531B15E" xlink:to="loc_algn_FairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisTable_A35566258C1C7FE738BB063AD531F0DB" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_FairValueByMeasurementFrequencyAxis" xlink:label="loc_us-gaap_FairValueByMeasurementFrequencyAxis_A3C41BC2C83D85808084063AD531CEC0" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_algn_FairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisTable_A35566258C1C7FE738BB063AD531F0DB" xlink:to="loc_us-gaap_FairValueByMeasurementFrequencyAxis_A3C41BC2C83D85808084063AD531CEC0" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_FairValueMeasurementFrequencyDomain" xlink:label="loc_us-gaap_FairValueMeasurementFrequencyDomain_81D4DE94B3432EFC84F5063AD5317AC0" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_FairValueByMeasurementFrequencyAxis_A3C41BC2C83D85808084063AD531CEC0" xlink:to="loc_us-gaap_FairValueMeasurementFrequencyDomain_81D4DE94B3432EFC84F5063AD5317AC0" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_FairValueMeasurementsRecurringMember" xlink:label="loc_us-gaap_FairValueMeasurementsRecurringMember_77907492B6CED62A0F45063AD53133D1" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_FairValueMeasurementFrequencyDomain_81D4DE94B3432EFC84F5063AD5317AC0" xlink:to="loc_us-gaap_FairValueMeasurementsRecurringMember_77907492B6CED62A0F45063AD53133D1" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_FairValueByFairValueHierarchyLevelAxis" xlink:label="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_68D1DE800C357E3265BD063AD53175D5" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_algn_FairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisTable_A35566258C1C7FE738BB063AD531F0DB" xlink:to="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_68D1DE800C357E3265BD063AD53175D5" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_FairValueMeasurementsFairValueHierarchyDomain" xlink:label="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_A7C3ED9E8FCCC9B02405063AD531600D" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_68D1DE800C357E3265BD063AD53175D5" xlink:to="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_A7C3ED9E8FCCC9B02405063AD531600D" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_FairValueInputsLevel1Member" xlink:label="loc_us-gaap_FairValueInputsLevel1Member_1A380BA4448212A5957B063AD5312A16" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_A7C3ED9E8FCCC9B02405063AD531600D" xlink:to="loc_us-gaap_FairValueInputsLevel1Member_1A380BA4448212A5957B063AD5312A16" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_FairValueInputsLevel2Member" xlink:label="loc_us-gaap_FairValueInputsLevel2Member_72E1DF961907182843FF063AD531243D" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_A7C3ED9E8FCCC9B02405063AD531600D" xlink:to="loc_us-gaap_FairValueInputsLevel2Member_72E1DF961907182843FF063AD531243D" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_ScheduleOfFairValueOfSeparateAccountsByMajorCategoryOfInvestmentAxis" xlink:label="loc_us-gaap_ScheduleOfFairValueOfSeparateAccountsByMajorCategoryOfInvestmentAxis_2AC5E02DFF37C573584D063AD5316299" xlink:type="locator" />
    <presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_algn_FairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisTable_A35566258C1C7FE738BB063AD531F0DB" xlink:to="loc_us-gaap_ScheduleOfFairValueOfSeparateAccountsByMajorCategoryOfInvestmentAxis_2AC5E02DFF37C573584D063AD5316299" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_ScheduleOfFairValueOfSeparateAccountsByMajorCategoryOfInvestmentCategoryDomain" xlink:label="loc_us-gaap_ScheduleOfFairValueOfSeparateAccountsByMajorCategoryOfInvestmentCategoryDomain_C12B2239545D1FA04E34063AD5316B17" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ScheduleOfFairValueOfSeparateAccountsByMajorCategoryOfInvestmentAxis_2AC5E02DFF37C573584D063AD5316299" xlink:to="loc_us-gaap_ScheduleOfFairValueOfSeparateAccountsByMajorCategoryOfInvestmentCategoryDomain_C12B2239545D1FA04E34063AD5316B17" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_CashEquivalentsMember" xlink:label="loc_us-gaap_CashEquivalentsMember_C3227958BD82992EF25E063AD531A27A" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ScheduleOfFairValueOfSeparateAccountsByMajorCategoryOfInvestmentCategoryDomain_C12B2239545D1FA04E34063AD5316B17" xlink:to="loc_us-gaap_CashEquivalentsMember_C3227958BD82992EF25E063AD531A27A" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_ShortTermInvestmentsMember" xlink:label="loc_us-gaap_ShortTermInvestmentsMember_B025BEAEDDB354314C39063AD531EBA1" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ScheduleOfFairValueOfSeparateAccountsByMajorCategoryOfInvestmentCategoryDomain_C12B2239545D1FA04E34063AD5316B17" xlink:to="loc_us-gaap_ShortTermInvestmentsMember_B025BEAEDDB354314C39063AD531EBA1" xlink:type="arc" />
    <loc xlink:href="algn-20150331.xsd#algn_LongTermInvestmentsMember" xlink:label="loc_algn_LongTermInvestmentsMember_F4C89C53FEC12349BDC3063AD5311DD1" xlink:type="locator" />
    <presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ScheduleOfFairValueOfSeparateAccountsByMajorCategoryOfInvestmentCategoryDomain_C12B2239545D1FA04E34063AD5316B17" xlink:to="loc_algn_LongTermInvestmentsMember_F4C89C53FEC12349BDC3063AD5311DD1" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_RestrictedCashAndCashEquivalentsCashAndCashEquivalentsAxis" xlink:label="loc_us-gaap_RestrictedCashAndCashEquivalentsCashAndCashEquivalentsAxis_BBD30EDB964DE2DEF2D7063AD5317080" xlink:type="locator" />
