<?xml version="1.0" encoding="US-ASCII"?>
<!--XBRL Document Created with Wdesk from Workiva-->
<!-- -->
<xsd:schema attributeFormDefault="unqualified" elementFormDefault="qualified" targetNamespace="http://www.mgic.com/20191231" xmlns:link="http://www.xbrl.org/2003/linkbase" xmlns:mtg="http://www.mgic.com/20191231" xmlns:nonnum="http://www.xbrl.org/dtr/type/non-numeric" xmlns:num="http://www.xbrl.org/dtr/type/numeric" xmlns:xbrldt="http://xbrl.org/2005/xbrldt" xmlns:xbrli="http://www.xbrl.org/2003/instance" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsd="http://www.w3.org/2001/XMLSchema">
  <xsd:import namespace="http://fasb.org/srt-types/2019-01-31" schemaLocation="http://xbrl.fasb.org/srt/2019/elts/srt-types-2019-01-31.xsd" />
  <xsd:import namespace="http://fasb.org/srt/2019-01-31" schemaLocation="http://xbrl.fasb.org/srt/2019/elts/srt-2019-01-31.xsd" />
  <xsd:import namespace="http://fasb.org/us-gaap/2019-01-31" schemaLocation="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd" />
  <xsd:import namespace="http://fasb.org/us-roles/2019-01-31" schemaLocation="http://xbrl.fasb.org/us-gaap/2019/elts/us-roles-2019-01-31.xsd" />
  <xsd:import namespace="http://fasb.org/us-types/2019-01-31" schemaLocation="http://xbrl.fasb.org/us-gaap/2019/elts/us-types-2019-01-31.xsd" />
  <xsd:import namespace="http://www.xbrl.org/2003/instance" schemaLocation="http://www.xbrl.org/2003/xbrl-instance-2003-12-31.xsd" />
  <xsd:import namespace="http://www.xbrl.org/2003/linkbase" schemaLocation="http://www.xbrl.org/2003/xbrl-linkbase-2003-12-31.xsd" />
  <xsd:import namespace="http://www.xbrl.org/2009/arcrole/fact-explanatoryFact" schemaLocation="http://www.xbrl.org/lrr/arcrole/factExplanatory-2009-12-16.xsd" />
  <xsd:import namespace="http://www.xbrl.org/2009/role/negated" schemaLocation="http://www.xbrl.org/lrr/role/negated-2009-12-16.xsd" />
  <xsd:import namespace="http://www.xbrl.org/2009/role/net" schemaLocation="http://www.xbrl.org/lrr/role/net-2009-12-16.xsd" />
  <xsd:import namespace="http://www.xbrl.org/dtr/type/non-numeric" schemaLocation="http://www.xbrl.org/dtr/type/nonNumeric-2009-12-16.xsd" />
  <xsd:import namespace="http://www.xbrl.org/dtr/type/numeric" schemaLocation="http://www.xbrl.org/dtr/type/numeric-2009-12-16.xsd" />
  <xsd:import namespace="http://xbrl.org/2005/xbrldt" schemaLocation="http://www.xbrl.org/2005/xbrldt-2005.xsd" />
  <xsd:import namespace="http://xbrl.sec.gov/country/2017-01-31" schemaLocation="https://xbrl.sec.gov/country/2017/country-2017-01-31.xsd" />
  <xsd:import namespace="http://xbrl.sec.gov/currency/2019-01-31" schemaLocation="https://xbrl.sec.gov/currency/2019/currency-2019-01-31.xsd" />
  <xsd:import namespace="http://xbrl.sec.gov/dei/2019-01-31" schemaLocation="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd" />
  <xsd:import namespace="http://xbrl.sec.gov/exch/2019-01-31" schemaLocation="https://xbrl.sec.gov/exch/2019/exch-2019-01-31.xsd" />
  <xsd:import namespace="http://xbrl.sec.gov/invest/2013-01-31" schemaLocation="http://xbrl.sec.gov/invest/2013/invest-2013-01-31.xsd" />
  <xsd:import namespace="http://xbrl.sec.gov/naics/2017-01-31" schemaLocation="http://xbrl.sec.gov/naics/2017/naics-2017-01-31.xsd" />
  <xsd:import namespace="http://xbrl.sec.gov/sic/2011-01-31" schemaLocation="http://xbrl.sec.gov/sic/2011/sic-2011-01-31.xsd" />
  <xsd:import namespace="http://xbrl.sec.gov/stpr/2018-01-31" schemaLocation="https://xbrl.sec.gov/stpr/2018/stpr-2018-01-31.xsd" />
  <xsd:annotation>
    <xsd:appinfo>
      <link:linkbaseRef xlink:arcrole="http://www.w3.org/1999/xlink/properties/linkbase" xlink:href="mtg-20191231_cal.xml" xlink:role="http://www.xbrl.org/2003/role/calculationLinkbaseRef" xlink:type="simple" />
      <link:linkbaseRef xlink:arcrole="http://www.w3.org/1999/xlink/properties/linkbase" xlink:href="mtg-20191231_def.xml" xlink:role="http://www.xbrl.org/2003/role/definitionLinkbaseRef" xlink:type="simple" />
      <link:linkbaseRef xlink:arcrole="http://www.w3.org/1999/xlink/properties/linkbase" xlink:href="mtg-20191231_lab.xml" xlink:role="http://www.xbrl.org/2003/role/labelLinkbaseRef" xlink:type="simple" />
      <link:linkbaseRef xlink:arcrole="http://www.w3.org/1999/xlink/properties/linkbase" xlink:href="mtg-20191231_pre.xml" xlink:role="http://www.xbrl.org/2003/role/presentationLinkbaseRef" xlink:type="simple" />
      <link:roleType id="BasisOfPresentation" roleURI="http://www.mgic.com/role/BasisOfPresentation">
        <link:definition>2102100 - Disclosure - Basis of Presentation</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="BenefitPlans" roleURI="http://www.mgic.com/role/BenefitPlans">
        <link:definition>2112100 - Disclosure - Benefit Plans</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="BenefitPlansAccumulatedOtherComprehensiveIncomeDetails" roleURI="http://www.mgic.com/role/BenefitPlansAccumulatedOtherComprehensiveIncomeDetails">
        <link:definition>2412404 - Disclosure - Benefit Plans - Accumulated Other Comprehensive Income (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="BenefitPlansActuarialAssumptionsAndYearEndAssetAllocationsDetails" roleURI="http://www.mgic.com/role/BenefitPlansActuarialAssumptionsAndYearEndAssetAllocationsDetails">
