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    <link:label id="lab_us-gaap_CostsAndExpenses_239F626284F4F14D33578D6A1A355F8B_totalLabel_en-US" xlink:label="lab_us-gaap_CostsAndExpenses_239F626284F4F14D33578D6A1A355F8B" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="en-US">Total expenses</link:label>
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    <link:label id="lab_rdn_NonAssetBackedSecurityInvestmentsContractualMaturitiesMember_6D0ED796FF752AD9C8792689EBF5B9CF_documentation_en-US" xlink:label="lab_rdn_NonAssetBackedSecurityInvestmentsContractualMaturitiesMember_6D0ED796FF752AD9C8792689EBF5B9CF" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Non Asset Backed Security Investments, Contractual Maturities is used to capture all fixed maturity investments excluding Asset Backed Securities (which have no single maturity dates) in the schedule of contractual maturities of fixed maturity investments. (excludes RMBS, CMBS and other ABS)</link:label>
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    <link:label id="lab_us-gaap_CommercialMortgageBackedSecuritiesMember_4F944E6BB4D960244A2C2689EBF5174A_terseLabel_en-US" xlink:label="lab_us-gaap_CommercialMortgageBackedSecuritiesMember_4F944E6BB4D960244A2C2689EBF5174A" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">CMBS</link:label>
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    <link:label id="lab_us-gaap_AssetBackedSecuritiesMember_C52D8C6541D66D5B10762689EBF5BB27_terseLabel_en-US" xlink:label="lab_us-gaap_AssetBackedSecuritiesMember_C52D8C6541D66D5B10762689EBF5BB27" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Other ABS</link:label>
    <link:label id="lab_us-gaap_AssetBackedSecuritiesMember_C52D8C6541D66D5B10762689EBF5BB27_label_en-US" xlink:label="lab_us-gaap_AssetBackedSecuritiesMember_C52D8C6541D66D5B10762689EBF5BB27" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Asset-backed Securities [Member]</link:label>
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    <link:label id="lab_us-gaap_DebtSecuritiesMember_C8626C9A1F832C17AC462689EBF5EDA6_label_en-US" xlink:label="lab_us-gaap_DebtSecuritiesMember_C8626C9A1F832C17AC462689EBF5EDA6" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Debt Securities [Member]</link:label>
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    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DebtSecuritiesMember_C8626C9A1F832C17AC462689EBF5EDA6" xlink:to="lab_us-gaap_DebtSecuritiesMember_C8626C9A1F832C17AC462689EBF5EDA6" xlink:type="arc" />
    <link:label id="lab_rdn_TotalDebtSecuritiesLineItems_02E669F17D349F4EB2E02689EBF5AFF3_terseLabel_en-US" xlink:label="lab_rdn_TotalDebtSecuritiesLineItems_02E669F17D349F4EB2E02689EBF5AFF3" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Total Debt Securities [Line Items]</link:label>
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    <link:label id="lab_rdn_TotalDebtSecuritiesLineItems_02E669F17D349F4EB2E02689EBF5AFF3_documentation_en-US" xlink:label="lab_rdn_TotalDebtSecuritiesLineItems_02E669F17D349F4EB2E02689EBF5AFF3" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Total Debt Securities [Line Items]</link:label>
    <link:loc xlink:href="rdn-20191231.xsd#rdn_TotalDebtSecuritiesLineItems" xlink:label="loc_rdn_TotalDebtSecuritiesLineItems_02E669F17D349F4EB2E02689EBF5AFF3" xlink:type="locator" />
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    <link:label id="lab_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesAbstract_E89B9EB9CA7B8038EB812689EBF5308A_terseLabel_en-US" xlink:label="lab_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesAbstract_E89B9EB9CA7B8038EB812689EBF5308A" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Available-for-sale Securities</link:label>
    <link:label id="lab_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesAbstract_E89B9EB9CA7B8038EB812689EBF5308A_label_en-US" xlink:label="lab_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesAbstract_E89B9EB9CA7B8038EB812689EBF5308A" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Available-for-sale Securities, Debt Maturities [Abstract]</link:label>
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    <link:label id="lab_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesAmortizedCostAbstract_26789B50061305363C612689EBF6815D_label_en-US" xlink:label="lab_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesAmortizedCostAbstract_26789B50061305363C612689EBF6815D" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Debt Securities, Available-for-sale, Amortized Cost, Fiscal Year Maturity [Abstract]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_AvailableForSaleSecuritiesDebtMaturitiesAmortizedCostAbstract" xlink:label="loc_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesAmortizedCostAbstract_26789B50061305363C612689EBF6815D" xlink:type="locator" />
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    <link:label id="lab_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesAfterOneThroughFiveYearsAmortizedCost_DE82F65E3E7601585B6D2689EBF6A322_label_en-US" xlink:label="lab_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesAfterOneThroughFiveYearsAmortizedCost_DE82F65E3E7601585B6D2689EBF6A322" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, after One Through Five Years, Amortized Cost</link:label>
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    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesAfterOneThroughFiveYearsAmortizedCost_DE82F65E3E7601585B6D2689EBF6A322" xlink:to="lab_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesAfterOneThroughFiveYearsAmortizedCost_DE82F65E3E7601585B6D2689EBF6A322" xlink:type="arc" />
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    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_AvailableForSaleSecuritiesDebtMaturitiesAfterTenYearsAmortizedCost" xlink:label="loc_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesAfterTenYearsAmortizedCost_8CD04E18B2312E4EBB032689EBF7C6B9" xlink:type="locator" />
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    <link:label id="lab_rdn_FirstLienMortgageInsuranceProductsMember_F533B761AC232559D45A269DF5C6D4A9_terseLabel_en-US" xlink:label="lab_rdn_FirstLienMortgageInsuranceProductsMember_F533B761AC232559D45A269DF5C6D4A9" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Prime Mortgage Insurance Product</link:label>
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    <link:label id="lab_rdn_MortgageInsuranceSegmentMember_2E75ECCA1C487F9F1D77269DF5C608BB_verboseLabel_en-US" xlink:label="lab_rdn_MortgageInsuranceSegmentMember_2E75ECCA1C487F9F1D77269DF5C608BB" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Mortgage insurance loss reserves</link:label>
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    <link:label id="lab_rdn_MortgageandRealEstateServicesSegmentMember_C3DD1039577067483CC5269DF5C7D310_verboseLabel_en-US" xlink:label="lab_rdn_MortgageandRealEstateServicesSegmentMember_C3DD1039577067483CC5269DF5C7D310" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Services loss reserves</link:label>
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    <link:label id="lab_rdn_LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseActivityInLiabilityAxis_62BB995227F57F1EF3D56EC8883F9323_terseLabel_en-US" xlink:label="lab_rdn_LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseActivityInLiabilityAxis_62BB995227F57F1EF3D56EC8883F9323" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Liability for Unpaid Claims And Claims Adjustment Expense Activity In Liability [Axis]</link:label>
    <link:label id="lab_rdn_LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseActivityInLiabilityAxis_62BB995227F57F1EF3D56EC8883F9323_label_en-US" xlink:label="lab_rdn_LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseActivityInLiabilityAxis_62BB995227F57F1EF3D56EC8883F9323" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Liability for Unpaid Claims And Claims Adjustment Expense Activity In Liability [Axis]</link:label>
    <link:label id="lab_rdn_LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseActivityInLiabilityAxis_62BB995227F57F1EF3D56EC8883F9323_documentation_en-US" xlink:label="lab_rdn_LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseActivityInLiabilityAxis_62BB995227F57F1EF3D56EC8883F9323" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Liability for Unpaid Claims And Claims Adjustment Expense Activity In Liability [Axis]</link:label>