    <presentationArc order="4" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_algn_FairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisTable_A35566258C1C7FE738BB063AD531F0DB" xlink:to="loc_us-gaap_RestrictedCashAndCashEquivalentsCashAndCashEquivalentsAxis_BBD30EDB964DE2DEF2D7063AD5317080" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_RestrictedCashAndCashEquivalentsCashAndCashEquivalentsMember" xlink:label="loc_us-gaap_RestrictedCashAndCashEquivalentsCashAndCashEquivalentsMember_5070E4C841B97A33F9DE063AD5316129" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_RestrictedCashAndCashEquivalentsCashAndCashEquivalentsAxis_BBD30EDB964DE2DEF2D7063AD5317080" xlink:to="loc_us-gaap_RestrictedCashAndCashEquivalentsCashAndCashEquivalentsMember_5070E4C841B97A33F9DE063AD5316129" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_MoneyMarketFundsMember" xlink:label="loc_us-gaap_MoneyMarketFundsMember_364318BA39D9D2EF18E3063AD5316BFE" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_RestrictedCashAndCashEquivalentsCashAndCashEquivalentsMember_5070E4C841B97A33F9DE063AD5316129" xlink:to="loc_us-gaap_MoneyMarketFundsMember_364318BA39D9D2EF18E3063AD5316BFE" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_CommercialPaperMember" xlink:label="loc_us-gaap_CommercialPaperMember_2F6B874838E8E927AE93063AD5317477" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_RestrictedCashAndCashEquivalentsCashAndCashEquivalentsMember_5070E4C841B97A33F9DE063AD5316129" xlink:to="loc_us-gaap_CommercialPaperMember_2F6B874838E8E927AE93063AD5317477" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_ForeignCorporateDebtSecuritiesMember" xlink:label="loc_us-gaap_ForeignCorporateDebtSecuritiesMember_8C5D507A145917E18CBB063AD5313ECF" xlink:type="locator" />
    <presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_RestrictedCashAndCashEquivalentsCashAndCashEquivalentsMember_5070E4C841B97A33F9DE063AD5316129" xlink:to="loc_us-gaap_ForeignCorporateDebtSecuritiesMember_8C5D507A145917E18CBB063AD5313ECF" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis" xlink:label="loc_us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis_A52207DDE9C38DC8DFA5063AD531B005" xlink:type="locator" />
    <presentationArc order="5" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_algn_FairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisTable_A35566258C1C7FE738BB063AD531F0DB" xlink:to="loc_us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis_A52207DDE9C38DC8DFA5063AD531B005" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_MajorTypesOfDebtAndEquitySecuritiesDomain" xlink:label="loc_us-gaap_MajorTypesOfDebtAndEquitySecuritiesDomain_A8E2108044E6637140E3063AD5311CB9" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis_A52207DDE9C38DC8DFA5063AD531B005" xlink:to="loc_us-gaap_MajorTypesOfDebtAndEquitySecuritiesDomain_A8E2108044E6637140E3063AD5311CB9" xlink:type="arc" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_MajorTypesOfDebtAndEquitySecuritiesDomain_A8E2108044E6637140E3063AD5311CB9" xlink:to="loc_us-gaap_CommercialPaperMember_2F6B874838E8E927AE93063AD5317477" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_CorporateBondSecuritiesMember" xlink:label="loc_us-gaap_CorporateBondSecuritiesMember_2B6F2BD7D7E79547604B063AD531F278" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_MajorTypesOfDebtAndEquitySecuritiesDomain_A8E2108044E6637140E3063AD5311CB9" xlink:to="loc_us-gaap_CorporateBondSecuritiesMember_2B6F2BD7D7E79547604B063AD531F278" xlink:type="arc" />
    <presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_MajorTypesOfDebtAndEquitySecuritiesDomain_A8E2108044E6637140E3063AD5311CB9" xlink:to="loc_us-gaap_ForeignCorporateDebtSecuritiesMember_8C5D507A145917E18CBB063AD5313ECF" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_AgencySecuritiesMember" xlink:label="loc_us-gaap_AgencySecuritiesMember_816F14479A8A3AA8F8A6063AD531F0A3" xlink:type="locator" />
    <presentationArc order="4" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_MajorTypesOfDebtAndEquitySecuritiesDomain_A8E2108044E6637140E3063AD5311CB9" xlink:to="loc_us-gaap_AgencySecuritiesMember_816F14479A8A3AA8F8A6063AD531F0A3" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_ForeignGovernmentDebtSecuritiesMember" xlink:label="loc_us-gaap_ForeignGovernmentDebtSecuritiesMember_BACA5940E9D9CC443233063AD53133A3" xlink:type="locator" />
    <presentationArc order="5" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_MajorTypesOfDebtAndEquitySecuritiesDomain_A8E2108044E6637140E3063AD5311CB9" xlink:to="loc_us-gaap_ForeignGovernmentDebtSecuritiesMember_BACA5940E9D9CC443233063AD53133A3" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_USTreasuryAndGovernmentMember" xlink:label="loc_us-gaap_USTreasuryAndGovernmentMember_E3B8DBB06BCFB6B20330063AD531D4C2" xlink:type="locator" />
    <presentationArc order="6" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_MajorTypesOfDebtAndEquitySecuritiesDomain_A8E2108044E6637140E3063AD5311CB9" xlink:to="loc_us-gaap_USTreasuryAndGovernmentMember_E3B8DBB06BCFB6B20330063AD531D4C2" xlink:type="arc" />
    <loc xlink:href="algn-20150331.xsd#algn_AgencydiscountnotesMember" xlink:label="loc_algn_AgencydiscountnotesMember_845286E53B39262470D4063AD5316812" xlink:type="locator" />