        <link:definition>2412408 - Disclosure - Benefit Plans - Actuarial Assumptions and Year-End Asset Allocations (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="BenefitPlansAdditionalDisclosuresDetails" roleURI="http://www.mgic.com/role/BenefitPlansAdditionalDisclosuresDetails">
        <link:definition>2412410 - Disclosure - Benefit Plans - Additional Disclosures (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="BenefitPlansChangeInAccumulatedOtherComprehensiveIncomeAociAndExpectedAmortizationDetails" roleURI="http://www.mgic.com/role/BenefitPlansChangeInAccumulatedOtherComprehensiveIncomeAociAndExpectedAmortizationDetails">
        <link:definition>2412407 - Disclosure - Benefit Plans - Change in Accumulated Other Comprehensive Income (AOCI) and Expected Amortization (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="BenefitPlansChangeInPlanAssetsDetails" roleURI="http://www.mgic.com/role/BenefitPlansChangeInPlanAssetsDetails">
        <link:definition>2412406 - Disclosure - Benefit Plans - Change in Plan Assets (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="BenefitPlansChangeInProjectBenefitAccumulatedBenefitObligationsDetails" roleURI="http://www.mgic.com/role/BenefitPlansChangeInProjectBenefitAccumulatedBenefitObligationsDetails">
        <link:definition>2412405 - Disclosure - Benefit Plans - Change in Project Benefit/Accumulated Benefit Obligations (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="BenefitPlansComponentsOfNetPeriodicBenefitCostsDetails" roleURI="http://www.mgic.com/role/BenefitPlansComponentsOfNetPeriodicBenefitCostsDetails">
        <link:definition>2412402 - Disclosure - Benefit Plans - Components of Net Periodic Benefit Costs (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="BenefitPlansDevelopmentOfFundedStatusDetails" roleURI="http://www.mgic.com/role/BenefitPlansDevelopmentOfFundedStatusDetails">
        <link:definition>2412403 - Disclosure - Benefit Plans - Development of Funded Status (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="BenefitPlansFairValueOfPlanAssetsDetails" roleURI="http://www.mgic.com/role/BenefitPlansFairValueOfPlanAssetsDetails">
        <link:definition>2412409 - Disclosure - Benefit Plans - Fair Value of Plan Assets (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="BenefitPlansNarrativeDetails" roleURI="http://www.mgic.com/role/BenefitPlansNarrativeDetails">
        <link:definition>2412411 - Disclosure - Benefit Plans - Narrative (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="BenefitPlansTables" roleURI="http://www.mgic.com/role/BenefitPlansTables">
        <link:definition>2312301 - Disclosure - Benefit Plans (Tables)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="ConsolidatedBalanceSheets" roleURI="http://www.mgic.com/role/ConsolidatedBalanceSheets">
        <link:definition>1002000 - Statement - CONSOLIDATED BALANCE SHEETS</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="ConsolidatedBalanceSheetsParenthetical" roleURI="http://www.mgic.com/role/ConsolidatedBalanceSheetsParenthetical">
        <link:definition>1002501 - Statement - CONSOLIDATED BALANCE SHEETS (Parenthetical)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="ConsolidatedStatementsOfCashFlows" roleURI="http://www.mgic.com/role/ConsolidatedStatementsOfCashFlows">
        <link:definition>1006000 - Statement - CONSOLIDATED STATEMENTS OF CASH FLOWS</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="ConsolidatedStatementsOfComprehensiveIncome" roleURI="http://www.mgic.com/role/ConsolidatedStatementsOfComprehensiveIncome">
        <link:definition>1004000 - Statement - CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="ConsolidatedStatementsOfOperations" roleURI="http://www.mgic.com/role/ConsolidatedStatementsOfOperations">
        <link:definition>1003000 - Statement - CONSOLIDATED STATEMENTS OF OPERATIONS</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="ConsolidatedStatementsOfShareholdersEquity" roleURI="http://www.mgic.com/role/ConsolidatedStatementsOfShareholdersEquity">
        <link:definition>1005000 - Statement - CONSOLIDATED STATEMENTS OF SHAREHOLDERS' EQUITY</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="Debt" roleURI="http://www.mgic.com/role/Debt">
        <link:definition>2107100 - Disclosure - Debt</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="DebtDetails" roleURI="http://www.mgic.com/role/DebtDetails">
        <link:definition>2407403 - Disclosure - Debt (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="DebtSummaryOfObligationsDetails" roleURI="http://www.mgic.com/role/DebtSummaryOfObligationsDetails">
        <link:definition>2407402 - Disclosure - Debt Summary of Obligations (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="DebtTables" roleURI="http://www.mgic.com/role/DebtTables">
        <link:definition>2307301 - Disclosure - Debt (Tables)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="DocumentAndEntityInformation" roleURI="http://www.mgic.com/role/DocumentAndEntityInformation">
        <link:definition>0001000 - Document - Document and Entity Information</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="EarningsPerShare" roleURI="http://www.mgic.com/role/EarningsPerShare">