    <link:loc xlink:href="rdn-20191231.xsd#rdn_LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseActivityInLiabilityAxis" xlink:label="loc_rdn_LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseActivityInLiabilityAxis_62BB995227F57F1EF3D56EC8883F9323" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_rdn_LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseActivityInLiabilityAxis_62BB995227F57F1EF3D56EC8883F9323" xlink:to="lab_rdn_LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseActivityInLiabilityAxis_62BB995227F57F1EF3D56EC8883F9323" xlink:type="arc" />
    <link:label id="lab_rdn_LiabilityForClaimsAndClaimsAdjustmentExpenseActivityDomain_B142A8AE228F1512B2D96EC8883F6103_terseLabel_en-US" xlink:label="lab_rdn_LiabilityForClaimsAndClaimsAdjustmentExpenseActivityDomain_B142A8AE228F1512B2D96EC8883F6103" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Liability For Claims And Claims Adjustment Expense Activity [Domain]</link:label>
    <link:label id="lab_rdn_LiabilityForClaimsAndClaimsAdjustmentExpenseActivityDomain_B142A8AE228F1512B2D96EC8883F6103_label_en-US" xlink:label="lab_rdn_LiabilityForClaimsAndClaimsAdjustmentExpenseActivityDomain_B142A8AE228F1512B2D96EC8883F6103" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Liability For Claims And Claims Adjustment Expense Activity [Domain]</link:label>
    <link:label id="lab_rdn_LiabilityForClaimsAndClaimsAdjustmentExpenseActivityDomain_B142A8AE228F1512B2D96EC8883F6103_documentation_en-US" xlink:label="lab_rdn_LiabilityForClaimsAndClaimsAdjustmentExpenseActivityDomain_B142A8AE228F1512B2D96EC8883F6103" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Liability For Claims And Claims Adjustment Expense Activity [Domain]</link:label>
    <link:loc xlink:href="rdn-20191231.xsd#rdn_LiabilityForClaimsAndClaimsAdjustmentExpenseActivityDomain" xlink:label="loc_rdn_LiabilityForClaimsAndClaimsAdjustmentExpenseActivityDomain_B142A8AE228F1512B2D96EC8883F6103" xlink:type="locator" />
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    <link:label id="lab_rdn_IncurredButNotReportedMember_7ED5D46B34AA81B9A8A16EC88840AF79_terseLabel_en-US" xlink:label="lab_rdn_IncurredButNotReportedMember_7ED5D46B34AA81B9A8A16EC88840AF79" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Incurred But Not Reported</link:label>
    <link:label id="lab_rdn_IncurredButNotReportedMember_7ED5D46B34AA81B9A8A16EC88840AF79_label_en-US" xlink:label="lab_rdn_IncurredButNotReportedMember_7ED5D46B34AA81B9A8A16EC88840AF79" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Incurred But Not Reported [Member]</link:label>
    <link:label id="lab_rdn_IncurredButNotReportedMember_7ED5D46B34AA81B9A8A16EC88840AF79_documentation_en-US" xlink:label="lab_rdn_IncurredButNotReportedMember_7ED5D46B34AA81B9A8A16EC88840AF79" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Incurred But Not Reported [Member]</link:label>
    <link:loc xlink:href="rdn-20191231.xsd#rdn_IncurredButNotReportedMember" xlink:label="loc_rdn_IncurredButNotReportedMember_7ED5D46B34AA81B9A8A16EC88840AF79" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_rdn_IncurredButNotReportedMember_7ED5D46B34AA81B9A8A16EC88840AF79" xlink:to="lab_rdn_IncurredButNotReportedMember_7ED5D46B34AA81B9A8A16EC88840AF79" xlink:type="arc" />
    <link:label id="lab_rdn_DefaulttoClaimRateDefaultsNotinForeclosureStageAgeAxis_7923F46B7E61DAEC1AFD6EC888400DF7_terseLabel_en-US" xlink:label="lab_rdn_DefaulttoClaimRateDefaultsNotinForeclosureStageAgeAxis_7923F46B7E61DAEC1AFD6EC888400DF7" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Default to Claim Rate, Defaults Not in Foreclosure Stage, Age [Axis]</link:label>
    <link:label id="lab_rdn_DefaulttoClaimRateDefaultsNotinForeclosureStageAgeAxis_7923F46B7E61DAEC1AFD6EC888400DF7_label_en-US" xlink:label="lab_rdn_DefaulttoClaimRateDefaultsNotinForeclosureStageAgeAxis_7923F46B7E61DAEC1AFD6EC888400DF7" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Default to Claim Rate, Defaults Not in Foreclosure Stage, Age [Axis]</link:label>
    <link:label id="lab_rdn_DefaulttoClaimRateDefaultsNotinForeclosureStageAgeAxis_7923F46B7E61DAEC1AFD6EC888400DF7_documentation_en-US" xlink:label="lab_rdn_DefaulttoClaimRateDefaultsNotinForeclosureStageAgeAxis_7923F46B7E61DAEC1AFD6EC888400DF7" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Default to Claim Rate, Defaults Not in Foreclosure Stage, Age [Axis]</link:label>
    <link:loc xlink:href="rdn-20191231.xsd#rdn_DefaulttoClaimRateDefaultsNotinForeclosureStageAgeAxis" xlink:label="loc_rdn_DefaulttoClaimRateDefaultsNotinForeclosureStageAgeAxis_7923F46B7E61DAEC1AFD6EC888400DF7" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_rdn_DefaulttoClaimRateDefaultsNotinForeclosureStageAgeAxis_7923F46B7E61DAEC1AFD6EC888400DF7" xlink:to="lab_rdn_DefaulttoClaimRateDefaultsNotinForeclosureStageAgeAxis_7923F46B7E61DAEC1AFD6EC888400DF7" xlink:type="arc" />
    <link:label id="lab_rdn_DefaulttoClaimRateDefaultsNotinForeclosureStageAgeDomain_B629665AAC046A3383686EC88840562F_terseLabel_en-US" xlink:label="lab_rdn_DefaulttoClaimRateDefaultsNotinForeclosureStageAgeDomain_B629665AAC046A3383686EC88840562F" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Default to Claim Rate, Defaults Not in Foreclosure Stage, Age [Domain]</link:label>
    <link:label id="lab_rdn_DefaulttoClaimRateDefaultsNotinForeclosureStageAgeDomain_B629665AAC046A3383686EC88840562F_label_en-US" xlink:label="lab_rdn_DefaulttoClaimRateDefaultsNotinForeclosureStageAgeDomain_B629665AAC046A3383686EC88840562F" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Default to Claim Rate, Defaults Not in Foreclosure Stage, Age [Domain]</link:label>
    <link:label id="lab_rdn_DefaulttoClaimRateDefaultsNotinForeclosureStageAgeDomain_B629665AAC046A3383686EC88840562F_documentation_en-US" xlink:label="lab_rdn_DefaulttoClaimRateDefaultsNotinForeclosureStageAgeDomain_B629665AAC046A3383686EC88840562F" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">[Domain] for Default to Claim Rate, Defaults Not in Foreclosure Stage, Age [Axis]</link:label>
    <link:loc xlink:href="rdn-20191231.xsd#rdn_DefaulttoClaimRateDefaultsNotinForeclosureStageAgeDomain" xlink:label="loc_rdn_DefaulttoClaimRateDefaultsNotinForeclosureStageAgeDomain_B629665AAC046A3383686EC88840562F" xlink:type="locator" />
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    <link:label id="lab_rdn_AgedLessThanorEqualto5YearsMember_7B54AEC9D545D9D5237C6F156C6F9A1E_terseLabel_en-US" xlink:label="lab_rdn_AgedLessThanorEqualto5YearsMember_7B54AEC9D545D9D5237C6F156C6F9A1E" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Aged less than or equal to 5 years</link:label>
    <link:label id="lab_rdn_AgedLessThanorEqualto5YearsMember_7B54AEC9D545D9D5237C6F156C6F9A1E_label_en-US" xlink:label="lab_rdn_AgedLessThanorEqualto5YearsMember_7B54AEC9D545D9D5237C6F156C6F9A1E" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Aged Less Than or Equal to 5 Years [Member]</link:label>
    <link:label id="lab_rdn_AgedLessThanorEqualto5YearsMember_7B54AEC9D545D9D5237C6F156C6F9A1E_documentation_en-US" xlink:label="lab_rdn_AgedLessThanorEqualto5YearsMember_7B54AEC9D545D9D5237C6F156C6F9A1E" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Aged Less Than or Equal to 5 Years [Member]</link:label>
    <link:loc xlink:href="rdn-20191231.xsd#rdn_AgedLessThanorEqualto5YearsMember" xlink:label="loc_rdn_AgedLessThanorEqualto5YearsMember_7B54AEC9D545D9D5237C6F156C6F9A1E" xlink:type="locator" />
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    <link:label id="lab_rdn_AgedGreaterThan5YearsMember_3AB7AF71F637A1BB32706EC88841409D_terseLabel_en-US" xlink:label="lab_rdn_AgedGreaterThan5YearsMember_3AB7AF71F637A1BB32706EC88841409D" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Aged greater than 5 Years</link:label>
    <link:label id="lab_rdn_AgedGreaterThan5YearsMember_3AB7AF71F637A1BB32706EC88841409D_label_en-US" xlink:label="lab_rdn_AgedGreaterThan5YearsMember_3AB7AF71F637A1BB32706EC88841409D" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Aged Greater Than 5 Years [Member]</link:label>
    <link:label id="lab_rdn_AgedGreaterThan5YearsMember_3AB7AF71F637A1BB32706EC88841409D_documentation_en-US" xlink:label="lab_rdn_AgedGreaterThan5YearsMember_3AB7AF71F637A1BB32706EC88841409D" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Aged Greater Than 5 Years [Member]</link:label>
