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        <link:definition>9952157 - Disclosure - THE COMPANY</link:definition>
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        <link:definition>9952158 - Disclosure - SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES</link:definition>
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        <link:definition>9952159 - Disclosure - REVENUE</link:definition>
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        <link:definition>9952160 - Disclosure - BUSINESS COMBINATION</link:definition>
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        <link:definition>9952161 - Disclosure - GOODWILL AND INTANGIBLE ASSETS</link:definition>
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        <link:definition>9952162 - Disclosure - BALANCE SHEET COMPONENTS</link:definition>
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        <link:definition>9952164 - Disclosure - STRATEGIC INVESTMENTS</link:definition>
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        <link:definition>9952165 - Disclosure - FAIR VALUE DISCLOSURE</link:definition>
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        <link:definition>9952166 - Disclosure - LEASES</link:definition>
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        <link:definition>9952167 - Disclosure - DEBT</link:definition>
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        <link:definition>9952168 - Disclosure - STOCKHOLDERS&#8217; EQUITY</link:definition>
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        <link:definition>9952169 - Disclosure - COMMITMENTS AND CONTINGENCIES</link:definition>
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        <link:definition>9952170 - Disclosure - INCOME TAXES</link:definition>
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      <link:roleType id="NETINCOMELOSSPERSHARE" roleURI="http://www.roku.com/role/NETINCOMELOSSPERSHARE">
        <link:definition>9952171 - Disclosure - NET INCOME (LOSS) PER SHARE</link:definition>
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        <link:definition>9952172 - Disclosure - SEGMENT INFORMATION</link:definition>
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        <link:definition>9955511 - Disclosure - SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Policies)</link:definition>
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        <link:definition>9955512 - Disclosure - REVENUE (Tables)</link:definition>
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        <link:definition>9955513 - Disclosure - GOODWILL AND INTANGIBLE ASSETS (Tables)</link:definition>
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        <link:definition>9955514 - Disclosure - BALANCE SHEET COMPONENTS (Tables)</link:definition>
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        <link:definition>9955515 - Disclosure - CONTENT ASSETS (Tables)</link:definition>
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        <link:definition>9955516 - Disclosure - FAIR VALUE DISCLOSURE (Tables)</link:definition>
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        <link:usedOn>link:calculationLink</link:usedOn>
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        <link:definition>9955517 - Disclosure - LEASES (Tables)</link:definition>
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        <link:definition>9955518 - Disclosure - STOCKHOLDERS&#8217; EQUITY (Tables)</link:definition>
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        <link:definition>9955519 - Disclosure - COMMITMENTS AND CONTINGENCIES (Tables)</link:definition>
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        <link:definition>9955520 - Disclosure - NET INCOME (LOSS) PER SHARE (Tables)</link:definition>
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      <link:roleType id="SEGMENTINFORMATIONTables" roleURI="http://www.roku.com/role/SEGMENTINFORMATIONTables">
        <link:definition>9955521 - Disclosure - SEGMENT INFORMATION (Tables)</link:definition>
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        <link:usedOn>link:calculationLink</link:usedOn>
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      <link:roleType id="THECOMPANYDetails" roleURI="http://www.roku.com/role/THECOMPANYDetails">
        <link:definition>9955522 - Disclosure - THE COMPANY (Details)</link:definition>
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      <link:roleType id="SUMMARYOFSIGNIFICANTACCOUNTINGPOLICIESDetails" roleURI="http://www.roku.com/role/SUMMARYOFSIGNIFICANTACCOUNTINGPOLICIESDetails">
        <link:definition>9955523 - Disclosure - SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Details)</link:definition>