        <link:definition>2104100 - Disclosure - Earnings per Share</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="EarningsPerShareDetails" roleURI="http://www.mgic.com/role/EarningsPerShareDetails">
        <link:definition>2404402 - Disclosure - Earnings per Share (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="EarningsPerShareTables" roleURI="http://www.mgic.com/role/EarningsPerShareTables">
        <link:definition>2304301 - Disclosure - Earnings per Share (Tables)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="FairValueMeasurements" roleURI="http://www.mgic.com/role/FairValueMeasurements">
        <link:definition>2106100 - Disclosure - Fair Value Measurements</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="FairValueMeasurementsAssetsAndLiabilitiesNotMeasuredAtFairValueDetails" roleURI="http://www.mgic.com/role/FairValueMeasurementsAssetsAndLiabilitiesNotMeasuredAtFairValueDetails">
        <link:definition>2406404 - Disclosure - Fair Value Measurements - Assets and Liabilities Not Measured at Fair Value (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="FairValueMeasurementsDetails" roleURI="http://www.mgic.com/role/FairValueMeasurementsDetails">
        <link:definition>2406402 - Disclosure - Fair Value Measurements (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="FairValueMeasurementsTables" roleURI="http://www.mgic.com/role/FairValueMeasurementsTables">
        <link:definition>2306301 - Disclosure - Fair Value Measurements (Tables)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="FairValueMeasurementsUnobservableInputReconciliationDetails" roleURI="http://www.mgic.com/role/FairValueMeasurementsUnobservableInputReconciliationDetails">
        <link:definition>2406403 - Disclosure - Fair Value Measurements - Unobservable Input Reconciliation (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="IncomeTaxes" roleURI="http://www.mgic.com/role/IncomeTaxes">
        <link:definition>2113100 - Disclosure - Income Taxes</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="IncomeTaxesDetails" roleURI="http://www.mgic.com/role/IncomeTaxesDetails">
        <link:definition>2413402 - Disclosure - Income Taxes (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="IncomeTaxesDetailsCalc2" roleURI="http://www.mgic.com/role/IncomeTaxesDetailsCalc2">
        <link:definition>2413402 - Disclosure - Income Taxes (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="IncomeTaxesTables" roleURI="http://www.mgic.com/role/IncomeTaxesTables">
        <link:definition>2313301 - Disclosure - Income Taxes (Tables)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="Investments" roleURI="http://www.mgic.com/role/Investments">
        <link:definition>2105100 - Disclosure - Investments</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="InvestmentsDetails" roleURI="http://www.mgic.com/role/InvestmentsDetails">
        <link:definition>2405402 - Disclosure - Investments (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="InvestmentsGainLossOnInvestmentsDetails" roleURI="http://www.mgic.com/role/InvestmentsGainLossOnInvestmentsDetails">
        <link:definition>2405404 - Disclosure - Investments, Gain (Loss) on Investments (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="InvestmentsInvestmentIncomeByCategoryDetails" roleURI="http://www.mgic.com/role/InvestmentsInvestmentIncomeByCategoryDetails">
        <link:definition>2405403 - Disclosure - Investments, Investment Income By Category (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="InvestmentsTables" roleURI="http://www.mgic.com/role/InvestmentsTables">
        <link:definition>2305301 - Disclosure - Investments (Tables)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="Leases" roleURI="http://www.mgic.com/role/Leases">
        <link:definition>2119100 - Disclosure - Leases</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="LeasesDetails" roleURI="http://www.mgic.com/role/LeasesDetails">
        <link:definition>2419402 - Disclosure - Leases (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="LeasesTables" roleURI="http://www.mgic.com/role/LeasesTables">
        <link:definition>2319301 - Disclosure - Leases (Tables)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="LitigationAndContingencies" roleURI="http://www.mgic.com/role/LitigationAndContingencies">
        <link:definition>2120100 - Disclosure - Litigation and Contingencies</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="LitigationAndContingenciesDetails" roleURI="http://www.mgic.com/role/LitigationAndContingenciesDetails">
        <link:definition>2420401 - Disclosure - Litigation and Contingencies (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="LossReserves" roleURI="http://www.mgic.com/role/LossReserves">
        <link:definition>2108100 - Disclosure - Loss Reserves</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="LossReservesAgingOfPrimaryDefaultInventoryAndNumberOfDelinquentPaymentsDetails" roleURI="http://www.mgic.com/role/LossReservesAgingOfPrimaryDefaultInventoryAndNumberOfDelinquentPaymentsDetails">
        <link:definition>2408406 - Disclosure - Loss Reserves - Aging of Primary Default Inventory and Number of Delinquent Payments (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="LossReservesDefaultInventoryReconciliationDetails" roleURI="http://www.mgic.com/role/LossReservesDefaultInventoryReconciliationDetails">