    <link:loc xlink:href="rdn-20191231.xsd#rdn_AgedGreaterThan5YearsMember" xlink:label="loc_rdn_AgedGreaterThan5YearsMember_3AB7AF71F637A1BB32706EC88841409D" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_rdn_AgedGreaterThan5YearsMember_3AB7AF71F637A1BB32706EC88841409D" xlink:to="lab_rdn_AgedGreaterThan5YearsMember_3AB7AF71F637A1BB32706EC88841409D" xlink:type="arc" />
    <link:label id="lab_rdn_AgedLessThanorEqualto5YearsMoredAgedMember_3086BCBEFAAB96CA333F6F14289695C9_terseLabel_en-US" xlink:label="lab_rdn_AgedLessThanorEqualto5YearsMoredAgedMember_3086BCBEFAAB96CA333F6F14289695C9" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Aged less than or equal to 5 Years - more aged</link:label>
    <link:label id="lab_rdn_AgedLessThanorEqualto5YearsMoredAgedMember_3086BCBEFAAB96CA333F6F14289695C9_label_en-US" xlink:label="lab_rdn_AgedLessThanorEqualto5YearsMoredAgedMember_3086BCBEFAAB96CA333F6F14289695C9" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Aged Less Than or Equal to 5 Years - Mored Aged [Member]</link:label>
    <link:label id="lab_rdn_AgedLessThanorEqualto5YearsMoredAgedMember_3086BCBEFAAB96CA333F6F14289695C9_documentation_en-US" xlink:label="lab_rdn_AgedLessThanorEqualto5YearsMoredAgedMember_3086BCBEFAAB96CA333F6F14289695C9" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Aged Less Than or Equal to 5 Years - Mored Aged [Member]</link:label>
    <link:loc xlink:href="rdn-20191231.xsd#rdn_AgedLessThanorEqualto5YearsMoredAgedMember" xlink:label="loc_rdn_AgedLessThanorEqualto5YearsMoredAgedMember_3086BCBEFAAB96CA333F6F14289695C9" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_rdn_AgedLessThanorEqualto5YearsMoredAgedMember_3086BCBEFAAB96CA333F6F14289695C9" xlink:to="lab_rdn_AgedLessThanorEqualto5YearsMoredAgedMember_3086BCBEFAAB96CA333F6F14289695C9" xlink:type="arc" />
    <link:label id="lab_rdn_HurricanesHarveyandIrmaMember_698426890F5994D238E06EC8884142FA_terseLabel_en-US" xlink:label="lab_rdn_HurricanesHarveyandIrmaMember_698426890F5994D238E06EC8884142FA" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Hurricanes Harvey and Irma</link:label>
    <link:label id="lab_rdn_HurricanesHarveyandIrmaMember_698426890F5994D238E06EC8884142FA_label_en-US" xlink:label="lab_rdn_HurricanesHarveyandIrmaMember_698426890F5994D238E06EC8884142FA" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Hurricanes Harvey and Irma [Member]</link:label>
    <link:label id="lab_rdn_HurricanesHarveyandIrmaMember_698426890F5994D238E06EC8884142FA_documentation_en-US" xlink:label="lab_rdn_HurricanesHarveyandIrmaMember_698426890F5994D238E06EC8884142FA" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Hurricanes Harvey and Irma [Member]</link:label>
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    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_rdn_HurricanesHarveyandIrmaMember_698426890F5994D238E06EC8884142FA" xlink:to="lab_rdn_HurricanesHarveyandIrmaMember_698426890F5994D238E06EC8884142FA" xlink:type="arc" />
    <link:label id="lab_us-gaap_LiabilityForFuturePolicyBenefitsOtherIncreaseDecrease_E234505B10EE255165E56EC88842D669_verboseLabel_en-US" xlink:label="lab_us-gaap_LiabilityForFuturePolicyBenefitsOtherIncreaseDecrease_E234505B10EE255165E56EC88842D669" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Liability for Future Policy Benefits, Other Increase (Decrease)</link:label>
    <link:label id="lab_us-gaap_LiabilityForFuturePolicyBenefitsOtherIncreaseDecrease_E234505B10EE255165E56EC88842D669_label_en-US" xlink:label="lab_us-gaap_LiabilityForFuturePolicyBenefitsOtherIncreaseDecrease_E234505B10EE255165E56EC88842D669" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Liability for Future Policy Benefits, Other Increase (Decrease)</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_LiabilityForFuturePolicyBenefitsOtherIncreaseDecrease" xlink:label="loc_us-gaap_LiabilityForFuturePolicyBenefitsOtherIncreaseDecrease_E234505B10EE255165E56EC88842D669" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_LiabilityForFuturePolicyBenefitsOtherIncreaseDecrease_E234505B10EE255165E56EC88842D669" xlink:to="lab_us-gaap_LiabilityForFuturePolicyBenefitsOtherIncreaseDecrease_E234505B10EE255165E56EC88842D669" xlink:type="arc" />
    <link:label id="lab_rdn_DefaultToClaimRateEstimateGrossForNewDefaults_BE3B42DE70579ED8BD396EC888423DA5_terseLabel_en-US" xlink:label="lab_rdn_DefaultToClaimRateEstimateGrossForNewDefaults_BE3B42DE70579ED8BD396EC888423DA5" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Default To Claim Rate Estimate, Gross, For New Defaults</link:label>
    <link:label id="lab_rdn_DefaultToClaimRateEstimateGrossForNewDefaults_BE3B42DE70579ED8BD396EC888423DA5_label_en-US" xlink:label="lab_rdn_DefaultToClaimRateEstimateGrossForNewDefaults_BE3B42DE70579ED8BD396EC888423DA5" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Default To Claim Rate Estimate, Gross, For New Defaults</link:label>
    <link:label id="lab_rdn_DefaultToClaimRateEstimateGrossForNewDefaults_BE3B42DE70579ED8BD396EC888423DA5_documentation_en-US" xlink:label="lab_rdn_DefaultToClaimRateEstimateGrossForNewDefaults_BE3B42DE70579ED8BD396EC888423DA5" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">This concept represents the rate at which newly reported defaulted loans are expected to result in a claim.</link:label>
    <link:loc xlink:href="rdn-20191231.xsd#rdn_DefaultToClaimRateEstimateGrossForNewDefaults" xlink:label="loc_rdn_DefaultToClaimRateEstimateGrossForNewDefaults_BE3B42DE70579ED8BD396EC888423DA5" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_rdn_DefaultToClaimRateEstimateGrossForNewDefaults_BE3B42DE70579ED8BD396EC888423DA5" xlink:to="lab_rdn_DefaultToClaimRateEstimateGrossForNewDefaults_BE3B42DE70579ED8BD396EC888423DA5" xlink:type="arc" />
    <link:label id="lab_rdn_DefaultToClaimRateEstimateGrossForPreForeclosureStageDefaults_2C6F8469DA2B3FE228786EC888423BF3_terseLabel_en-US" xlink:label="lab_rdn_DefaultToClaimRateEstimateGrossForPreForeclosureStageDefaults_2C6F8469DA2B3FE228786EC888423BF3" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Default To Claim Rate Estimate, Gross, For Pre-Foreclosure Stage Defaults</link:label>
    <link:label id="lab_rdn_DefaultToClaimRateEstimateGrossForPreForeclosureStageDefaults_2C6F8469DA2B3FE228786EC888423BF3_label_en-US" xlink:label="lab_rdn_DefaultToClaimRateEstimateGrossForPreForeclosureStageDefaults_2C6F8469DA2B3FE228786EC888423BF3" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Default To Claim Rate Estimate, Gross, For Pre-Foreclosure Stage Defaults</link:label>
    <link:label id="lab_rdn_DefaultToClaimRateEstimateGrossForPreForeclosureStageDefaults_2C6F8469DA2B3FE228786EC888423BF3_documentation_en-US" xlink:label="lab_rdn_DefaultToClaimRateEstimateGrossForPreForeclosureStageDefaults_2C6F8469DA2B3FE228786EC888423BF3" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">This concept represents the rate at which defaulted loans that have not yet reached the foreclosure stage are expected to result in a claim.</link:label>
    <link:loc xlink:href="rdn-20191231.xsd#rdn_DefaultToClaimRateEstimateGrossForPreForeclosureStageDefaults" xlink:label="loc_rdn_DefaultToClaimRateEstimateGrossForPreForeclosureStageDefaults_2C6F8469DA2B3FE228786EC888423BF3" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_rdn_DefaultToClaimRateEstimateGrossForPreForeclosureStageDefaults_2C6F8469DA2B3FE228786EC888423BF3" xlink:to="lab_rdn_DefaultToClaimRateEstimateGrossForPreForeclosureStageDefaults_2C6F8469DA2B3FE228786EC888423BF3" xlink:type="arc" />
    <link:label id="lab_rdn_DefaultToClaimEstimateGrossForForeclosureStageDefaults_3950B0D7372470AE83016EC888423122_terseLabel_en-US" xlink:label="lab_rdn_DefaultToClaimEstimateGrossForForeclosureStageDefaults_3950B0D7372470AE83016EC888423122" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Default To Claim Estimate, Gross, For Foreclosure Stage Defaults</link:label>
    <link:label id="lab_rdn_DefaultToClaimEstimateGrossForForeclosureStageDefaults_3950B0D7372470AE83016EC888423122_label_en-US" xlink:label="lab_rdn_DefaultToClaimEstimateGrossForForeclosureStageDefaults_3950B0D7372470AE83016EC888423122" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Default To Claim Estimate, Gross, For Foreclosure Stage Defaults</link:label>
    <link:label id="lab_rdn_DefaultToClaimEstimateGrossForForeclosureStageDefaults_3950B0D7372470AE83016EC888423122_documentation_en-US" xlink:label="lab_rdn_DefaultToClaimEstimateGrossForForeclosureStageDefaults_3950B0D7372470AE83016EC888423122" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">This concept represents the rate at which defaulted loans that have reached the stage where the foreclosure sale has been scheduled or held are expected to result in a claim.</link:label>
