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  <xsd:element id="cmcsa_FairValueOfRedeemablePreferredShares" name="FairValueOfRedeemablePreferredShares" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="instant" />
  <xsd:element abstract="true" id="cmcsa_FilmAndTelevisionCostLineItems" name="FilmAndTelevisionCostLineItems" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="cmcsa_FilmAndTelevisionCostTable" name="FilmAndTelevisionCostTable" nillable="true" substitutionGroup="xbrldt:hypercubeItem" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element id="cmcsa_FilmAndTelevisionCosts" name="FilmAndTelevisionCosts" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="instant" />
  <xsd:element id="cmcsa_FilmAndTelevisionCostsDisclosureTextBlock" name="FilmAndTelevisionCostsDisclosureTextBlock" nillable="true" substitutionGroup="xbrli:item" type="nonnum:textBlockItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="cmcsa_FilmedEntertainmentMember" name="FilmedEntertainmentMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="cmcsa_FranchiseAndOtherRegulatoryFeesMember" name="FranchiseAndOtherRegulatoryFeesMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="cmcsa_GainLossOnInvestmentsAndOtherNoncashIncomeLossNet" name="GainLossOnInvestmentsAndOtherNoncashIncomeLossNet" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="duration" />
  <xsd:element id="cmcsa_GuaranteeObligationsCurrentPrincipalBalance" name="GuaranteeObligationsCurrentPrincipalBalance" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="instant" />
  <xsd:element id="cmcsa_GuaranteeObligationsLineOfCreditFacility" name="GuaranteeObligationsLineOfCreditFacility" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="instant" />
  <xsd:element id="cmcsa_GuaranteeObligationsMaximumCapacityOfCreditFacility" name="GuaranteeObligationsMaximumCapacityOfCreditFacility" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="instant" />
  <xsd:element id="cmcsa_GuaranteeObligationsTermLoans" name="GuaranteeObligationsTermLoans" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="instant" />
  <xsd:element abstract="true" id="cmcsa_HomeEntertainmentMember" name="HomeEntertainmentMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="cmcsa_HuluMember" name="HuluMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="cmcsa_IncomeTaxBenefit2017TaxReformLegislation" name="IncomeTaxBenefit2017TaxReformLegislation" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="duration" />
  <xsd:element id="cmcsa_IncomeTaxBenefit2018TaxReformLegislation" name="IncomeTaxBenefit2018TaxReformLegislation" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="duration" />
  <xsd:element id="cmcsa_Increasedecreaseinfilmandtelevisioncostnet" name="Increasedecreaseinfilmandtelevisioncostnet" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="duration" />
  <xsd:element id="cmcsa_InvestmentsInAndAmountsDueFromSubsidiariesEliminatedUponConsolidation" name="InvestmentsInAndAmountsDueFromSubsidiariesEliminatedUponConsolidation" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="instant" />
  <xsd:element abstract="true" id="cmcsa_InvestmentsLineItems" name="InvestmentsLineItems" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="cmcsa_InvestmentsTable" name="InvestmentsTable" nillable="true" substitutionGroup="xbrldt:hypercubeItem" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="cmcsa_ManagementGrantMember" name="ManagementGrantMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="cmcsa_MemberContribution" name="MemberContribution" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="cmcsa_MembersCapitalMember" name="MembersCapitalMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="cmcsa_NBCUniveralEnterpriseSeniorFloatingRateNotesDue2018Member" name="NBCUniveralEnterpriseSeniorFloatingRateNotesDue2018Member" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="cmcsa_NBCUniversalEnterpriseSenior1.662NotesDue2018Member" name="NBCUniversalEnterpriseSenior1.662NotesDue2018Member" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="cmcsa_NBCUniversalMediaLLCMember" name="NBCUniversalMediaLLCMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="cmcsa_NBCUniversalSegmentsMember" name="NBCUniversalSegmentsMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="cmcsa_NbcuniversalEnterpriseCreditFacilityMember" name="NbcuniversalEnterpriseCreditFacilityMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="cmcsa_NbcuniversalEnterpriseMember" name="NbcuniversalEnterpriseMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="cmcsa_NbcuniversalMediaParentMember" name="NbcuniversalMediaParentMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="cmcsa_NetIncomeLossAttributableToNoncontrollingInterestsAndRedeemableSubsidiaryPreferredStock" name="NetIncomeLossAttributableToNoncontrollingInterestsAndRedeemableSubsidiaryPreferredStock" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element id="cmcsa_NetTransactionsWithAffiliates" name="NetTransactionsWithAffiliates" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element id="cmcsa_NonGuaranteeObligationsCurrentPrincipalBalance" name="NonGuaranteeObligationsCurrentPrincipalBalance" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="instant" />