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        <link:definition>9955524 - Disclosure - REVENUE - Narrative (Details)</link:definition>
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        <link:definition>9955524 - Disclosure - REVENUE - Narrative (Details)</link:definition>
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        <link:definition>9955525 - Disclosure - REVENUE - Schedule of Contract Balances (Details)</link:definition>
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        <link:definition>9955526 - Disclosure - BUSINESS COMBINATION (Details)</link:definition>
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        <link:usedOn>link:calculationLink</link:usedOn>
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      <link:roleType id="GOODWILLANDINTANGIBLEASSETSNarrativeDetails" roleURI="http://www.roku.com/role/GOODWILLANDINTANGIBLEASSETSNarrativeDetails">
        <link:definition>9955527 - Disclosure - GOODWILL AND INTANGIBLE ASSETS - Narrative (Details)</link:definition>
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        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="GOODWILLANDINTANGIBLEASSETSSummaryofIntangibleAssetsDetails" roleURI="http://www.roku.com/role/GOODWILLANDINTANGIBLEASSETSSummaryofIntangibleAssetsDetails">
        <link:definition>9955528 - Disclosure - GOODWILL AND INTANGIBLE ASSETS - Summary of Intangible Assets (Details)</link:definition>
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        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="GOODWILLANDINTANGIBLEASSETSSummaryofIntangibleAssetsDetails_1" roleURI="http://www.roku.com/role/GOODWILLANDINTANGIBLEASSETSSummaryofIntangibleAssetsDetails_1">
        <link:definition>9955528 - Disclosure - GOODWILL AND INTANGIBLE ASSETS - Summary of Intangible Assets (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="GOODWILLANDINTANGIBLEASSETSScheduleofEstimatedFutureAmortizationExpenseforIntangibleAssetDetails" roleURI="http://www.roku.com/role/GOODWILLANDINTANGIBLEASSETSScheduleofEstimatedFutureAmortizationExpenseforIntangibleAssetDetails">
        <link:definition>9955529 - Disclosure - GOODWILL AND INTANGIBLE ASSETS - Schedule of Estimated Future Amortization Expense for Intangible Asset (Details)</link:definition>
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        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="BALANCESHEETCOMPONENTSNarrativeDetails" roleURI="http://www.roku.com/role/BALANCESHEETCOMPONENTSNarrativeDetails">
        <link:definition>9955530 - Disclosure - BALANCE SHEET COMPONENTS - Narrative (Details)</link:definition>
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        <link:usedOn>link:definitionLink</link:usedOn>
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      <link:roleType id="BALANCESHEETCOMPONENTSScheduleofAccountsReceivableNetDetails" roleURI="http://www.roku.com/role/BALANCESHEETCOMPONENTSScheduleofAccountsReceivableNetDetails">
        <link:definition>9955531 - Disclosure - BALANCE SHEET COMPONENTS - Schedule of Accounts Receivable, Net (Details)</link:definition>
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      <link:roleType id="BALANCESHEETCOMPONENTSScheduleofPropertyandEquipmentNetDetails" roleURI="http://www.roku.com/role/BALANCESHEETCOMPONENTSScheduleofPropertyandEquipmentNetDetails">
        <link:definition>9955532 - Disclosure - BALANCE SHEET COMPONENTS - Schedule of Property and Equipment, Net (Details)</link:definition>
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      <link:roleType id="BALANCESHEETCOMPONENTSScheduleofAccruedLiabilitiesDetails" roleURI="http://www.roku.com/role/BALANCESHEETCOMPONENTSScheduleofAccruedLiabilitiesDetails">
        <link:definition>9955533 - Disclosure - BALANCE SHEET COMPONENTS - Schedule of Accrued Liabilities (Details)</link:definition>
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      <link:roleType id="BALANCESHEETCOMPONENTSScheduleofOtherLongTermLiabilitiesDetails" roleURI="http://www.roku.com/role/BALANCESHEETCOMPONENTSScheduleofOtherLongTermLiabilitiesDetails">
        <link:definition>9955534 - Disclosure - BALANCE SHEET COMPONENTS - Schedule of Other Long Term Liabilities (Details)</link:definition>