    <link:loc xlink:href="rdn-20191231.xsd#rdn_DefaultToClaimEstimateGrossForForeclosureStageDefaults" xlink:label="loc_rdn_DefaultToClaimEstimateGrossForForeclosureStageDefaults_3950B0D7372470AE83016EC888423122" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_rdn_DefaultToClaimEstimateGrossForForeclosureStageDefaults_3950B0D7372470AE83016EC888423122" xlink:to="lab_rdn_DefaultToClaimEstimateGrossForForeclosureStageDefaults_3950B0D7372470AE83016EC888423122" xlink:type="arc" />
    <link:label id="lab_rdn_NumberofNaturalDisasters_FBA7635650C486122CAA6EC888426DE4_terseLabel_en-US" xlink:label="lab_rdn_NumberofNaturalDisasters_FBA7635650C486122CAA6EC888426DE4" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Number of Natural Disasters</link:label>
    <link:label id="lab_rdn_NumberofNaturalDisasters_FBA7635650C486122CAA6EC888426DE4_label_en-US" xlink:label="lab_rdn_NumberofNaturalDisasters_FBA7635650C486122CAA6EC888426DE4" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Number of Natural Disasters</link:label>
    <link:label id="lab_rdn_NumberofNaturalDisasters_FBA7635650C486122CAA6EC888426DE4_documentation_en-US" xlink:label="lab_rdn_NumberofNaturalDisasters_FBA7635650C486122CAA6EC888426DE4" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Number of natural disasters</link:label>
    <link:loc xlink:href="rdn-20191231.xsd#rdn_NumberofNaturalDisasters" xlink:label="loc_rdn_NumberofNaturalDisasters_FBA7635650C486122CAA6EC888426DE4" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_rdn_NumberofNaturalDisasters_FBA7635650C486122CAA6EC888426DE4" xlink:to="lab_rdn_NumberofNaturalDisasters_FBA7635650C486122CAA6EC888426DE4" xlink:type="arc" />
    <link:label id="lab_us-gaap_EquityAbstract_947130D42A12BDF9863D88C6265FB097_label_en-US" xlink:label="lab_us-gaap_EquityAbstract_947130D42A12BDF9863D88C6265FB097" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Equity [Abstract]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_EquityAbstract" xlink:label="loc_us-gaap_EquityAbstract_947130D42A12BDF9863D88C6265FB097" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_EquityAbstract_947130D42A12BDF9863D88C6265FB097" xlink:to="lab_us-gaap_EquityAbstract_947130D42A12BDF9863D88C6265FB097" xlink:type="arc" />
    <link:label id="lab_us-gaap_ScheduleOfStockByClassTable_D62FD1942C708271591688C6265F2D32_terseLabel_en-US" xlink:label="lab_us-gaap_ScheduleOfStockByClassTable_D62FD1942C708271591688C6265F2D32" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Schedule of Stock by Class [Table]</link:label>
    <link:label id="lab_us-gaap_ScheduleOfStockByClassTable_D62FD1942C708271591688C6265F2D32_label_en-US" xlink:label="lab_us-gaap_ScheduleOfStockByClassTable_D62FD1942C708271591688C6265F2D32" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Schedule of Stock by Class [Table]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ScheduleOfStockByClassTable" xlink:label="loc_us-gaap_ScheduleOfStockByClassTable_D62FD1942C708271591688C6265F2D32" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ScheduleOfStockByClassTable_D62FD1942C708271591688C6265F2D32" xlink:to="lab_us-gaap_ScheduleOfStockByClassTable_D62FD1942C708271591688C6265F2D32" xlink:type="arc" />
    <link:label id="lab_us-gaap_ShareRepurchaseProgramAxis_F7DBE15EE2242731D2FC88C626609DE0_terseLabel_en-US" xlink:label="lab_us-gaap_ShareRepurchaseProgramAxis_F7DBE15EE2242731D2FC88C626609DE0" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Share Repurchase Program [Axis]</link:label>
    <link:label id="lab_us-gaap_ShareRepurchaseProgramAxis_F7DBE15EE2242731D2FC88C626609DE0_label_en-US" xlink:label="lab_us-gaap_ShareRepurchaseProgramAxis_F7DBE15EE2242731D2FC88C626609DE0" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Share Repurchase Program [Axis]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ShareRepurchaseProgramAxis" xlink:label="loc_us-gaap_ShareRepurchaseProgramAxis_F7DBE15EE2242731D2FC88C626609DE0" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ShareRepurchaseProgramAxis_F7DBE15EE2242731D2FC88C626609DE0" xlink:to="lab_us-gaap_ShareRepurchaseProgramAxis_F7DBE15EE2242731D2FC88C626609DE0" xlink:type="arc" />
    <link:label id="lab_us-gaap_ShareRepurchaseProgramDomain_54117DA02C53606123D288C6266020D0_terseLabel_en-US" xlink:label="lab_us-gaap_ShareRepurchaseProgramDomain_54117DA02C53606123D288C6266020D0" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Share Repurchase Program [Domain]</link:label>
    <link:label id="lab_us-gaap_ShareRepurchaseProgramDomain_54117DA02C53606123D288C6266020D0_label_en-US" xlink:label="lab_us-gaap_ShareRepurchaseProgramDomain_54117DA02C53606123D288C6266020D0" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Share Repurchase Program [Domain]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ShareRepurchaseProgramDomain" xlink:label="loc_us-gaap_ShareRepurchaseProgramDomain_54117DA02C53606123D288C6266020D0" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ShareRepurchaseProgramDomain_54117DA02C53606123D288C6266020D0" xlink:to="lab_us-gaap_ShareRepurchaseProgramDomain_54117DA02C53606123D288C6266020D0" xlink:type="arc" />
    <link:label id="lab_rdn_A3Q18RepurchaseProgramMember_B0983552DD2A6349D87E88C626602FF1_terseLabel_en-US" xlink:label="lab_rdn_A3Q18RepurchaseProgramMember_B0983552DD2A6349D87E88C626602FF1" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">3Q18 Repurchase Program</link:label>
    <link:label id="lab_rdn_A3Q18RepurchaseProgramMember_B0983552DD2A6349D87E88C626602FF1_label_en-US" xlink:label="lab_rdn_A3Q18RepurchaseProgramMember_B0983552DD2A6349D87E88C626602FF1" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">3Q18 Repurchase Program [Member]</link:label>
    <link:label id="lab_rdn_A3Q18RepurchaseProgramMember_B0983552DD2A6349D87E88C626602FF1_documentation_en-US" xlink:label="lab_rdn_A3Q18RepurchaseProgramMember_B0983552DD2A6349D87E88C626602FF1" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">3Q18 Repurchase Program</link:label>
    <link:loc xlink:href="rdn-20191231.xsd#rdn_A3Q18RepurchaseProgramMember" xlink:label="loc_rdn_A3Q18RepurchaseProgramMember_B0983552DD2A6349D87E88C626602FF1" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_rdn_A3Q18RepurchaseProgramMember_B0983552DD2A6349D87E88C626602FF1" xlink:to="lab_rdn_A3Q18RepurchaseProgramMember_B0983552DD2A6349D87E88C626602FF1" xlink:type="arc" />
    <link:label id="lab_rdn_A1Q19RepurchaseProgramMember_D1193D54BEB74604939588C62661BAA1_terseLabel_en-US" xlink:label="lab_rdn_A1Q19RepurchaseProgramMember_D1193D54BEB74604939588C62661BAA1" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">1Q19 Repurchase Program</link:label>
    <link:label id="lab_rdn_A1Q19RepurchaseProgramMember_D1193D54BEB74604939588C62661BAA1_label_en-US" xlink:label="lab_rdn_A1Q19RepurchaseProgramMember_D1193D54BEB74604939588C62661BAA1" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">1Q19 Repurchase Program [Member]</link:label>
    <link:label id="lab_rdn_A1Q19RepurchaseProgramMember_D1193D54BEB74604939588C62661BAA1_documentation_en-US" xlink:label="lab_rdn_A1Q19RepurchaseProgramMember_D1193D54BEB74604939588C62661BAA1" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">1Q19 Repurchase Program [Member]</link:label>
    <link:loc xlink:href="rdn-20191231.xsd#rdn_A1Q19RepurchaseProgramMember" xlink:label="loc_rdn_A1Q19RepurchaseProgramMember_D1193D54BEB74604939588C62661BAA1" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_rdn_A1Q19RepurchaseProgramMember_D1193D54BEB74604939588C62661BAA1" xlink:to="lab_rdn_A1Q19RepurchaseProgramMember_D1193D54BEB74604939588C62661BAA1" xlink:type="arc" />
    <link:label id="lab_rdn_Totalof3Q18and1Q19RepurchaseProgramsMember_C04B604AB81191B3F70B88C6266129AB_terseLabel_en-US" xlink:label="lab_rdn_Totalof3Q18and1Q19RepurchaseProgramsMember_C04B604AB81191B3F70B88C6266129AB" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Total of 3Q18 and 1Q19 Repurchase Programs</link:label>
    <link:label id="lab_rdn_Totalof3Q18and1Q19RepurchaseProgramsMember_C04B604AB81191B3F70B88C6266129AB_label_en-US" xlink:label="lab_rdn_Totalof3Q18and1Q19RepurchaseProgramsMember_C04B604AB81191B3F70B88C6266129AB" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Total of 3Q18 and 1Q19 Repurchase Programs [Member]</link:label>