    <presentationArc order="7" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_MajorTypesOfDebtAndEquitySecuritiesDomain_A8E2108044E6637140E3063AD5311CB9" xlink:to="loc_algn_AgencydiscountnotesMember_845286E53B39262470D4063AD5316812" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_CertificatesOfDepositMember" xlink:label="loc_us-gaap_CertificatesOfDepositMember_B7C603BD724FFF9719B4063AD531BBAB" xlink:type="locator" />
    <presentationArc order="8" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_MajorTypesOfDebtAndEquitySecuritiesDomain_A8E2108044E6637140E3063AD5311CB9" xlink:to="loc_us-gaap_CertificatesOfDepositMember_B7C603BD724FFF9719B4063AD531BBAB" xlink:type="arc" />
    <loc xlink:href="algn-20150331.xsd#algn_MunicipalSecuritiesMember" xlink:label="loc_algn_MunicipalSecuritiesMember_30F7829E0E4C07354B1E063AD53102FD" xlink:type="locator" />
    <presentationArc order="9" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_MajorTypesOfDebtAndEquitySecuritiesDomain_A8E2108044E6637140E3063AD5311CB9" xlink:to="loc_algn_MunicipalSecuritiesMember_30F7829E0E4C07354B1E063AD53102FD" xlink:type="arc" />
    <loc xlink:href="algn-20150331.xsd#algn_IsraeliSeveranceFundsMember" xlink:label="loc_algn_IsraeliSeveranceFundsMember_A4CBA986FE2C57E0943E063AD5318300" xlink:type="locator" />
    <presentationArc order="10" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_MajorTypesOfDebtAndEquitySecuritiesDomain_A8E2108044E6637140E3063AD5311CB9" xlink:to="loc_algn_IsraeliSeveranceFundsMember_A4CBA986FE2C57E0943E063AD5318300" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_AssetBackedSecuritiesMember" xlink:label="loc_us-gaap_AssetBackedSecuritiesMember_9BB185F453F68118A763063AD5314A05" xlink:type="locator" />
    <presentationArc order="11" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_MajorTypesOfDebtAndEquitySecuritiesDomain_A8E2108044E6637140E3063AD5311CB9" xlink:to="loc_us-gaap_AssetBackedSecuritiesMember_9BB185F453F68118A763063AD5314A05" xlink:type="arc" />
    <loc xlink:href="algn-20150331.xsd#algn_FairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisLineItems" xlink:label="loc_algn_FairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisLineItems_47B2375B4FAB4110CFD9063AD5317B24" xlink:type="locator" />
    <presentationArc order="6" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_algn_FairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisTable_A35566258C1C7FE738BB063AD531F0DB" xlink:to="loc_algn_FairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisLineItems_47B2375B4FAB4110CFD9063AD5317B24" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_CashAndCashEquivalentsFairValueDisclosure" xlink:label="loc_us-gaap_CashAndCashEquivalentsFairValueDisclosure_592E214AB51DC3C5366E063AD5318CCF" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_algn_FairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisLineItems_47B2375B4FAB4110CFD9063AD5317B24" xlink:to="loc_us-gaap_CashAndCashEquivalentsFairValueDisclosure_592E214AB51DC3C5366E063AD5318CCF" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_AvailableForSaleSecurities" xlink:label="loc_us-gaap_AvailableForSaleSecurities_9D873F7C99B05EA9DFC8063AD531C57E" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_algn_FairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisLineItems_47B2375B4FAB4110CFD9063AD5317B24" xlink:to="loc_us-gaap_AvailableForSaleSecurities_9D873F7C99B05EA9DFC8063AD531C57E" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_OtherAssetsFairValueDisclosure" xlink:label="loc_us-gaap_OtherAssetsFairValueDisclosure_4514FF261DD40BA6E756063AD53180A8" xlink:type="locator" />
    <presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_algn_FairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisLineItems_47B2375B4FAB4110CFD9063AD5317B24" xlink:to="loc_us-gaap_OtherAssetsFairValueDisclosure_4514FF261DD40BA6E756063AD53180A8" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_AssetsFairValueDisclosure" xlink:label="loc_us-gaap_AssetsFairValueDisclosure_457A60D9C3BF98076C64063AD5317D1C" xlink:type="locator" />
    <presentationArc order="4" preferredLabel="http://www.xbrl.org/2003/role/totalLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_algn_FairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisLineItems_47B2375B4FAB4110CFD9063AD5317B24" xlink:to="loc_us-gaap_AssetsFairValueDisclosure_457A60D9C3BF98076C64063AD5317D1C" xlink:type="arc" />
  </presentationLink>
  <presentationLink xlink:role="http://www.aligntech.com/role/SummaryOfMsuPerformanceDetails" xlink:type="extended">
    <loc xlink:href="algn-20150331.xsd#algn_DisclosureSummaryOfMSUPerformanceAbstract" xlink:label="loc_algn_DisclosureSummaryOfMSUPerformanceAbstract_DA447776EF5313A796846B71CCA0EA62" xlink:type="locator" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable" xlink:label="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_9C6D7CAC876601F5FB466B71CCA0D70A" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_algn_DisclosureSummaryOfMSUPerformanceAbstract_DA447776EF5313A796846B71CCA0EA62" xlink:to="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_9C6D7CAC876601F5FB466B71CCA0D70A" xlink:type="arc" />
    <loc xlink:href="http://xbrl.sec.gov/dei/2014/dei-2014-01-31.xsd#dei_LegalEntityAxis" xlink:label="loc_dei_LegalEntityAxis_AC33ED4ADAEBF6AF03276B71CCA1DCBA" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_9C6D7CAC876601F5FB466B71CCA0D70A" xlink:to="loc_dei_LegalEntityAxis_AC33ED4ADAEBF6AF03276B71CCA1DCBA" xlink:type="arc" />
