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  <xs:element id="rdn_TotalOf3Q191Q20And3Q21RepurchaseProgramsMember" abstract="true" name="TotalOf3Q191Q20And3Q21RepurchaseProgramsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
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  <xs:element id="rdn_ProceedsFromTheSalesOfInvestmentsAbstract" abstract="true" name="ProceedsFromTheSalesOfInvestmentsAbstract" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="rdn_AOCIAttributableToParentTaxRollForward" abstract="true" name="AOCIAttributableToParentTaxRollForward" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
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  <xs:element id="rdn_PrivateMortgageInsuranceProtectsLendersForRefinancingsMadeToHomeBuyersWithLessThanThisMaximumEquityOwnershipPercentage" abstract="false" name="PrivateMortgageInsuranceProtectsLendersForRefinancingsMadeToHomeBuyersWithLessThanThisMaximumEquityOwnershipPercentage" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="dtr-types1:percentItemType"/>
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  <xs:element id="rdn_PercentOfStockWithOrdinaryVotingRightsThatCompanyMustRetainInOrderToMakeAnyCapitalStockTransactions" abstract="false" name="PercentOfStockWithOrdinaryVotingRightsThatCompanyMustRetainInOrderToMakeAnyCapitalStockTransactions" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="dtr-types1:percentItemType"/>
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  <xs:element id="rdn_GoldmanSachsMasterRepurchaseAgreementMember" abstract="true" name="GoldmanSachsMasterRepurchaseAgreementMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="rdn_EquitySecuritiesChangeinUnrealizedHoldingGainLoss" abstract="false" name="EquitySecuritiesChangeinUnrealizedHoldingGainLoss" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
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  <xs:element id="rdn_NumberOfAnniversariesOfTheGrantDate" abstract="false" name="NumberOfAnniversariesOfTheGrantDate" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="xbrli:integerItemType"/>
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  <xs:element id="rdn_GainLossOnSaleOfMortgageLoansHedgingActivities" abstract="false" name="GainLossOnSaleOfMortgageLoansHedgingActivities" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
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  <xs:element id="rdn_ReinsuranceRetentionPolicyTermOfCoveragePeriod" abstract="false" name="ReinsuranceRetentionPolicyTermOfCoveragePeriod" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:durationItemType"/>
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  <xs:element id="rdn_BasisofPresentationandBusinessOverviewLineItems" abstract="true" name="BasisofPresentationandBusinessOverviewLineItems" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="rdn_RiskToCapitalRatioRegulatoryMaximum" abstract="false" name="RiskToCapitalRatioRegulatoryMaximum" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="xbrli:pureItemType"/>
  <xs:element id="rdn_MortgageInsuranceSegmentMember" abstract="true" name="MortgageInsuranceSegmentMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="rdn_AssetmanagementservicesMember" abstract="true" name="AssetmanagementservicesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="rdn_OtherComprehensiveIncomeLossReclassificationAdjustmentForNonCreditRelatedImpairmentsBeforeTax" abstract="false" name="OtherComprehensiveIncomeLossReclassificationAdjustmentForNonCreditRelatedImpairmentsBeforeTax" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="rdn_AvailableForSaleSecuritiesDebtSecuritiesIncludingLoanedSecurities" abstract="false" name="AvailableForSaleSecuritiesDebtSecuritiesIncludingLoanedSecurities" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="rdn_ShareBasedPaymentArrangementNetOfSharesWithheldForTaxWithholdingObligation" abstract="false" name="ShareBasedPaymentArrangementNetOfSharesWithheldForTaxWithholdingObligation" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:sharesItemType"/>
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  <xs:element id="rdn_IncreaseDecreaseInGoodwillAndIntangibleAssetsIncludingRestructuring" abstract="false" name="IncreaseDecreaseInGoodwillAndIntangibleAssetsIncludingRestructuring" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="rdn_SeniorNotesDue2024Member" abstract="true" name="SeniorNotesDue2024Member" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="rdn_OtherTechnologyServicesMember" abstract="true" name="OtherTechnologyServicesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
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  <xs:element id="rdn_PercentageChangeInNumberOfNewPrimaryDefaultNotices" abstract="false" name="PercentageChangeInNumberOfNewPrimaryDefaultNotices" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:percentItemType"/>
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  <xs:element id="rdn_RadianTitleInsuranceMember" abstract="true" name="RadianTitleInsuranceMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
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  <xs:element id="rdn_GainLossOnMortgageLoansHeldForSale" abstract="false" name="GainLossOnMortgageLoansHeldForSale" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
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  <xs:element id="rdn_MortgageInsuranceLinkedNotesMember" abstract="true" name="MortgageInsuranceLinkedNotesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="rdn_SingleFamilyRentalMember" abstract="true" name="SingleFamilyRentalMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="rdn_PrimaryCaseReservesMember" abstract="true" name="PrimaryCaseReservesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="rdn_UnrealizedGainsLossesOnInvestmentsAbstract" abstract="true" name="UnrealizedGainsLossesOnInvestmentsAbstract" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="rdn_ShareBasedCompensationArrangementByShareBasedPaymentAwardPerformanceAdjustmentToSharesWeightedAverageGrantDateFairValue" abstract="false" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardPerformanceAdjustmentToSharesWeightedAverageGrantDateFairValue" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:perShareItemType"/>
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  <xs:element id="rdn_DebtSecuritiesAvailableForSaleAccumulatedGrossUnrealizedGainBeforeTaxIncludingLoanedSecurities" abstract="false" name="DebtSecuritiesAvailableForSaleAccumulatedGrossUnrealizedGainBeforeTaxIncludingLoanedSecurities" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
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  <xs:element id="rdn_A2024QSRAgreementMember" abstract="true" name="A2024QSRAgreementMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="rdn_FirstLienPrimaryMortgageInsuranceRiskInForceCeded" abstract="false" name="FirstLienPrimaryMortgageInsuranceRiskInForceCeded" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
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  <xs:element id="rdn_UnearnedCedingCommissions" abstract="false" name="UnearnedCedingCommissions" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="rdn_DebtSecuritiesAvailableForSaleAccumulatedGrossUnrealizedLossBeforeTaxIncludingLoanedSecurities" abstract="false" name="DebtSecuritiesAvailableForSaleAccumulatedGrossUnrealizedLossBeforeTaxIncludingLoanedSecurities" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="rdn_GainLossOnInvestmentsAndFinancialInstruments" abstract="false" name="GainLossOnInvestmentsAndFinancialInstruments" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
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  <xs:element id="rdn_ChangeinUnrealizedHoldingGainLoss" abstract="false" name="ChangeinUnrealizedHoldingGainLoss" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
</xs:schema>