    <link:label id="lab_rdn_Totalof3Q18and1Q19RepurchaseProgramsMember_C04B604AB81191B3F70B88C6266129AB_documentation_en-US" xlink:label="lab_rdn_Totalof3Q18and1Q19RepurchaseProgramsMember_C04B604AB81191B3F70B88C6266129AB" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Total of 3Q18 and 1Q19 Repurchase Programs [Member]</link:label>
    <link:loc xlink:href="rdn-20191231.xsd#rdn_Totalof3Q18and1Q19RepurchaseProgramsMember" xlink:label="loc_rdn_Totalof3Q18and1Q19RepurchaseProgramsMember_C04B604AB81191B3F70B88C6266129AB" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_rdn_Totalof3Q18and1Q19RepurchaseProgramsMember_C04B604AB81191B3F70B88C6266129AB" xlink:to="lab_rdn_Totalof3Q18and1Q19RepurchaseProgramsMember_C04B604AB81191B3F70B88C6266129AB" xlink:type="arc" />
    <link:label id="lab_rdn_A3Q19RepurchaseProgramMember_23CBDF0F2EF84DE220EC88C626610B58_terseLabel_en-US" xlink:label="lab_rdn_A3Q19RepurchaseProgramMember_23CBDF0F2EF84DE220EC88C626610B58" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">3Q19 Repurchase Program</link:label>
    <link:label id="lab_rdn_A3Q19RepurchaseProgramMember_23CBDF0F2EF84DE220EC88C626610B58_label_en-US" xlink:label="lab_rdn_A3Q19RepurchaseProgramMember_23CBDF0F2EF84DE220EC88C626610B58" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">3Q19 Repurchase Program [Member]</link:label>
    <link:label id="lab_rdn_A3Q19RepurchaseProgramMember_23CBDF0F2EF84DE220EC88C626610B58_documentation_en-US" xlink:label="lab_rdn_A3Q19RepurchaseProgramMember_23CBDF0F2EF84DE220EC88C626610B58" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">3Q19 Repurchase Program [Member]</link:label>
    <link:loc xlink:href="rdn-20191231.xsd#rdn_A3Q19RepurchaseProgramMember" xlink:label="loc_rdn_A3Q19RepurchaseProgramMember_23CBDF0F2EF84DE220EC88C626610B58" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_rdn_A3Q19RepurchaseProgramMember_23CBDF0F2EF84DE220EC88C626610B58" xlink:to="lab_rdn_A3Q19RepurchaseProgramMember_23CBDF0F2EF84DE220EC88C626610B58" xlink:type="arc" />
    <link:label id="lab_rdn_A1Q20RepurchaseProgramMember_EDD682B698CC4A72EBEE88C626613B7E_terseLabel_en-US" xlink:label="lab_rdn_A1Q20RepurchaseProgramMember_EDD682B698CC4A72EBEE88C626613B7E" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">1Q20 Repurchase Program</link:label>
    <link:label id="lab_rdn_A1Q20RepurchaseProgramMember_EDD682B698CC4A72EBEE88C626613B7E_label_en-US" xlink:label="lab_rdn_A1Q20RepurchaseProgramMember_EDD682B698CC4A72EBEE88C626613B7E" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">1Q20 Repurchase Program [Member]</link:label>
    <link:label id="lab_rdn_A1Q20RepurchaseProgramMember_EDD682B698CC4A72EBEE88C626613B7E_documentation_en-US" xlink:label="lab_rdn_A1Q20RepurchaseProgramMember_EDD682B698CC4A72EBEE88C626613B7E" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">1Q20 Repurchase Program [Member]</link:label>
    <link:loc xlink:href="rdn-20191231.xsd#rdn_A1Q20RepurchaseProgramMember" xlink:label="loc_rdn_A1Q20RepurchaseProgramMember_EDD682B698CC4A72EBEE88C626613B7E" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_rdn_A1Q20RepurchaseProgramMember_EDD682B698CC4A72EBEE88C626613B7E" xlink:to="lab_rdn_A1Q20RepurchaseProgramMember_EDD682B698CC4A72EBEE88C626613B7E" xlink:type="arc" />
    <link:label id="lab_rdn_Totalof3Q19and1Q20RepurchaseProgramsMember_0110236FB3DA02AD1CD988C62661324D_terseLabel_en-US" xlink:label="lab_rdn_Totalof3Q19and1Q20RepurchaseProgramsMember_0110236FB3DA02AD1CD988C62661324D" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Total of 3Q19 and 1Q20 Repurchase Programs</link:label>
    <link:label id="lab_rdn_Totalof3Q19and1Q20RepurchaseProgramsMember_0110236FB3DA02AD1CD988C62661324D_label_en-US" xlink:label="lab_rdn_Totalof3Q19and1Q20RepurchaseProgramsMember_0110236FB3DA02AD1CD988C62661324D" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Total of 3Q19 and 1Q20 Repurchase Programs [Member]</link:label>
    <link:label id="lab_rdn_Totalof3Q19and1Q20RepurchaseProgramsMember_0110236FB3DA02AD1CD988C62661324D_documentation_en-US" xlink:label="lab_rdn_Totalof3Q19and1Q20RepurchaseProgramsMember_0110236FB3DA02AD1CD988C62661324D" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Total of 3Q19 and 1Q20 Repurchase Programs [Member]</link:label>
    <link:loc xlink:href="rdn-20191231.xsd#rdn_Totalof3Q19and1Q20RepurchaseProgramsMember" xlink:label="loc_rdn_Totalof3Q19and1Q20RepurchaseProgramsMember_0110236FB3DA02AD1CD988C62661324D" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_rdn_Totalof3Q19and1Q20RepurchaseProgramsMember_0110236FB3DA02AD1CD988C62661324D" xlink:to="lab_rdn_Totalof3Q19and1Q20RepurchaseProgramsMember_0110236FB3DA02AD1CD988C62661324D" xlink:type="arc" />
    <link:label id="lab_rdn_A3Q17RepurchaseProgramMember_8F4135DD44934323985688C62661F891_terseLabel_en-US" xlink:label="lab_rdn_A3Q17RepurchaseProgramMember_8F4135DD44934323985688C62661F891" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">3Q17 Repurchase Program</link:label>
    <link:label id="lab_rdn_A3Q17RepurchaseProgramMember_8F4135DD44934323985688C62661F891_label_en-US" xlink:label="lab_rdn_A3Q17RepurchaseProgramMember_8F4135DD44934323985688C62661F891" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">3Q17 Repurchase Program [Member]</link:label>
    <link:label id="lab_rdn_A3Q17RepurchaseProgramMember_8F4135DD44934323985688C62661F891_documentation_en-US" xlink:label="lab_rdn_A3Q17RepurchaseProgramMember_8F4135DD44934323985688C62661F891" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">3Q2017 Repurchase Program [Member]</link:label>
    <link:loc xlink:href="rdn-20191231.xsd#rdn_A3Q17RepurchaseProgramMember" xlink:label="loc_rdn_A3Q17RepurchaseProgramMember_8F4135DD44934323985688C62661F891" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_rdn_A3Q17RepurchaseProgramMember_8F4135DD44934323985688C62661F891" xlink:to="lab_rdn_A3Q17RepurchaseProgramMember_8F4135DD44934323985688C62661F891" xlink:type="arc" />
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    <link:label id="lab_us-gaap_LesseeOperatingLeaseTermOfContract_6C836F703292240006498203D4FCAEE0_terseLabel_en-US" xlink:label="lab_us-gaap_LesseeOperatingLeaseTermOfContract_6C836F703292240006498203D4FCAEE0" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Lessee, Operating Lease, Term of Contract</link:label>
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    <link:label id="lab_rdn_MaximumMaturityDurationForShortTermInvestmentGrouping_C5508F79772869F5613F8203D4FD9E87_documentation_en-US" xlink:label="lab_rdn_MaximumMaturityDurationForShortTermInvestmentGrouping_C5508F79772869F5613F8203D4FD9E87" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">This represents the maximum maturity duration when determining the investments in the portfolio which are grouped as short-term investments.</link:label>
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    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_OperatingLeaseLiability" xlink:label="loc_us-gaap_OperatingLeaseLiability_A1EC937A181AFCA13FFB8203D4FEFFA8" xlink:type="locator" />
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    <link:loc xlink:href="rdn-20191231.xsd#rdn_StateInsuranceRegulationsMember" xlink:label="loc_rdn_StateInsuranceRegulationsMember_047BCC27B89F0932733A6382A86FABEB" xlink:type="locator" />
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    <link:label id="lab_rdn_NonRBCStatesMember_C3A0E852CF561F6702B06382A8707E5D_terseLabel_en-US" xlink:label="lab_rdn_NonRBCStatesMember_C3A0E852CF561F6702B06382A8707E5D" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Non RBC States</link:label>
    <link:label id="lab_rdn_NonRBCStatesMember_C3A0E852CF561F6702B06382A8707E5D_label_en-US" xlink:label="lab_rdn_NonRBCStatesMember_C3A0E852CF561F6702B06382A8707E5D" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Non RBC States [Member]</link:label>
    <link:label id="lab_rdn_NonRBCStatesMember_C3A0E852CF561F6702B06382A8707E5D_documentation_en-US" xlink:label="lab_rdn_NonRBCStatesMember_C3A0E852CF561F6702B06382A8707E5D" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">This member represents the states where there is not a risk-based capital requirement however there is a minimum statutory capital requirement.</link:label>
    <link:loc xlink:href="rdn-20191231.xsd#rdn_NonRBCStatesMember" xlink:label="loc_rdn_NonRBCStatesMember_C3A0E852CF561F6702B06382A8707E5D" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_rdn_NonRBCStatesMember_C3A0E852CF561F6702B06382A8707E5D" xlink:to="lab_rdn_NonRBCStatesMember_C3A0E852CF561F6702B06382A8707E5D" xlink:type="arc" />