    <loc xlink:href="http://xbrl.sec.gov/dei/2014/dei-2014-01-31.xsd#dei_EntityDomain" xlink:label="loc_dei_EntityDomain_E1C9F47CAA1BF95A457F6B71CCA1AC6A" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_LegalEntityAxis_AC33ED4ADAEBF6AF03276B71CCA1DCBA" xlink:to="loc_dei_EntityDomain_E1C9F47CAA1BF95A457F6B71CCA1AC6A" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_AwardTypeAxis" xlink:label="loc_us-gaap_AwardTypeAxis_7E120239AC6E3E10F7736B71CCA1F18A" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_9C6D7CAC876601F5FB466B71CCA0D70A" xlink:to="loc_us-gaap_AwardTypeAxis_7E120239AC6E3E10F7736B71CCA1F18A" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_D56E0EB2B510C944B90C6B71CCA1B77E" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_AwardTypeAxis_7E120239AC6E3E10F7736B71CCA1F18A" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_D56E0EB2B510C944B90C6B71CCA1B77E" xlink:type="arc" />
    <loc xlink:href="algn-20150331.xsd#algn_MarketPerformanceBasedRestrictedStockUnitsMember" xlink:label="loc_algn_MarketPerformanceBasedRestrictedStockUnitsMember_77170B1418289EB8F6256B71CCA12CC1" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_D56E0EB2B510C944B90C6B71CCA1B77E" xlink:to="loc_algn_MarketPerformanceBasedRestrictedStockUnitsMember_77170B1418289EB8F6256B71CCA12CC1" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_2FE96C4430FB77E1C1496B71CCA1A4B6" xlink:type="locator" />
    <presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_9C6D7CAC876601F5FB466B71CCA0D70A" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_2FE96C4430FB77E1C1496B71CCA1A4B6" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward_440ECD1E69599A5863DF6B71CCA16607" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_2FE96C4430FB77E1C1496B71CCA1A4B6" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward_440ECD1E69599A5863DF6B71CCA16607" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber_1E3B8DDE9F8E5086FBA66B71CCA1206D" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/periodStartLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward_440ECD1E69599A5863DF6B71CCA16607" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber_1E3B8DDE9F8E5086FBA66B71CCA1206D" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod_DFD4A925B06CCB8DD6586B71CCA1AD2A" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward_440ECD1E69599A5863DF6B71CCA16607" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod_DFD4A925B06CCB8DD6586B71CCA1AD2A" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod_DAB298A3E82A3DC4319A6B71CCA153EB" xlink:type="locator" />
    <presentationArc order="3" preferredLabel="http://www.xbrl.org/2009/role/negatedLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward_440ECD1E69599A5863DF6B71CCA16607" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod_DAB298A3E82A3DC4319A6B71CCA153EB" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod_F0AB045604C31057005C6B71CCA15DC5" xlink:type="locator" />
    <presentationArc order="4" preferredLabel="http://www.xbrl.org/2009/role/negatedLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward_440ECD1E69599A5863DF6B71CCA16607" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod_F0AB045604C31057005C6B71CCA15DC5" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber_ABFEA2E661962449832F6B71CCA131C7" xlink:type="locator" />
    <presentationArc order="5" preferredLabel="http://www.xbrl.org/2003/role/periodEndLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward_440ECD1E69599A5863DF6B71CCA16607" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber_ABFEA2E661962449832F6B71CCA131C7" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward_A87E8A694868C16419496B71CCA1A3FD" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/periodStartLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_2FE96C4430FB77E1C1496B71CCA1A4B6" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward_A87E8A694868C16419496B71CCA1A3FD" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue_141F822E2C2E8292844A6B71CCA172B7" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/periodStartLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward_A87E8A694868C16419496B71CCA1A3FD" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue_141F822E2C2E8292844A6B71CCA172B7" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue_13044EAEE8491F548D1A6B71CCA1ABC2" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward_A87E8A694868C16419496B71CCA1A3FD" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue_13044EAEE8491F548D1A6B71CCA1ABC2" xlink:type="arc" />
    <loc xlink:href="algn-20150331.xsd#algn_SharebasedCompensationArrangementBySharebasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedAndReleasedInPeriodWeightedAverageGrantDateFairValue" xlink:label="loc_algn_SharebasedCompensationArrangementBySharebasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedAndReleasedInPeriodWeightedAverageGrantDateFairValue_7E0E0C2037EFE6E915696B71CCA1CE53" xlink:type="locator" />
    <presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward_A87E8A694868C16419496B71CCA1A3FD" xlink:to="loc_algn_SharebasedCompensationArrangementBySharebasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedAndReleasedInPeriodWeightedAverageGrantDateFairValue_7E0E0C2037EFE6E915696B71CCA1CE53" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue_1FCD1ABBAF5ED6B1652C6B71CCA16E5E" xlink:type="locator" />