        <link:definition>2408405 - Disclosure - Loss Reserves - Default Inventory Reconciliation (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="LossReservesNarrativeDetails" roleURI="http://www.mgic.com/role/LossReservesNarrativeDetails">
        <link:definition>2408402 - Disclosure - Loss Reserves - Narrative (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="LossReservesPriorYearLossReservesDetails" roleURI="http://www.mgic.com/role/LossReservesPriorYearLossReservesDetails">
        <link:definition>2408404 - Disclosure - Loss Reserves - Prior Year Loss Reserves (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="LossReservesReconciliationOfChangesInLossReservesDetails" roleURI="http://www.mgic.com/role/LossReservesReconciliationOfChangesInLossReservesDetails">
        <link:definition>2408403 - Disclosure - Loss Reserves - Reconciliation of Changes in Loss Reserves (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="LossReservesTables" roleURI="http://www.mgic.com/role/LossReservesTables">
        <link:definition>2308301 - Disclosure - Loss Reserves (Tables)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="NatureOfBusiness" roleURI="http://www.mgic.com/role/NatureOfBusiness">
        <link:definition>2101100 - Disclosure - Nature of Business</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="NatureOfBusinessDetails" roleURI="http://www.mgic.com/role/NatureOfBusinessDetails">
        <link:definition>2401401 - Disclosure - Nature of Business (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="OtherComprehensiveIncomeLoss" roleURI="http://www.mgic.com/role/OtherComprehensiveIncomeLoss">
        <link:definition>2111100 - Disclosure - Other Comprehensive Income (Loss)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="OtherComprehensiveIncomeLossDetails" roleURI="http://www.mgic.com/role/OtherComprehensiveIncomeLossDetails">
        <link:definition>2411402 - Disclosure - Other Comprehensive Income (Loss) (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="OtherComprehensiveIncomeLossTables" roleURI="http://www.mgic.com/role/OtherComprehensiveIncomeLossTables">
        <link:definition>2311301 - Disclosure - Other Comprehensive Income (Loss) (Tables)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="Reinsurance" roleURI="http://www.mgic.com/role/Reinsurance">
        <link:definition>2110100 - Disclosure - Reinsurance</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="ReinsuranceExcessOfLossReinsuranceDetails" roleURI="http://www.mgic.com/role/ReinsuranceExcessOfLossReinsuranceDetails">
        <link:definition>2410405 - Disclosure - Reinsurance - Excess of Loss Reinsurance (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="ReinsuranceHomeReEntitiesTotalAssetsDetails" roleURI="http://www.mgic.com/role/ReinsuranceHomeReEntitiesTotalAssetsDetails">
        <link:definition>2410406 - Disclosure - Reinsurance - Home Re Entities Total Assets (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="ReinsuranceNarrativeDetails" roleURI="http://www.mgic.com/role/ReinsuranceNarrativeDetails">
        <link:definition>2410403 - Disclosure - Reinsurance - Narrative (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="ReinsuranceQuotaShareReinsuranceDetails" roleURI="http://www.mgic.com/role/ReinsuranceQuotaShareReinsuranceDetails">
        <link:definition>2410404 - Disclosure - Reinsurance - Quota Share Reinsurance (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="ReinsuranceSummaryOfReinsuranceAgreementsDetails" roleURI="http://www.mgic.com/role/ReinsuranceSummaryOfReinsuranceAgreementsDetails">
        <link:definition>2410402 - Disclosure - Reinsurance - Summary of Reinsurance Agreements (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="ReinsuranceTables" roleURI="http://www.mgic.com/role/ReinsuranceTables">
        <link:definition>2310301 - Disclosure - Reinsurance (Tables)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="ScheduleISummaryOfInvestmentsOtherThanInvestmentsInRelatedParties" roleURI="http://www.mgic.com/role/ScheduleISummaryOfInvestmentsOtherThanInvestmentsInRelatedParties">
        <link:definition>2122100 - Schedule - SCHEDULE I - SUMMARY OF INVESTMENTS - OTHER THAN INVESTMENTS IN RELATED PARTIES</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="ScheduleISummaryOfInvestmentsOtherThanInvestmentsInRelatedPartiesDetails" roleURI="http://www.mgic.com/role/ScheduleISummaryOfInvestmentsOtherThanInvestmentsInRelatedPartiesDetails">
        <link:definition>2422401 - Schedule - SCHEDULE I - SUMMARY OF INVESTMENTS - OTHER THAN INVESTMENTS IN RELATED PARTIES (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="ScheduleIiCondensedFinancialInformationOfRegistrant" roleURI="http://www.mgic.com/role/ScheduleIiCondensedFinancialInformationOfRegistrant">
        <link:definition>2123100 - Schedule - SCHEDULE II - CONDENSED FINANCIAL INFORMATION OF REGISTRANT</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="ScheduleIiCondensedFinancialInformationOfRegistrantDetails" roleURI="http://www.mgic.com/role/ScheduleIiCondensedFinancialInformationOfRegistrantDetails">