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  <xs:element id="roku_LicensedAndProducedPrepaidCurrentContentAssets" abstract="false" name="LicensedAndProducedPrepaidCurrentContentAssets" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="roku_LicensedAndProducedPrepaidNonCurrentContentAssets" abstract="false" name="LicensedAndProducedPrepaidNonCurrentContentAssets" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="roku_AmortizationExpenseOfLicensedContentAssets" abstract="false" name="AmortizationExpenseOfLicensedContentAssets" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="roku_AmortizationExpenseOfProducedContentAssets" abstract="false" name="AmortizationExpenseOfProducedContentAssets" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="roku_AmortizationExpenseOfContentAssets" abstract="false" name="AmortizationExpenseOfContentAssets" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="roku_RepaymentOfConvertibleNoteInvestingActivities" abstract="false" name="RepaymentOfConvertibleNoteInvestingActivities" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="roku_LeasesTable" abstract="true" name="LeasesTable" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrldt:hypercubeItem" type="xbrli:stringItemType"/>
  <xs:element id="roku_LeasesLineItems" abstract="true" name="LeasesLineItems" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="roku_RemainingLeaseTermOperatingLease" abstract="false" name="RemainingLeaseTermOperatingLease" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:durationItemType"/>
  <xs:element id="roku_RightOfUseAssetsObtainedInExchangeForLeaseObligationsAbstract" abstract="true" name="RightOfUseAssetsObtainedInExchangeForLeaseObligationsAbstract" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="roku_LesseeOperatingLeaseLiabilityToBePaidAfterYearFour" abstract="false" name="LesseeOperatingLeaseLiabilityToBePaidAfterYearFour" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="roku_ExpectedTenantImprovementAllowance" abstract="false" name="ExpectedTenantImprovementAllowance" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="roku_TermLoanAFacilityMember" abstract="true" name="TermLoanAFacilityMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="roku_CreditAgreementMember" abstract="true" name="CreditAgreementMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="roku_LineOfCreditFacilityAdditionalBorrowingCapacity" abstract="false" name="LineOfCreditFacilityAdditionalBorrowingCapacity" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="roku_NumberOfClassesOfCommonStock" abstract="false" name="NumberOfClassesOfCommonStock" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:integerItemType"/>
  <xs:element id="roku_CommonStockVotingRightsNumberOfVotesPerShare" abstract="false" name="CommonStockVotingRightsNumberOfVotesPerShare" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="xbrli:integerItemType"/>
  <xs:element id="roku_EquityIncentivePlanMember" abstract="true" name="EquityIncentivePlanMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="roku_TwoThousandSeventeenEmployeeStockPurchasePlanMember" abstract="true" name="TwoThousandSeventeenEmployeeStockPurchasePlanMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="roku_TwoThousandSeventeenEquityIncentivePlanMember" abstract="true" name="TwoThousandSeventeenEquityIncentivePlanMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="roku_CumulativeCommonStockAwardsGranted" abstract="false" name="CumulativeCommonStockAwardsGranted" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="xbrli:sharesItemType"/>
  <xs:element id="roku_CumulativeCommonStockAwardsAvailableForIssuance" abstract="false" name="CumulativeCommonStockAwardsAvailableForIssuance" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="xbrli:sharesItemType"/>
  <xs:element id="roku_TenPercentShareholderMember" abstract="true" name="TenPercentShareholderMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="roku_PercentageOfVotingRights" abstract="false" name="PercentageOfVotingRights" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="dtr-types:percentItemType"/>
  <xs:element id="roku_CommitmentsAndContingenciesTable" abstract="true" name="CommitmentsAndContingenciesTable" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrldt:hypercubeItem" type="xbrli:stringItemType"/>
  <xs:element id="roku_ContentMember" abstract="true" name="ContentMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="roku_ManufacturingMember" abstract="true" name="ManufacturingMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="roku_OtherPurchaseCommitmentsMember" abstract="true" name="OtherPurchaseCommitmentsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="roku_CommitmentsAndContingenciesLineItems" abstract="true" name="CommitmentsAndContingenciesLineItems" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="roku_PurchaseObligationDueAfterFourthYear" abstract="false" name="PurchaseObligationDueAfterFourthYear" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="roku_AnthonyWoodMember" abstract="true" name="AnthonyWoodMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
</xs:schema>