    <presentationArc order="4" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward_A87E8A694868C16419496B71CCA1A3FD" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue_1FCD1ABBAF5ED6B1652C6B71CCA16E5E" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue_34968DD951A7812922DF6B71CCA172FB" xlink:type="locator" />
    <presentationArc order="5" preferredLabel="http://www.xbrl.org/2003/role/periodEndLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward_A87E8A694868C16419496B71CCA1A3FD" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue_34968DD951A7812922DF6B71CCA172FB" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsAdditionalDisclosuresAbstract" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsAdditionalDisclosuresAbstract_8737C5F728DD1ECACF946B71CCA18618" xlink:type="locator" />
    <presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_2FE96C4430FB77E1C1496B71CCA1A4B6" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsAdditionalDisclosuresAbstract_8737C5F728DD1ECACF946B71CCA18618" xlink:type="arc" />
    <loc xlink:href="algn-20150331.xsd#algn_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsOutstandingWeightedAverageRemainingContractualTerm1" xlink:label="loc_algn_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsOutstandingWeightedAverageRemainingContractualTerm1_F5668FC53636C2A4541F6B71CCA211F9" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/periodEndLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsAdditionalDisclosuresAbstract_8737C5F728DD1ECACF946B71CCA18618" xlink:to="loc_algn_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsOutstandingWeightedAverageRemainingContractualTerm1_F5668FC53636C2A4541F6B71CCA211F9" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardEquityInstrumentsOtherThanOptionsAggregateIntrinsicValueAbstract" xlink:label="loc_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardEquityInstrumentsOtherThanOptionsAggregateIntrinsicValueAbstract_F64C665B205CAB232D0F6B71CCA265D5" xlink:type="locator" />
    <presentationArc order="4" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_2FE96C4430FB77E1C1496B71CCA1A4B6" xlink:to="loc_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardEquityInstrumentsOtherThanOptionsAggregateIntrinsicValueAbstract_F64C665B205CAB232D0F6B71CCA265D5" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardEquityInstrumentsOtherThanOptionsAggregateIntrinsicValueOutstanding" xlink:label="loc_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardEquityInstrumentsOtherThanOptionsAggregateIntrinsicValueOutstanding_10418BA345666939DC1F6B71CCA2FD1E" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/periodEndLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardEquityInstrumentsOtherThanOptionsAggregateIntrinsicValueAbstract_F64C665B205CAB232D0F6B71CCA265D5" xlink:to="loc_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardEquityInstrumentsOtherThanOptionsAggregateIntrinsicValueOutstanding_10418BA345666939DC1F6B71CCA2FD1E" xlink:type="arc" />
  </presentationLink>
  <presentationLink xlink:role="http://www.aligntech.com/role/SummaryOfNonvestedSharesDetails" xlink:type="extended">
    <loc xlink:href="algn-20150331.xsd#algn_DisclosureSummaryOfNonvestedSharesAbstract" xlink:label="loc_algn_DisclosureSummaryOfNonvestedSharesAbstract_63D014D4BD77289C63F36B71CCA7F86C" xlink:type="locator" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable" xlink:label="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_C507B9578AEBF60F9A766B71CCA70B87" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_algn_DisclosureSummaryOfNonvestedSharesAbstract_63D014D4BD77289C63F36B71CCA7F86C" xlink:to="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_C507B9578AEBF60F9A766B71CCA70B87" xlink:type="arc" />
    <loc xlink:href="http://xbrl.sec.gov/dei/2014/dei-2014-01-31.xsd#dei_LegalEntityAxis" xlink:label="loc_dei_LegalEntityAxis_4AD6D5F5BEE3B5F251006B71CCA7F03C" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_C507B9578AEBF60F9A766B71CCA70B87" xlink:to="loc_dei_LegalEntityAxis_4AD6D5F5BEE3B5F251006B71CCA7F03C" xlink:type="arc" />
    <loc xlink:href="http://xbrl.sec.gov/dei/2014/dei-2014-01-31.xsd#dei_EntityDomain" xlink:label="loc_dei_EntityDomain_73F3537E9AC7EB14ECFB6B71CCA7F30F" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_LegalEntityAxis_4AD6D5F5BEE3B5F251006B71CCA7F03C" xlink:to="loc_dei_EntityDomain_73F3537E9AC7EB14ECFB6B71CCA7F30F" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_AwardTypeAxis" xlink:label="loc_us-gaap_AwardTypeAxis_C96B3F5C47269066EFAE6B71CCA7D5C9" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_C507B9578AEBF60F9A766B71CCA70B87" xlink:to="loc_us-gaap_AwardTypeAxis_C96B3F5C47269066EFAE6B71CCA7D5C9" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_21B645DE7A100E6F93476B71CCA7A045" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_AwardTypeAxis_C96B3F5C47269066EFAE6B71CCA7D5C9" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_21B645DE7A100E6F93476B71CCA7A045" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_RestrictedStockUnitsRSUMember" xlink:label="loc_us-gaap_RestrictedStockUnitsRSUMember_404FB98C4BDB8A3E59746B71CCA773D0" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_21B645DE7A100E6F93476B71CCA7A045" xlink:to="loc_us-gaap_RestrictedStockUnitsRSUMember_404FB98C4BDB8A3E59746B71CCA773D0" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_030775DB613911B0B6686B71CCA728D8" xlink:type="locator" />