    <link:label id="lab_rdn_RiskToCapitalLineItemsLineItems_58F2F64360CAA6EF99126382A872A266_terseLabel_en-US" xlink:label="lab_rdn_RiskToCapitalLineItemsLineItems_58F2F64360CAA6EF99126382A872A266" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Risk to Capital Line Items [Line Items]</link:label>
    <link:label id="lab_rdn_RiskToCapitalLineItemsLineItems_58F2F64360CAA6EF99126382A872A266_label_en-US" xlink:label="lab_rdn_RiskToCapitalLineItemsLineItems_58F2F64360CAA6EF99126382A872A266" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Risk to Capital Line Items [Line Items]</link:label>
    <link:label id="lab_rdn_RiskToCapitalLineItemsLineItems_58F2F64360CAA6EF99126382A872A266_documentation_en-US" xlink:label="lab_rdn_RiskToCapitalLineItemsLineItems_58F2F64360CAA6EF99126382A872A266" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Risk to Capital Line Items [Line Items]</link:label>
    <link:loc xlink:href="rdn-20191231.xsd#rdn_RiskToCapitalLineItemsLineItems" xlink:label="loc_rdn_RiskToCapitalLineItemsLineItems_58F2F64360CAA6EF99126382A872A266" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_rdn_RiskToCapitalLineItemsLineItems_58F2F64360CAA6EF99126382A872A266" xlink:to="lab_rdn_RiskToCapitalLineItemsLineItems_58F2F64360CAA6EF99126382A872A266" xlink:type="arc" />
    <link:label id="lab_rdn_NumberOfStatesThatHaveStatutoryOrRegulatoryRiskBasedCapitalRequirement_5441FB40F27B143614976382A8723FEC_terseLabel_en-US" xlink:label="lab_rdn_NumberOfStatesThatHaveStatutoryOrRegulatoryRiskBasedCapitalRequirement_5441FB40F27B143614976382A8723FEC" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Number Of States That Have A Statutory Or Regulatory Risk Based Capital Requirement</link:label>
    <link:label id="lab_rdn_NumberOfStatesThatHaveStatutoryOrRegulatoryRiskBasedCapitalRequirement_5441FB40F27B143614976382A8723FEC_label_en-US" xlink:label="lab_rdn_NumberOfStatesThatHaveStatutoryOrRegulatoryRiskBasedCapitalRequirement_5441FB40F27B143614976382A8723FEC" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Number Of States That Have A Statutory Or Regulatory Risk Based Capital Requirement</link:label>
    <link:label id="lab_rdn_NumberOfStatesThatHaveStatutoryOrRegulatoryRiskBasedCapitalRequirement_5441FB40F27B143614976382A8723FEC_documentation_en-US" xlink:label="lab_rdn_NumberOfStatesThatHaveStatutoryOrRegulatoryRiskBasedCapitalRequirement_5441FB40F27B143614976382A8723FEC" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Number Of States That Have A Statutory Or Regulatory Risk Based Capital Requirement</link:label>
    <link:loc xlink:href="rdn-20191231.xsd#rdn_NumberOfStatesThatHaveStatutoryOrRegulatoryRiskBasedCapitalRequirement" xlink:label="loc_rdn_NumberOfStatesThatHaveStatutoryOrRegulatoryRiskBasedCapitalRequirement_5441FB40F27B143614976382A8723FEC" xlink:type="locator" />
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    <link:label id="lab_rdn_RiskToCapitalRatioRegulatoryMaximum_7DB20464B7C4CA4935F36382A872B3EA_terseLabel_en-US" xlink:label="lab_rdn_RiskToCapitalRatioRegulatoryMaximum_7DB20464B7C4CA4935F36382A872B3EA" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Risk To Capital Ratio, Regulatory Maximum</link:label>
    <link:label id="lab_rdn_RiskToCapitalRatioRegulatoryMaximum_7DB20464B7C4CA4935F36382A872B3EA_label_en-US" xlink:label="lab_rdn_RiskToCapitalRatioRegulatoryMaximum_7DB20464B7C4CA4935F36382A872B3EA" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Risk To Capital Ratio, Regulatory Maximum</link:label>
    <link:label id="lab_rdn_RiskToCapitalRatioRegulatoryMaximum_7DB20464B7C4CA4935F36382A872B3EA_documentation_en-US" xlink:label="lab_rdn_RiskToCapitalRatioRegulatoryMaximum_7DB20464B7C4CA4935F36382A872B3EA" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">This concept represents the maximum ratio of net risk in force (net of risk ceded through reinsurance contracts and risk in force on defaulted loans) to statutory capital (defined as the sum of statutory policyholders' surplus plus statutory contingency reserves) allowed in those states which have statutory risk-based capital requirements.</link:label>
    <link:loc xlink:href="rdn-20191231.xsd#rdn_RiskToCapitalRatioRegulatoryMaximum" xlink:label="loc_rdn_RiskToCapitalRatioRegulatoryMaximum_7DB20464B7C4CA4935F36382A872B3EA" xlink:type="locator" />
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    <link:label id="lab_us-gaap_CapitalRequiredForCapitalAdequacy_63198617362F8ECD102B6382A8721222_terseLabel_en-US" xlink:label="lab_us-gaap_CapitalRequiredForCapitalAdequacy_63198617362F8ECD102B6382A8721222" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Capital Required for Capital Adequacy</link:label>
    <link:label id="lab_us-gaap_CapitalRequiredForCapitalAdequacy_63198617362F8ECD102B6382A8721222_label_en-US" xlink:label="lab_us-gaap_CapitalRequiredForCapitalAdequacy_63198617362F8ECD102B6382A8721222" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Capital Required for Capital Adequacy</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_CapitalRequiredForCapitalAdequacy" xlink:label="loc_us-gaap_CapitalRequiredForCapitalAdequacy_63198617362F8ECD102B6382A8721222" xlink:type="locator" />
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    <link:label id="lab_rdn_NetRiskInForce_A4383819FE7C993433456382A872610B_terseLabel_en-US" xlink:label="lab_rdn_NetRiskInForce_A4383819FE7C993433456382A872610B" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Net Risk In Force</link:label>
    <link:label id="lab_rdn_NetRiskInForce_A4383819FE7C993433456382A872610B_label_en-US" xlink:label="lab_rdn_NetRiskInForce_A4383819FE7C993433456382A872610B" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Net Risk In Force</link:label>
    <link:label id="lab_rdn_NetRiskInForce_A4383819FE7C993433456382A872610B_documentation_en-US" xlink:label="lab_rdn_NetRiskInForce_A4383819FE7C993433456382A872610B" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">This concept represents the risk in force (an estimate of the maximum loss exposure that an entity has at any point in time) net of risk ceded through reinsurance contracts and net of risk in force on defaulted loans.</link:label>
    <link:loc xlink:href="rdn-20191231.xsd#rdn_NetRiskInForce" xlink:label="loc_rdn_NetRiskInForce_A4383819FE7C993433456382A872610B" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_rdn_NetRiskInForce_A4383819FE7C993433456382A872610B" xlink:to="lab_rdn_NetRiskInForce_A4383819FE7C993433456382A872610B" xlink:type="arc" />
    <link:label id="lab_us-gaap_Capital_4D3D41B66D4EA3B9A24D6382A87236B8_terseLabel_en-US" xlink:label="lab_us-gaap_Capital_4D3D41B66D4EA3B9A24D6382A87236B8" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Common stock and paid-in capital</link:label>
    <link:label id="lab_us-gaap_Capital_4D3D41B66D4EA3B9A24D6382A87236B8_label_en-US" xlink:label="lab_us-gaap_Capital_4D3D41B66D4EA3B9A24D6382A87236B8" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Capital</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_Capital" xlink:label="loc_us-gaap_Capital_4D3D41B66D4EA3B9A24D6382A87236B8" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_Capital_4D3D41B66D4EA3B9A24D6382A87236B8" xlink:to="lab_us-gaap_Capital_4D3D41B66D4EA3B9A24D6382A87236B8" xlink:type="arc" />
    <link:label id="lab_us-gaap_CumulativeEarningsDeficit_4F2C6599B3F98F86BBBD6382A873EAE7_terseLabel_en-US" xlink:label="lab_us-gaap_CumulativeEarningsDeficit_4F2C6599B3F98F86BBBD6382A873EAE7" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Unassigned earnings (deficit)</link:label>
    <link:label id="lab_us-gaap_CumulativeEarningsDeficit_4F2C6599B3F98F86BBBD6382A873EAE7_label_en-US" xlink:label="lab_us-gaap_CumulativeEarningsDeficit_4F2C6599B3F98F86BBBD6382A873EAE7" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Cumulative Earnings (Deficit)</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_CumulativeEarningsDeficit" xlink:label="loc_us-gaap_CumulativeEarningsDeficit_4F2C6599B3F98F86BBBD6382A873EAE7" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_CumulativeEarningsDeficit_4F2C6599B3F98F86BBBD6382A873EAE7" xlink:to="lab_us-gaap_CumulativeEarningsDeficit_4F2C6599B3F98F86BBBD6382A873EAE7" xlink:type="arc" />
    <link:label id="lab_rdn_StatutoryAccountingPracticesContingencyReserve_782B7EA6246EFE3CB43C6382A873BBA1_verboseLabel_en-US" xlink:label="lab_rdn_StatutoryAccountingPracticesContingencyReserve_782B7EA6246EFE3CB43C6382A873BBA1" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Contingency reserve</link:label>