        <link:definition>2423401 - Schedule - SCHEDULE II - CONDENSED FINANCIAL INFORMATION OF REGISTRANT (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="ScheduleIiCondensedFinancialInformationOfRegistrantSupplementaryNotesDetails" roleURI="http://www.mgic.com/role/ScheduleIiCondensedFinancialInformationOfRegistrantSupplementaryNotesDetails">
        <link:definition>2423402 - Schedule - SCHEDULE II - CONDENSED FINANCIAL INFORMATION OF REGISTRANT - SUPPLEMENTARY NOTES (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="ScheduleIvReinsurance" roleURI="http://www.mgic.com/role/ScheduleIvReinsurance">
        <link:definition>2124100 - Schedule - SCHEDULE IV - REINSURANCE</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="ScheduleIvReinsuranceDetails" roleURI="http://www.mgic.com/role/ScheduleIvReinsuranceDetails">
        <link:definition>2424401 - Schedule - SCHEDULE IV - REINSURANCE (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="ShareBasedCompensationPlans" roleURI="http://www.mgic.com/role/ShareBasedCompensationPlans">
        <link:definition>2118100 - Disclosure - Share-based Compensation Plans</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="ShareBasedCompensationPlansDetails" roleURI="http://www.mgic.com/role/ShareBasedCompensationPlansDetails">
        <link:definition>2418402 - Disclosure - Share-based Compensation Plans (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="ShareBasedCompensationPlansTables" roleURI="http://www.mgic.com/role/ShareBasedCompensationPlansTables">
        <link:definition>2318301 - Disclosure - Share-based Compensation Plans (Tables)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="ShareholdersEquity" roleURI="http://www.mgic.com/role/ShareholdersEquity">
        <link:definition>2114100 - Disclosure - Shareholders' Equity</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="ShareholdersEquityDetails" roleURI="http://www.mgic.com/role/ShareholdersEquityDetails">
        <link:definition>2414401 - Disclosure - Shareholders' Equity (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="SignificantAccountingPolicies" roleURI="http://www.mgic.com/role/SignificantAccountingPolicies">
        <link:definition>2103100 - Disclosure - Significant Accounting Policies</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="SignificantAccountingPoliciesDetails" roleURI="http://www.mgic.com/role/SignificantAccountingPoliciesDetails">
        <link:definition>2403403 - Disclosure - Significant Accounting Policies (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="SignificantAccountingPoliciesPolicies" roleURI="http://www.mgic.com/role/SignificantAccountingPoliciesPolicies">
        <link:definition>2203201 - Disclosure - Significant Accounting Policies (Policies)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="SignificantAccountingPoliciesTables" roleURI="http://www.mgic.com/role/SignificantAccountingPoliciesTables">
        <link:definition>2303302 - Disclosure - Significant Accounting Policies (Tables)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="StatutoryInformation" roleURI="http://www.mgic.com/role/StatutoryInformation">
        <link:definition>2117100 - Disclosure - Statutory Information</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="StatutoryInformationDetails" roleURI="http://www.mgic.com/role/StatutoryInformationDetails">
        <link:definition>2417402 - Disclosure - Statutory Information (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="StatutoryInformationTables" roleURI="http://www.mgic.com/role/StatutoryInformationTables">
        <link:definition>2317301 - Disclosure - Statutory Information (Tables)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="UnauditedQuarterlyFinancialData" roleURI="http://www.mgic.com/role/UnauditedQuarterlyFinancialData">
        <link:definition>2121100 - Disclosure - Unaudited Quarterly Financial Data</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="UnauditedQuarterlyFinancialDataDetails" roleURI="http://www.mgic.com/role/UnauditedQuarterlyFinancialDataDetails">
        <link:definition>2421402 - Disclosure - Unaudited Quarterly Financial Data (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="UnauditedQuarterlyFinancialDataTables" roleURI="http://www.mgic.com/role/UnauditedQuarterlyFinancialDataTables">
        <link:definition>2321301 - Disclosure - Unaudited Quarterly Financial Data (Tables)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
    </xsd:appinfo>
  </xsd:annotation>
  <xsd:element id="mtg_ActualAndEstimatedFutureContributionsAndActualAndEstimatedFutureBenefitPaymentsTableTextBlock" name="ActualAndEstimatedFutureContributionsAndActualAndEstimatedFutureBenefitPaymentsTableTextBlock" nillable="true" substitutionGroup="xbrli:item" type="nonnum:textBlockItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="mtg_AdditionalDisclosuresAbstract" name="AdditionalDisclosuresAbstract" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="mtg_AgingOfPrimaryDefaultInventoryAbstract" name="AgingOfPrimaryDefaultInventoryAbstract" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element id="mtg_AgingOfPrimaryDefaultInventoryTableTextBlock" name="AgingOfPrimaryDefaultInventoryTableTextBlock" nillable="true" substitutionGroup="xbrli:item" type="nonnum:textBlockItemType" xbrli:periodType="duration" />