  <xsd:element id="cmcsa_NoncashInterestExpenseIncomeNet" name="NoncashInterestExpenseIncomeNet" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element id="cmcsa_NotePayableToUltimateParent" name="NotePayableToUltimateParent" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="instant" />
  <xsd:element id="cmcsa_NumberofPreferredStockSeries" name="NumberofPreferredStockSeries" nillable="true" substitutionGroup="xbrli:item" type="xbrli:integerItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="cmcsa_OtherBorrowingsMember" name="OtherBorrowingsMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="cmcsa_OtherIncomeExpenseRelatedParty" name="OtherIncomeExpenseRelatedParty" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="duration" />
  <xsd:element id="cmcsa_OtherIncomeLossNet" name="OtherIncomeLossNet" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="cmcsa_OtherLongTermDebtMember" name="OtherLongTermDebtMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="cmcsa_OtherMember" name="OtherMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="cmcsa_OtherOperatingAndAdministrative" name="OtherOperatingAndAdministrative" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element id="cmcsa_OtherStockholdersEquity" name="OtherStockholdersEquity" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="instant" />
  <xsd:element id="cmcsa_OwnershipInCableHoldingCompanySubsidiaries" name="OwnershipInCableHoldingCompanySubsidiaries" nillable="true" substitutionGroup="xbrli:item" type="num:percentItemType" xbrli:periodType="instant" />
  <xsd:element id="cmcsa_PaymentsForAcquisitionsAndConstructionOfRealEstateProperties" name="PaymentsForAcquisitionsAndConstructionOfRealEstateProperties" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="duration" />
  <xsd:element id="cmcsa_ProceedsFromNoteReceivableIssuedToAndBorrowingsFromUltimateParent" name="ProceedsFromNoteReceivableIssuedToAndBorrowingsFromUltimateParent" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element id="cmcsa_ProceedsFromSalesOfBusinessesAndInvestments" name="ProceedsFromSalesOfBusinessesAndInvestments" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element id="cmcsa_ProgrammingAndProductionCosts" name="ProgrammingAndProductionCosts" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element id="cmcsa_ProgrammingRightsCurrent" name="ProgrammingRightsCurrent" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="instant" />
  <xsd:element id="cmcsa_ProgrammingRightsLessAmortization" name="ProgrammingRightsLessAmortization" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="instant" />
  <xsd:element abstract="true" id="cmcsa_RedeemableNoncontrollingInterestMember" name="RedeemableNoncontrollingInterestMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="cmcsa_RedeemableNoncontrollingInterestsAndRedeemableSubsidiaryPreferredStockMember" name="RedeemableNoncontrollingInterestsAndRedeemableSubsidiaryPreferredStockMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="cmcsa_RelatedPartyAggregatePrincipalAmountSeniorNotesNotSubjectToGuarantee" name="RelatedPartyAggregatePrincipalAmountSeniorNotesNotSubjectToGuarantee" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="instant" />
  <xsd:element id="cmcsa_RelatedPartyCreditFacilityNotSubjectToGuarantee" name="RelatedPartyCreditFacilityNotSubjectToGuarantee" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="instant" />
  <xsd:element id="cmcsa_RelatedPartyLiquidationPreferencePreferredStockNotSubjectToGuarantee" name="RelatedPartyLiquidationPreferencePreferredStockNotSubjectToGuarantee" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="instant" />
  <xsd:element abstract="true" id="cmcsa_ResidentialHighSpeedInternetMember" name="ResidentialHighSpeedInternetMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="cmcsa_ResidentialMember" name="ResidentialMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="cmcsa_ResidentialVideoMember" name="ResidentialVideoMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="cmcsa_ResidentialVoiceMember" name="ResidentialVoiceMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="cmcsa_RevenuePerformanceObligationDescriptionOfPaymentTermsPeriod" name="RevenuePerformanceObligationDescriptionOfPaymentTermsPeriod" nillable="true" substitutionGroup="xbrli:item" type="xbrli:durationItemType" xbrli:periodType="duration" />