    <link:loc xlink:href="rdn-20191231.xsd#rdn_StatutoryAccountingPracticesContingencyReserve" xlink:label="loc_rdn_StatutoryAccountingPracticesContingencyReserve_782B7EA6246EFE3CB43C6382A873BBA1" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_rdn_StatutoryAccountingPracticesContingencyReserve_782B7EA6246EFE3CB43C6382A873BBA1" xlink:to="lab_rdn_StatutoryAccountingPracticesContingencyReserve_782B7EA6246EFE3CB43C6382A873BBA1" xlink:type="arc" />
    <link:label id="lab_rdn_StatutoryAccountingPracticeStatutoryPosition_971516DBA4077837F2BA6382A873EA54_totalLabel_en-US" xlink:label="lab_rdn_StatutoryAccountingPracticeStatutoryPosition_971516DBA4077837F2BA6382A873EA54" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="en-US">Statutory Accounting Practice, Statutory Position</link:label>
    <link:label id="lab_rdn_StatutoryAccountingPracticeStatutoryPosition_971516DBA4077837F2BA6382A873EA54_label_en-US" xlink:label="lab_rdn_StatutoryAccountingPracticeStatutoryPosition_971516DBA4077837F2BA6382A873EA54" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Statutory Accounting Practice, Statutory Position</link:label>
    <link:label id="lab_rdn_StatutoryAccountingPracticeStatutoryPosition_971516DBA4077837F2BA6382A873EA54_documentation_en-US" xlink:label="lab_rdn_StatutoryAccountingPracticeStatutoryPosition_971516DBA4077837F2BA6382A873EA54" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">This concept represents statutory surplus plus contingency reserves, the total of which is used in the calculation of risk to capital.</link:label>
    <link:loc xlink:href="rdn-20191231.xsd#rdn_StatutoryAccountingPracticeStatutoryPosition" xlink:label="loc_rdn_StatutoryAccountingPracticeStatutoryPosition_971516DBA4077837F2BA6382A873EA54" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_rdn_StatutoryAccountingPracticeStatutoryPosition_971516DBA4077837F2BA6382A873EA54" xlink:to="lab_rdn_StatutoryAccountingPracticeStatutoryPosition_971516DBA4077837F2BA6382A873EA54" xlink:type="arc" />
    <link:label id="lab_rdn_RiskToCapitalRatio_A42128B357C34EB820106382A874B439_terseLabel_en-US" xlink:label="lab_rdn_RiskToCapitalRatio_A42128B357C34EB820106382A874B439" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Risk-to-capital</link:label>
    <link:label id="lab_rdn_RiskToCapitalRatio_A42128B357C34EB820106382A874B439_label_en-US" xlink:label="lab_rdn_RiskToCapitalRatio_A42128B357C34EB820106382A874B439" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Risk To Capital Ratio</link:label>
    <link:label id="lab_rdn_RiskToCapitalRatio_A42128B357C34EB820106382A874B439_documentation_en-US" xlink:label="lab_rdn_RiskToCapitalRatio_A42128B357C34EB820106382A874B439" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">This concept represents an entity's ratio of net risk in force (excludes risk ceded through reinsurance contracts and risk in force on defaulted loans) to the amount of statutory capital (defined as the sum of statutory policyholders' surplus plus statutory contingency reserves).</link:label>
    <link:loc xlink:href="rdn-20191231.xsd#rdn_RiskToCapitalRatio" xlink:label="loc_rdn_RiskToCapitalRatio_A42128B357C34EB820106382A874B439" xlink:type="locator" />
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    <link:label id="lab_srt_SupplementalScheduleOfReinsurancePremiumsForInsuranceCompaniesAbstract_A5106B7832C35C33837B6EC888E67DFF_label_en-US" xlink:label="lab_srt_SupplementalScheduleOfReinsurancePremiumsForInsuranceCompaniesAbstract_A5106B7832C35C33837B6EC888E67DFF" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">SEC Schedule, 12-17, Insurance Companies, Reinsurance [Abstract]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/srt/2019/elts/srt-2019-01-31.xsd#srt_SupplementalScheduleOfReinsurancePremiumsForInsuranceCompaniesAbstract" xlink:label="loc_srt_SupplementalScheduleOfReinsurancePremiumsForInsuranceCompaniesAbstract_A5106B7832C35C33837B6EC888E67DFF" xlink:type="locator" />
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    <link:label id="lab_rdn_FundsHeldUnderReinsuranceAgreementsOffBalanceSheetAsset_9121666E7F8523B0D0106EE1253EBA9F_terseLabel_en-US" xlink:label="lab_rdn_FundsHeldUnderReinsuranceAgreementsOffBalanceSheetAsset_9121666E7F8523B0D0106EE1253EBA9F" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Funds Held Under Reinsurance Agreements, Off-Balance Sheet, Asset</link:label>
    <link:label id="lab_rdn_FundsHeldUnderReinsuranceAgreementsOffBalanceSheetAsset_9121666E7F8523B0D0106EE1253EBA9F_label_en-US" xlink:label="lab_rdn_FundsHeldUnderReinsuranceAgreementsOffBalanceSheetAsset_9121666E7F8523B0D0106EE1253EBA9F" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Funds Held Under Reinsurance Agreements, Off-Balance Sheet, Asset</link:label>
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    <link:loc xlink:href="rdn-20191231.xsd#rdn_FundsHeldUnderReinsuranceAgreementsOffBalanceSheetAsset" xlink:label="loc_rdn_FundsHeldUnderReinsuranceAgreementsOffBalanceSheetAsset_9121666E7F8523B0D0106EE1253EBA9F" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_rdn_FundsHeldUnderReinsuranceAgreementsOffBalanceSheetAsset_9121666E7F8523B0D0106EE1253EBA9F" xlink:to="lab_rdn_FundsHeldUnderReinsuranceAgreementsOffBalanceSheetAsset_9121666E7F8523B0D0106EE1253EBA9F" xlink:type="arc" />
    <link:label id="lab_rdn_CondensedConsolidatedStatementsOfCashFlowsAbstract_9E176A1179E59AAC149C8D7EE1EDD4A6_label_en-US" xlink:label="lab_rdn_CondensedConsolidatedStatementsOfCashFlowsAbstract_9E176A1179E59AAC149C8D7EE1EDD4A6" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Condensed Consolidated Statements of Cash Flows [Abstract]</link:label>
    <link:label id="lab_rdn_CondensedConsolidatedStatementsOfCashFlowsAbstract_9E176A1179E59AAC149C8D7EE1EDD4A6_documentation_en-US" xlink:label="lab_rdn_CondensedConsolidatedStatementsOfCashFlowsAbstract_9E176A1179E59AAC149C8D7EE1EDD4A6" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Condensed Consolidated Statements of Cash Flows [Abstract]</link:label>
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    <link:label id="lab_us-gaap_DefinedContributionPlanMaximumAnnualContributionsPerEmployeeAmount_6943E0B5F25F215D37E882E3CABE8CF8_label_en-US" xlink:label="lab_us-gaap_DefinedContributionPlanMaximumAnnualContributionsPerEmployeeAmount_6943E0B5F25F215D37E882E3CABE8CF8" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Defined Contribution Plan, Maximum Annual Contributions Per Employee, Amount</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DefinedContributionPlanMaximumAnnualContributionsPerEmployeeAmount" xlink:label="loc_us-gaap_DefinedContributionPlanMaximumAnnualContributionsPerEmployeeAmount_6943E0B5F25F215D37E882E3CABE8CF8" xlink:type="locator" />
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    <link:label id="lab_rdn_DefinedContributionPlanEmployeeDiscretionaryContributionMaximumAmount_E860583A6A7BF1BBBF8982E3CABEB20C_terseLabel_en-US" xlink:label="lab_rdn_DefinedContributionPlanEmployeeDiscretionaryContributionMaximumAmount_E860583A6A7BF1BBBF8982E3CABEB20C" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Defined Benefit Plan, Employee Discretionary Contribution Maximum Catch-up Amount</link:label>
    <link:label id="lab_rdn_DefinedContributionPlanEmployeeDiscretionaryContributionMaximumAmount_E860583A6A7BF1BBBF8982E3CABEB20C_label_en-US" xlink:label="lab_rdn_DefinedContributionPlanEmployeeDiscretionaryContributionMaximumAmount_E860583A6A7BF1BBBF8982E3CABEB20C" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Defined Contribution Plan, Employee Discretionary Contribution Maximum Amount</link:label>
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    <link:label id="lab_us-gaap_DefinedContributionPlanEmployersMatchingContributionAnnualVestingPercentage_976E8C854D64345C073E82E3CABF8E25_label_en-US" xlink:label="lab_us-gaap_DefinedContributionPlanEmployersMatchingContributionAnnualVestingPercentage_976E8C854D64345C073E82E3CABF8E25" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Defined Contribution Plan, Employers Matching Contribution, Annual Vesting Percentage</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DefinedContributionPlanEmployersMatchingContributionAnnualVestingPercentage" xlink:label="loc_us-gaap_DefinedContributionPlanEmployersMatchingContributionAnnualVestingPercentage_976E8C854D64345C073E82E3CABF8E25" xlink:type="locator" />