  <xsd:element id="mtg_AmortizationPeriodExcessofLossReinsuranceCoverage" name="AmortizationPeriodExcessofLossReinsuranceCoverage" nillable="true" substitutionGroup="xbrli:item" type="xbrli:durationItemType" xbrli:periodType="duration" />
  <xsd:element id="mtg_AmountOfPolicyholdersPositionAboveOrBelowRequiredRegulatoryMinimum" name="AmountOfPolicyholdersPositionAboveOrBelowRequiredRegulatoryMinimum" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="instant" />
  <xsd:element id="mtg_AmountOfRequiredMpp" name="AmountOfRequiredMpp" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="instant" />
  <xsd:element id="mtg_AnniversarypaymentreleaseofthestartoftheinterestdeferraltotheAlternativePaymentMechanisminlieuofthefinalmaturityofthedebentures" name="AnniversarypaymentreleaseofthestartoftheinterestdeferraltotheAlternativePaymentMechanisminlieuofthefinalmaturityofthedebentures" nillable="true" substitutionGroup="xbrli:item" type="xbrli:durationItemType" xbrli:periodType="duration" />
  <xsd:element id="mtg_AvailableForSaleSecuritiesDebtMaturitiesWithSingleMaturityDateAmortizedCost" name="AvailableForSaleSecuritiesDebtMaturitiesWithSingleMaturityDateAmortizedCost" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="instant" />
  <xsd:element id="mtg_AvailableForSaleSecuritiesDebtMaturitiesWithSingleMaturityDateFairValue" name="AvailableForSaleSecuritiesDebtMaturitiesWithSingleMaturityDateFairValue" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="instant" />
  <xsd:element id="mtg_AveragePaidClaimsReductionDueToCurtailments" name="AveragePaidClaimsReductionDueToCurtailments" nillable="true" substitutionGroup="xbrli:item" type="num:percentItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="mtg_BondsAndStocksAxis" name="BondsAndStocksAxis" nillable="true" substitutionGroup="xbrldt:dimensionItem" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="mtg_BondsAndStocksDomain" name="BondsAndStocksDomain" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="mtg_CededPremiumsWrittenandEarnedNetofProfitCommission" name="CededPremiumsWrittenandEarnedNetofProfitCommission" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="mtg_CommonSharePurchaseRightsMember" name="CommonSharePurchaseRightsMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="mtg_ContingencyReserve" name="ContingencyReserve" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="instant" />
  <xsd:element abstract="true" id="mtg_ConvertibleJuniorDebenturesat9perannumDue2063Member" name="ConvertibleJuniorDebenturesat9perannumDue2063Member" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="mtg_ConvertibleSeniorNotesDueApril2020Member" name="ConvertibleSeniorNotesDueApril2020Member" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="mtg_CumulativeEffectofAdoptinganAccountingStandardUpdateAxis" name="CumulativeEffectofAdoptinganAccountingStandardUpdateAxis" nillable="true" substitutionGroup="xbrldt:dimensionItem" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="mtg_CumulativeEffectofAdoptinganAccountingStandardUpdateDomain" name="CumulativeEffectofAdoptinganAccountingStandardUpdateDomain" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="mtg_DebtInstrumentConvertibleConversionPrice2" name="DebtInstrumentConvertibleConversionPrice2" nillable="true" substitutionGroup="xbrli:item" type="num:perShareItemType" xbrli:periodType="instant" />
  <xsd:element id="mtg_DebtInstrumentConvertibleNumberOfEquityInstrumentsIfDebtConverted" name="DebtInstrumentConvertibleNumberOfEquityInstrumentsIfDebtConverted" nillable="true" substitutionGroup="xbrli:item" type="xbrli:sharesItemType" xbrli:periodType="duration" />
  <xsd:element id="mtg_DebtInstrumentConvertibleNumberOfEquityInstrumentsReservedForConversion" name="DebtInstrumentConvertibleNumberOfEquityInstrumentsReservedForConversion" nillable="true" substitutionGroup="xbrli:item" type="xbrli:sharesItemType" xbrli:periodType="instant" />
  <xsd:element id="mtg_DebtInstrumentOwnershipPercentageThresholdDeclarationOfDueAndPayable" name="DebtInstrumentOwnershipPercentageThresholdDeclarationOfDueAndPayable" nillable="true" substitutionGroup="xbrli:item" type="num:percentItemType" xbrli:periodType="duration" />
  <xsd:element id="mtg_DeferredTaxAssetsLiabilitiesNetOther" name="DeferredTaxAssetsLiabilitiesNetOther" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="instant" />
  <xsd:element id="mtg_DeferredTaxAssetsLiabilitiesNetOtherComprehensiveIncome" name="DeferredTaxAssetsLiabilitiesNetOtherComprehensiveIncome" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="instant" />
  <xsd:element id="mtg_DeferredTaxAssetsMortgageRelatedInvestments" name="DeferredTaxAssetsMortgageRelatedInvestments" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="instant" />
  <xsd:element id="mtg_DeferredTaxLiabilitiesTaxDeferredExpenseCompensationandBenefitsEmployeeBenefits" name="DeferredTaxLiabilitiesTaxDeferredExpenseCompensationandBenefitsEmployeeBenefits" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="instant" />