  <xsd:element id="cmcsa_RevenuePerformanceObligationDescriptionOfTimingTermOfContract" name="RevenuePerformanceObligationDescriptionOfTimingTermOfContract" nillable="true" substitutionGroup="xbrli:item" type="xbrli:durationItemType" xbrli:periodType="duration" />
  <xsd:element id="cmcsa_ScheduleOfCashCashEquivalentsAndRestrictedCashTableTextBlock" name="ScheduleOfCashCashEquivalentsAndRestrictedCashTableTextBlock" nillable="true" substitutionGroup="xbrli:item" type="nonnum:textBlockItemType" xbrli:periodType="duration" />
  <xsd:element id="cmcsa_ScheduleOfFilmAndTelevisionCostsTableTextBlock" name="ScheduleOfFilmAndTelevisionCostsTableTextBlock" nillable="true" substitutionGroup="xbrli:item" type="nonnum:textBlockItemType" xbrli:periodType="duration" />
  <xsd:element id="cmcsa_ScheduleOfOtherBalanceSheetAccountsTableTextBlock" name="ScheduleOfOtherBalanceSheetAccountsTableTextBlock" nillable="true" substitutionGroup="xbrli:item" type="nonnum:textBlockItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="cmcsa_ScheduleofFairValueMethodInvestmentsLineItems" name="ScheduleofFairValueMethodInvestmentsLineItems" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="cmcsa_ScheduleofFairValueMethodInvestmentsTable" name="ScheduleofFairValueMethodInvestmentsTable" nillable="true" substitutionGroup="xbrldt:hypercubeItem" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="cmcsa_Senior3.55NotesDue2028Member" name="Senior3.55NotesDue2028Member" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="cmcsa_Senior3.90NotesDue2038Member" name="Senior3.90NotesDue2038Member" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="cmcsa_Senior4.00NotesDue2048Member" name="Senior4.00NotesDue2048Member" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="cmcsa_Senior4.25NotesDue2053Member" name="Senior4.25NotesDue2053Member" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="cmcsa_Senior5.875NotesDue2018Member" name="Senior5.875NotesDue2018Member" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="cmcsa_SignificantTransactionsTextBlock" name="SignificantTransactionsTextBlock" nillable="true" substitutionGroup="xbrli:item" type="nonnum:textBlockItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="cmcsa_SkyPLCMember" name="SkyPLCMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="cmcsa_SnapMember" name="SnapMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="cmcsa_SupplementalFinancialInformationAbstract" name="SupplementalFinancialInformationAbstract" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="cmcsa_SupplementalFinancialInformationLineItems" name="SupplementalFinancialInformationLineItems" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="cmcsa_SupplementalFinancialInformationTable" name="SupplementalFinancialInformationTable" nillable="true" substitutionGroup="xbrldt:hypercubeItem" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element id="cmcsa_TemporaryEquityFairValueOfRedeemableSubsidiaryPreferredStock" name="TemporaryEquityFairValueOfRedeemableSubsidiaryPreferredStock" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="instant" />
  <xsd:element id="cmcsa_TheatricalFilmCostsInProductionAndInDevelopment" name="TheatricalFilmCostsInProductionAndInDevelopment" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="instant" />
  <xsd:element abstract="true" id="cmcsa_TheatricalMember" name="TheatricalMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="cmcsa_ThemeParksMember" name="ThemeParksMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="cmcsa_TotalFilmAndTelevisionCostsAndProgrammingRightsAfterAmortization" name="TotalFilmAndTelevisionCostsAndProgrammingRightsAfterAmortization" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="instant" />
  <xsd:element abstract="true" id="cmcsa_UniversalBeijingResortMember" name="UniversalBeijingResortMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="cmcsa_UniversalStudiosJapanTermLoanMaturingMarch2022Member" name="UniversalStudiosJapanTermLoanMaturingMarch2022Member" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="cmcsa_UnsecuredBridgeCreditAgreementMaximumBorrowingCapacity" name="UnsecuredBridgeCreditAgreementMaximumBorrowingCapacity" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="instant" />
  <xsd:element id="cmcsa_UnsecuredTermLoanCreditAgreementMaximumBorrowingCapacity" name="UnsecuredTermLoanCreditAgreementMaximumBorrowingCapacity" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="instant" />
  <xsd:element id="cmcsa_VariableInterestEntityMaximumBorrowingCapacity" name="VariableInterestEntityMaximumBorrowingCapacity" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="instant" />
  <xsd:element abstract="true" id="cmcsa_WeatherChannelMember" name="WeatherChannelMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
</xsd:schema>