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    <link:label id="lab_us-gaap_DefinedContributionPlanEmployerMatchingContributionPercent_A68858A6D881833630B682E3CABF30DA_terseLabel_en-US" xlink:label="lab_us-gaap_DefinedContributionPlanEmployerMatchingContributionPercent_A68858A6D881833630B682E3CABF30DA" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Defined Contribution Plan Percentage Of Base Earnings Qualifying For Parent Company Matching Contribution</link:label>
    <link:label id="lab_us-gaap_DefinedContributionPlanEmployerMatchingContributionPercent_A68858A6D881833630B682E3CABF30DA_label_en-US" xlink:label="lab_us-gaap_DefinedContributionPlanEmployerMatchingContributionPercent_A68858A6D881833630B682E3CABF30DA" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Defined Contribution Plan, Employer Matching Contribution, Percent of Employees' Gross Pay</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DefinedContributionPlanEmployerMatchingContributionPercent" xlink:label="loc_us-gaap_DefinedContributionPlanEmployerMatchingContributionPercent_A68858A6D881833630B682E3CABF30DA" xlink:type="locator" />
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    <link:label id="lab_us-gaap_DefinedContributionPlanCostRecognized_77809F4E1394B6FA3D7B82E3CABF796E_terseLabel_en-US" xlink:label="lab_us-gaap_DefinedContributionPlanCostRecognized_77809F4E1394B6FA3D7B82E3CABF796E" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Defined Contribution Plan, Cost</link:label>
    <link:label id="lab_us-gaap_DefinedContributionPlanCostRecognized_77809F4E1394B6FA3D7B82E3CABF796E_label_en-US" xlink:label="lab_us-gaap_DefinedContributionPlanCostRecognized_77809F4E1394B6FA3D7B82E3CABF796E" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Defined Contribution Plan, Cost</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DefinedContributionPlanCostRecognized" xlink:label="loc_us-gaap_DefinedContributionPlanCostRecognized_77809F4E1394B6FA3D7B82E3CABF796E" xlink:type="locator" />
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    <link:label id="lab_rdn_DefinedContributionPlanEmployerMatchingContributionArrangementwithIndividualRequisiteServicePeriod_D130491697E6FD52913182E3CABF6459_terseLabel_en-US" xlink:label="lab_rdn_DefinedContributionPlanEmployerMatchingContributionArrangementwithIndividualRequisiteServicePeriod_D130491697E6FD52913182E3CABF6459" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Defined Contribution Plan, Employer Matching Contribution, Arrangement with Individual Requisite Service Period</link:label>
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    <link:loc xlink:href="rdn-20191231.xsd#rdn_DefinedContributionPlanEmployerMatchingContributionArrangementwithIndividualRequisiteServicePeriod" xlink:label="loc_rdn_DefinedContributionPlanEmployerMatchingContributionArrangementwithIndividualRequisiteServicePeriod_D130491697E6FD52913182E3CABF6459" xlink:type="locator" />
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    <link:label id="lab_us-gaap_ScheduleOfShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeTable_5B3FC0C0E43799C93732798BE4E03484_terseLabel_en-US" xlink:label="lab_us-gaap_ScheduleOfShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeTable_5B3FC0C0E43799C93732798BE4E03484" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Share-based Payment Arrangement, Option, Exercise Price Range [Table]</link:label>
    <link:label id="lab_us-gaap_ScheduleOfShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeTable_5B3FC0C0E43799C93732798BE4E03484_label_en-US" xlink:label="lab_us-gaap_ScheduleOfShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeTable_5B3FC0C0E43799C93732798BE4E03484" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Share-based Payment Arrangement, Option, Exercise Price Range [Table]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ScheduleOfShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeTable" xlink:label="loc_us-gaap_ScheduleOfShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeTable_5B3FC0C0E43799C93732798BE4E03484" xlink:type="locator" />
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    <link:label id="lab_us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis_35677FBF67FD4E206129798BE4E1D3BF_terseLabel_en-US" xlink:label="lab_us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis_35677FBF67FD4E206129798BE4E1D3BF" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Exercise Price Range [Axis]</link:label>
    <link:label id="lab_us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis_35677FBF67FD4E206129798BE4E1D3BF_label_en-US" xlink:label="lab_us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis_35677FBF67FD4E206129798BE4E1D3BF" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Exercise Price Range [Axis]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis" xlink:label="loc_us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis_35677FBF67FD4E206129798BE4E1D3BF" xlink:type="locator" />
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    <link:label id="lab_us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeDomain_F50750E1EA7B39C3B064798BE4E1E940_label_en-US" xlink:label="lab_us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeDomain_F50750E1EA7B39C3B064798BE4E1E940" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Exercise Price Range [Domain]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeDomain" xlink:label="loc_us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeDomain_F50750E1EA7B39C3B064798BE4E1E940" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeDomain_F50750E1EA7B39C3B064798BE4E1E940" xlink:to="lab_us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeDomain_F50750E1EA7B39C3B064798BE4E1E940" xlink:type="arc" />
    <link:label id="lab_rdn_ExercisePriceRangeOneMember_179822BB7834B06CD6F9798BE4E1954B_terseLabel_en-US" xlink:label="lab_rdn_ExercisePriceRangeOneMember_179822BB7834B06CD6F9798BE4E1954B" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">$2.45 - $3.58</link:label>
    <link:label id="lab_rdn_ExercisePriceRangeOneMember_179822BB7834B06CD6F9798BE4E1954B_label_en-US" xlink:label="lab_rdn_ExercisePriceRangeOneMember_179822BB7834B06CD6F9798BE4E1954B" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Exercise Price Range, One [Member]</link:label>
    <link:label id="lab_rdn_ExercisePriceRangeOneMember_179822BB7834B06CD6F9798BE4E1954B_documentation_en-US" xlink:label="lab_rdn_ExercisePriceRangeOneMember_179822BB7834B06CD6F9798BE4E1954B" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Exercise Price Range, One [Member]</link:label>
    <link:loc xlink:href="rdn-20191231.xsd#rdn_ExercisePriceRangeOneMember" xlink:label="loc_rdn_ExercisePriceRangeOneMember_179822BB7834B06CD6F9798BE4E1954B" xlink:type="locator" />
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    <link:label id="lab_rdn_ExercisePriceRangeThreeMember_C5CE67B58037BCF10CA3798BE4E253A3_terseLabel_en-US" xlink:label="lab_rdn_ExercisePriceRangeThreeMember_C5CE67B58037BCF10CA3798BE4E253A3" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">$10.42 - $15.44</link:label>
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    <link:label id="lab_rdn_ExercisePriceRangeThreeMember_C5CE67B58037BCF10CA3798BE4E253A3_documentation_en-US" xlink:label="lab_rdn_ExercisePriceRangeThreeMember_C5CE67B58037BCF10CA3798BE4E253A3" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Exercise Price Range, Three [Member]</link:label>
    <link:loc xlink:href="rdn-20191231.xsd#rdn_ExercisePriceRangeThreeMember" xlink:label="loc_rdn_ExercisePriceRangeThreeMember_C5CE67B58037BCF10CA3798BE4E253A3" xlink:type="locator" />
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    <link:label id="lab_rdn_ExercisePriceRangeFourMember_344D80E2C0867C3C5925798BE4E2E16C_terseLabel_en-US" xlink:label="lab_rdn_ExercisePriceRangeFourMember_344D80E2C0867C3C5925798BE4E2E16C" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">$18.42</link:label>
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    <link:label id="lab_rdn_ExercisePriceRangeFourMember_344D80E2C0867C3C5925798BE4E2E16C_documentation_en-US" xlink:label="lab_rdn_ExercisePriceRangeFourMember_344D80E2C0867C3C5925798BE4E2E16C" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Exercise Price Range, Four [Member]</link:label>
    <link:loc xlink:href="rdn-20191231.xsd#rdn_ExercisePriceRangeFourMember" xlink:label="loc_rdn_ExercisePriceRangeFourMember_344D80E2C0867C3C5925798BE4E2E16C" xlink:type="locator" />
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