    <presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_C507B9578AEBF60F9A766B71CCA70B87" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_030775DB613911B0B6686B71CCA728D8" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward_6ABF0F19F31A0181B4A16B71CCA72550" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_030775DB613911B0B6686B71CCA728D8" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward_6ABF0F19F31A0181B4A16B71CCA72550" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber_8FF73628DD4E35C54F1D6B71CCA87A73" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/periodStartLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward_6ABF0F19F31A0181B4A16B71CCA72550" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber_8FF73628DD4E35C54F1D6B71CCA87A73" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod_E631860DFA670D88FE656B71CCA8C3B1" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward_6ABF0F19F31A0181B4A16B71CCA72550" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod_E631860DFA670D88FE656B71CCA8C3B1" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod_7F65C1518DB72E5FDDBC6B71CCA80328" xlink:type="locator" />
    <presentationArc order="3" preferredLabel="http://www.xbrl.org/2009/role/negatedLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward_6ABF0F19F31A0181B4A16B71CCA72550" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod_7F65C1518DB72E5FDDBC6B71CCA80328" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod_0F7C550D929855F1ABD46B71CCA85AD3" xlink:type="locator" />
    <presentationArc order="4" preferredLabel="http://www.xbrl.org/2009/role/negatedLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward_6ABF0F19F31A0181B4A16B71CCA72550" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod_0F7C550D929855F1ABD46B71CCA85AD3" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber_78DF95648D9FBD1CACA76B71CCA8DC52" xlink:type="locator" />
    <presentationArc order="5" preferredLabel="http://www.xbrl.org/2003/role/periodEndLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward_6ABF0F19F31A0181B4A16B71CCA72550" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber_78DF95648D9FBD1CACA76B71CCA8DC52" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward_EDD0545A5E39ED66C9576B71CCA86F55" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_030775DB613911B0B6686B71CCA728D8" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward_EDD0545A5E39ED66C9576B71CCA86F55" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue_8027AAB1AD44EA90424C6B71CCA8749F" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/periodStartLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward_EDD0545A5E39ED66C9576B71CCA86F55" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue_8027AAB1AD44EA90424C6B71CCA8749F" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue_A1B4F6C9D63EC47263EF6B71CCA84378" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward_EDD0545A5E39ED66C9576B71CCA86F55" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue_A1B4F6C9D63EC47263EF6B71CCA84378" xlink:type="arc" />
    <loc xlink:href="algn-20150331.xsd#algn_SharebasedCompensationArrangementBySharebasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedAndReleasedInPeriodWeightedAverageGrantDateFairValue" xlink:label="loc_algn_SharebasedCompensationArrangementBySharebasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedAndReleasedInPeriodWeightedAverageGrantDateFairValue_953D30058320880A2C4D6B71CCA808B0" xlink:type="locator" />
    <presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward_EDD0545A5E39ED66C9576B71CCA86F55" xlink:to="loc_algn_SharebasedCompensationArrangementBySharebasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedAndReleasedInPeriodWeightedAverageGrantDateFairValue_953D30058320880A2C4D6B71CCA808B0" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue_AE752CFA0B52057C020A6B71CCA86C8A" xlink:type="locator" />
    <presentationArc order="4" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward_EDD0545A5E39ED66C9576B71CCA86F55" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue_AE752CFA0B52057C020A6B71CCA86C8A" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue_B30B51E1D2C471371E606B71CCA8A62D" xlink:type="locator" />
    <presentationArc order="5" preferredLabel="http://www.xbrl.org/2003/role/periodEndLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward_EDD0545A5E39ED66C9576B71CCA86F55" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue_B30B51E1D2C471371E606B71CCA8A62D" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsAdditionalDisclosuresAbstract" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsAdditionalDisclosuresAbstract_7613992CBCDD04BC800B6B71CCA8BC57" xlink:type="locator" />
    <presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_030775DB613911B0B6686B71CCA728D8" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsAdditionalDisclosuresAbstract_7613992CBCDD04BC800B6B71CCA8BC57" xlink:type="arc" />