  <xsd:element id="mtg_DefinedBenefitPlanActuarialNetGainsLossesDueToAssumptionChanges" name="DefinedBenefitPlanActuarialNetGainsLossesDueToAssumptionChanges" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element id="mtg_DefinedBenefitPlanActuarialNetGainsLossesDueToPlanExperience" name="DefinedBenefitPlanActuarialNetGainsLossesDueToPlanExperience" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element id="mtg_DefinedBenefitPlanBenefitsPaidDirectlyByCompany" name="DefinedBenefitPlanBenefitsPaidDirectlyByCompany" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element id="mtg_DefinedBenefitPlanBenefitsPaidFromFund" name="DefinedBenefitPlanBenefitsPaidFromFund" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element id="mtg_DefinedBenefitPlanBenefitsPaidFromFundLumpSum" name="DefinedBenefitPlanBenefitsPaidFromFundLumpSum" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element id="mtg_DefinedBenefitPlanFutureEarningsPeriodUsedInDeterminingExpectedAverageRateOfEarnings" name="DefinedBenefitPlanFutureEarningsPeriodUsedInDeterminingExpectedAverageRateOfEarnings" nillable="true" substitutionGroup="xbrli:item" type="xbrli:durationItemType" xbrli:periodType="duration" />
  <xsd:element id="mtg_DefinedBenefitPlanMaximuminvestmentininternationalmutualfunds" name="DefinedBenefitPlanMaximuminvestmentininternationalmutualfunds" nillable="true" substitutionGroup="xbrli:item" type="num:percentItemType" xbrli:periodType="duration" />
  <xsd:element id="mtg_DefinedBenefitPlanMinimumValueOfOutstandingNoncallableBondsUsedInHypotheticalCashFlowBondMatchingExercise" name="DefinedBenefitPlanMinimumValueOfOutstandingNoncallableBondsUsedInHypotheticalCashFlowBondMatchingExercise" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="instant" />
  <xsd:element id="mtg_DefinedBenefitPlanNetPeriodicBenefitCostBeforeCostOfSettlementsAndCurtailments" name="DefinedBenefitPlanNetPeriodicBenefitCostBeforeCostOfSettlementsAndCurtailments" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element id="mtg_DefinedBenefitPlanSubtotal" name="DefinedBenefitPlanSubtotal" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element id="mtg_DefinedBenefitPlanTotalAmortization" name="DefinedBenefitPlanTotalAmortization" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element id="mtg_DevelopmentOfFundedStatusTableTextBlock" name="DevelopmentOfFundedStatusTableTextBlock" nillable="true" substitutionGroup="xbrli:item" type="nonnum:textBlockItemType" xbrli:periodType="duration" />
  <xsd:element id="mtg_DirectDomesticPrimaryInsuranceInForce" name="DirectDomesticPrimaryInsuranceInForce" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="instant" />
  <xsd:element id="mtg_DirectDomesticPrimaryRiskInForce" name="DirectDomesticPrimaryRiskInForce" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="instant" />
  <xsd:element id="mtg_DiscretionaryProfitSharingContributionAsPercentageOfParticipantsEligibleCompensation" name="DiscretionaryProfitSharingContributionAsPercentageOfParticipantsEligibleCompensation" nillable="true" substitutionGroup="xbrli:item" type="num:percentItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="mtg_DomesticMutualFundsMember" name="DomesticMutualFundsMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="mtg_EffectOfQuotaShareReinsuranceAgreementsOnPremiumsEarnedAndLossesIncurredTableTextBlock" name="EffectOfQuotaShareReinsuranceAgreementsOnPremiumsEarnedAndLossesIncurredTableTextBlock" nillable="true" substitutionGroup="xbrli:item" type="nonnum:textBlockItemType" xbrli:periodType="duration" />
  <xsd:element id="mtg_EquitySecuritiesTableTextBlock" name="EquitySecuritiesTableTextBlock" nillable="true" substitutionGroup="xbrli:item" type="nonnum:textBlockItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="mtg_ExcessofLossReinsuranceAgreementsHomeReEntitiesMember" name="ExcessofLossReinsuranceAgreementsHomeReEntitiesMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="mtg_ExchangeTradedFundMember" name="ExchangeTradedFundMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="mtg_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetGainLossIncludedInEarningsReportedAsNetRealizedInvestmentGainNet" name="FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetGainLossIncludedInEarningsReportedAsNetRealizedInvestmentGainNet" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="duration" />
  <xsd:element id="mtg_FederalHomeLoanBankAdvancesCollateralMarketValueOfPrincipalPercent" name="FederalHomeLoanBankAdvancesCollateralMarketValueOfPrincipalPercent" nillable="true" substitutionGroup="xbrli:item" type="num:percentItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="mtg_FivePointSevenFivePercentSeniorNotesMember" name="FivePointSevenFivePercentSeniorNotesMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="mtg_ForeignDebtSecuritiesMember" name="ForeignDebtSecuritiesMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="mtg_HomeRe20181Member" name="HomeRe20181Member" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="mtg_HomeRe20191Member" name="HomeRe20191Member" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="mtg_HomeRespecialpurposeinsurersMember" name="HomeRespecialpurposeinsurersMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="mtg_IncreaseDecreaseInEstimatedSeverityPrimaryDefaultsMember" name="IncreaseDecreaseInEstimatedSeverityPrimaryDefaultsMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="mtg_IncreaseDecreaseInExpectedClaimRateMember" name="IncreaseDecreaseInExpectedClaimRateMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="mtg_IncreaseDecreaseInProfitCommissionReceivable" name="IncreaseDecreaseInProfitCommissionReceivable" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="duration" />