    <loc xlink:href="algn-20150331.xsd#algn_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsOutstandingWeightedAverageRemainingContractualTerm1" xlink:label="loc_algn_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsOutstandingWeightedAverageRemainingContractualTerm1_F8D8FD150AE68361EA776B71CCA81713" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/periodEndLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsAdditionalDisclosuresAbstract_7613992CBCDD04BC800B6B71CCA8BC57" xlink:to="loc_algn_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsOutstandingWeightedAverageRemainingContractualTerm1_F8D8FD150AE68361EA776B71CCA81713" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardEquityInstrumentsOtherThanOptionsAggregateIntrinsicValueAbstract" xlink:label="loc_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardEquityInstrumentsOtherThanOptionsAggregateIntrinsicValueAbstract_3F73709AC00760D7E4776B71CCA899CC" xlink:type="locator" />
    <presentationArc order="4" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_030775DB613911B0B6686B71CCA728D8" xlink:to="loc_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardEquityInstrumentsOtherThanOptionsAggregateIntrinsicValueAbstract_3F73709AC00760D7E4776B71CCA899CC" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardEquityInstrumentsOtherThanOptionsAggregateIntrinsicValueOutstanding" xlink:label="loc_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardEquityInstrumentsOtherThanOptionsAggregateIntrinsicValueOutstanding_D53406E4D6263D1D2E266B71CCA86FC6" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/periodEndLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardEquityInstrumentsOtherThanOptionsAggregateIntrinsicValueAbstract_3F73709AC00760D7E4776B71CCA899CC" xlink:to="loc_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardEquityInstrumentsOtherThanOptionsAggregateIntrinsicValueOutstanding_D53406E4D6263D1D2E266B71CCA86FC6" xlink:type="arc" />
  </presentationLink>
  <presentationLink xlink:role="http://www.aligntech.com/role/SummaryOfSignificantAccountingPolicies" xlink:type="extended">
    <loc xlink:href="algn-20150331.xsd#algn_NotesToFinancialStatementsAbstract" xlink:label="loc_algn_NotesToFinancialStatementsAbstract_E4BA146AA51541563DB56B6F60E27EF5" xlink:type="locator" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_SignificantAccountingPoliciesTextBlock" xlink:label="loc_us-gaap_SignificantAccountingPoliciesTextBlock_6E7CCFAD92A1DAE8E6DF6B6F60E208B8" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_algn_NotesToFinancialStatementsAbstract_E4BA146AA51541563DB56B6F60E27EF5" xlink:to="loc_us-gaap_SignificantAccountingPoliciesTextBlock_6E7CCFAD92A1DAE8E6DF6B6F60E208B8" xlink:type="arc" />
  </presentationLink>
  <presentationLink xlink:role="http://www.aligntech.com/role/SummaryOfSignificantAccountingPoliciesPolicies" xlink:type="extended">
    <loc xlink:href="algn-20150331.xsd#algn_NotesToFinancialStatementsAbstract" xlink:label="loc_algn_NotesToFinancialStatementsAbstract_DE5A514B8A6EE1E2D5F46B6F61C30DE1" xlink:type="locator" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_BasisOfAccountingPolicyPolicyTextBlock" xlink:label="loc_us-gaap_BasisOfAccountingPolicyPolicyTextBlock_2743A4878B7312A61CF76B6F61C3494C" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_algn_NotesToFinancialStatementsAbstract_DE5A514B8A6EE1E2D5F46B6F61C30DE1" xlink:to="loc_us-gaap_BasisOfAccountingPolicyPolicyTextBlock_2743A4878B7312A61CF76B6F61C3494C" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_UseOfEstimates" xlink:label="loc_us-gaap_UseOfEstimates_92215DD5F66BE2B64A316B6F61C3A960" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_algn_NotesToFinancialStatementsAbstract_DE5A514B8A6EE1E2D5F46B6F61C30DE1" xlink:to="loc_us-gaap_UseOfEstimates_92215DD5F66BE2B64A316B6F61C3A960" xlink:type="arc" />
    <loc xlink:href="algn-20150331.xsd#algn_RecentAccountingPronouncementsPolicyTextBlock" xlink:label="loc_algn_RecentAccountingPronouncementsPolicyTextBlock_4C3CD5A7A48A6F5DB5876B6F61C39491" xlink:type="locator" />
    <presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_algn_NotesToFinancialStatementsAbstract_DE5A514B8A6EE1E2D5F46B6F61C30DE1" xlink:to="loc_algn_RecentAccountingPronouncementsPolicyTextBlock_4C3CD5A7A48A6F5DB5876B6F61C39491" xlink:type="arc" />
  </presentationLink>
  <presentationLink xlink:role="http://www.aligntech.com/role/TotalEstimatedAnnualFutureAmortizationExpenseForAcquiredIntangibleAssetsDetails" xlink:type="extended">
    <loc xlink:href="algn-20150331.xsd#algn_DisclosureTotalEstimatedAnnualFutureAmortizationExpenseForAcquiredIntangibleAssetsAbstract" xlink:label="loc_algn_DisclosureTotalEstimatedAnnualFutureAmortizationExpenseForAcquiredIntangibleAssetsAbstract_3ECF95636E1F9FE0921A6B71CCEF0A4A" xlink:type="locator" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseRemainderOfFiscalYear" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseRemainderOfFiscalYear_14932D8D0ADD1FA75B0E6B71CCEFC16F" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_algn_DisclosureTotalEstimatedAnnualFutureAmortizationExpenseForAcquiredIntangibleAssetsAbstract_3ECF95636E1F9FE0921A6B71CCEF0A4A" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseRemainderOfFiscalYear_14932D8D0ADD1FA75B0E6B71CCEFC16F" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo_2C1E452C48E1D2321FBD6B71CCEF2A24" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_algn_DisclosureTotalEstimatedAnnualFutureAmortizationExpenseForAcquiredIntangibleAssetsAbstract_3ECF95636E1F9FE0921A6B71CCEF0A4A" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo_2C1E452C48E1D2321FBD6B71CCEF2A24" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearThree" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearThree_2D10F0D37AA8FE8144596B71CCEFA4A2" xlink:type="locator" />
    <presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_algn_DisclosureTotalEstimatedAnnualFutureAmortizationExpenseForAcquiredIntangibleAssetsAbstract_3ECF95636E1F9FE0921A6B71CCEF0A4A" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearThree_2D10F0D37AA8FE8144596B71CCEFA4A2" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFour" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFour_DA09DA6E374CF17554BD6B71CCF0AF92" xlink:type="locator" />
    <presentationArc order="4" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_algn_DisclosureTotalEstimatedAnnualFutureAmortizationExpenseForAcquiredIntangibleAssetsAbstract_3ECF95636E1F9FE0921A6B71CCEF0A4A" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFour_DA09DA6E374CF17554BD6B71CCF0AF92" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFive" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFive_9CBB2869ED0FE3B9B7736B71CCF0A61B" xlink:type="locator" />
    <presentationArc order="5" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_algn_DisclosureTotalEstimatedAnnualFutureAmortizationExpenseForAcquiredIntangibleAssetsAbstract_3ECF95636E1F9FE0921A6B71CCEF0A4A" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFive_9CBB2869ED0FE3B9B7736B71CCF0A61B" xlink:type="arc" />
    <loc xlink:href="algn-20150331.xsd#algn_FutureAmortizationExpenseThereafter" xlink:label="loc_algn_FutureAmortizationExpenseThereafter_6ACBA8BD409B99B69D8E6B71CCF0FFD5" xlink:type="locator" />
    <presentationArc order="6" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_algn_DisclosureTotalEstimatedAnnualFutureAmortizationExpenseForAcquiredIntangibleAssetsAbstract_3ECF95636E1F9FE0921A6B71CCEF0A4A" xlink:to="loc_algn_FutureAmortizationExpenseThereafter_6ACBA8BD409B99B69D8E6B71CCF0FFD5" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsNet" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsNet_48F3A9CBA4EC2BFDBCBE6B71CCF06339" xlink:type="locator" />
    <presentationArc order="7" preferredLabel="http://www.xbrl.org/2003/role/totalLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_algn_DisclosureTotalEstimatedAnnualFutureAmortizationExpenseForAcquiredIntangibleAssetsAbstract_3ECF95636E1F9FE0921A6B71CCEF0A4A" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsNet_48F3A9CBA4EC2BFDBCBE6B71CCF06339" xlink:type="arc" />
  </presentationLink>
  <presentationLink xlink:role="http://www.aligntech.com/role/WarrantyAccrualActivityDetails" xlink:type="extended">
    <loc xlink:href="algn-20150331.xsd#algn_DisclosureWarrantyAccrualActivityAbstract" xlink:label="loc_algn_DisclosureWarrantyAccrualActivityAbstract_B43F3A0374F733E564496B6F61A69F33" xlink:type="locator" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_MovementInStandardProductWarrantyAccrualRollForward" xlink:label="loc_us-gaap_MovementInStandardProductWarrantyAccrualRollForward_6F8E3EEA9E44DC113ACB6B6F61A675CA" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_algn_DisclosureWarrantyAccrualActivityAbstract_B43F3A0374F733E564496B6F61A69F33" xlink:to="loc_us-gaap_MovementInStandardProductWarrantyAccrualRollForward_6F8E3EEA9E44DC113ACB6B6F61A675CA" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_StandardProductWarrantyAccrual" xlink:label="loc_us-gaap_StandardProductWarrantyAccrual_BDA9BAA83E0D023AC1996B6F61A63C54" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/periodStartLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_MovementInStandardProductWarrantyAccrualRollForward_6F8E3EEA9E44DC113ACB6B6F61A675CA" xlink:to="loc_us-gaap_StandardProductWarrantyAccrual_BDA9BAA83E0D023AC1996B6F61A63C54" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_StandardProductWarrantyAccrualWarrantiesIssued" xlink:label="loc_us-gaap_StandardProductWarrantyAccrualWarrantiesIssued_38837BE42F520C0501426B6F61A6F837" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_MovementInStandardProductWarrantyAccrualRollForward_6F8E3EEA9E44DC113ACB6B6F61A675CA" xlink:to="loc_us-gaap_StandardProductWarrantyAccrualWarrantiesIssued_38837BE42F520C0501426B6F61A6F837" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_StandardProductWarrantyAccrualPayments" xlink:label="loc_us-gaap_StandardProductWarrantyAccrualPayments_3623FD8FD775DE3A16AE6B6F61A690EC" xlink:type="locator" />
    <presentationArc order="3" preferredLabel="http://www.xbrl.org/2009/role/negatedLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_MovementInStandardProductWarrantyAccrualRollForward_6F8E3EEA9E44DC113ACB6B6F61A675CA" xlink:to="loc_us-gaap_StandardProductWarrantyAccrualPayments_3623FD8FD775DE3A16AE6B6F61A690EC" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_StandardProductWarrantyAccrual" xlink:label="loc_us-gaap_StandardProductWarrantyAccrual_EB675D1A33557BB86FA86B6F61A67B12" xlink:type="locator" />
    <presentationArc order="4" preferredLabel="http://www.xbrl.org/2003/role/periodEndLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_MovementInStandardProductWarrantyAccrualRollForward_6F8E3EEA9E44DC113ACB6B6F61A675CA" xlink:to="loc_us-gaap_StandardProductWarrantyAccrual_EB675D1A33557BB86FA86B6F61A67B12" xlink:type="arc" />
  </presentationLink>
</linkbase>