  <xsd:element id="mtg_IncreaseDecreaseInReinsuranceRecoverableOnPaidLosses" name="IncreaseDecreaseInReinsuranceRecoverableOnPaidLosses" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="mtg_IncreaseDecreaseRelatedToPoolReservesLaeReservesAndReinsuranceMember" name="IncreaseDecreaseRelatedToPoolReservesLaeReservesAndReinsuranceMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="mtg_InternationalMutualFundsMember" name="InternationalMutualFundsMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="mtg_InvestmentInHoldingCompanyDebt" name="InvestmentInHoldingCompanyDebt" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="instant" />
  <xsd:element id="mtg_InvestmentInSubsidiariesAtEquityInNetAssets" name="InvestmentInSubsidiariesAtEquityInNetAssets" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="instant" />
  <xsd:element id="mtg_LongtermDebtOutstandingPrincipalOfNotesConvertedIntoStock" name="LongtermDebtOutstandingPrincipalOfNotesConvertedIntoStock" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="instant" />
  <xsd:element abstract="true" id="mtg_LossReserveRollForward" name="LossReserveRollForward" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="mtg_LossesIncurredAbstract" name="LossesIncurredAbstract" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="mtg_LossesPaidAbstract" name="LossesPaidAbstract" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element id="mtg_MaximumExposureAssociatedWithOtherDiscussionsLegalProceedings" name="MaximumExposureAssociatedWithOtherDiscussionsLegalProceedings" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="instant" />
  <xsd:element id="mtg_MaximumNumberOfSharesOfCommonStockIssuableUnderAlternativePaymentMechanism" name="MaximumNumberOfSharesOfCommonStockIssuableUnderAlternativePaymentMechanism" nillable="true" substitutionGroup="xbrli:item" type="xbrli:sharesItemType" xbrli:periodType="instant" />
  <xsd:element id="mtg_MaximumNumberOfTradingDays" name="MaximumNumberOfTradingDays" nillable="true" substitutionGroup="xbrli:item" type="xbrli:durationItemType" xbrli:periodType="duration" />
  <xsd:element id="mtg_MaximumPercentageOfAggregatePrincipalAmountOfDebentures" name="MaximumPercentageOfAggregatePrincipalAmountOfDebentures" nillable="true" substitutionGroup="xbrli:item" type="num:percentItemType" xbrli:periodType="instant" />
  <xsd:element id="mtg_MaximumPeriodForWhichInterestPaymentsMayBeDeferredWithoutGivingRiseToEventOfDefault" name="MaximumPeriodForWhichInterestPaymentsMayBeDeferredWithoutGivingRiseToEventOfDefault" nillable="true" substitutionGroup="xbrli:item" type="xbrli:durationItemType" xbrli:periodType="duration" />
  <xsd:element id="mtg_MinimumAndMaximumAllocationRangesForFixedIncomeSecuritiesAndEquitySecuritiesTableTextBlock" name="MinimumAndMaximumAllocationRangesForFixedIncomeSecuritiesAndEquitySecuritiesTableTextBlock" nillable="true" substitutionGroup="xbrli:item" type="nonnum:textBlockItemType" xbrli:periodType="duration" />
  <xsd:element id="mtg_MinimumNumberOfConsecutiveInterestPeriodsForWhichInterestPaymentsMayBeDeferred" name="MinimumNumberOfConsecutiveInterestPeriodsForWhichInterestPaymentsMayBeDeferred" nillable="true" substitutionGroup="xbrli:item" type="xbrli:integerItemType" xbrli:periodType="instant" />
  <xsd:element id="mtg_MinimumNumberOfPaymentsPastDueToBeInDefault" name="MinimumNumberOfPaymentsPastDueToBeInDefault" nillable="true" substitutionGroup="xbrli:item" type="xbrli:integerItemType" xbrli:periodType="duration" />
  <xsd:element id="mtg_MinimumNumberOfTradingDays" name="MinimumNumberOfTradingDays" nillable="true" substitutionGroup="xbrli:item" type="xbrli:durationItemType" xbrli:periodType="duration" />
  <xsd:element id="mtg_MinimumPercentageReturnShouldExceedGrowthInConsumerPriceIndexAnnually" name="MinimumPercentageReturnShouldExceedGrowthInConsumerPriceIndexAnnually" nillable="true" substitutionGroup="xbrli:item" type="num:percentItemType" xbrli:periodType="duration" />
  <xsd:element id="mtg_MinimumPercentagesOfGainLossConsiderForAmortization" name="MinimumPercentagesOfGainLossConsiderForAmortization" nillable="true" substitutionGroup="xbrli:item" type="num:percentItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="mtg_MortgageGuarantyInsuranceCorporationMember" name="MortgageGuarantyInsuranceCorporationMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="mtg_MortgageInsuranceLinkedNotesMember" name="MortgageInsuranceLinkedNotesMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="mtg_NatureOfBusinessAbstract" name="NatureOfBusinessAbstract" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element id="mtg_NetProceedsCap" name="NetProceedsCap" nillable="true" substitutionGroup="xbrli:item" type="num:percentItemType" xbrli:periodType="instant" />
  <xsd:element id="mtg_NetdeferredtaxassetliabilityTableTextBlock" name="NetdeferredtaxassetliabilityTableTextBlock" nillable="true" substitutionGroup="xbrli:item" type="nonnum:textBlockItemType" xbrli:periodType="duration" />
  <xsd:element id="mtg_NumberOfJurisdictionsWithRiskToCapitalRequirements" name="NumberOfJurisdictionsWithRiskToCapitalRequirements" nillable="true" substitutionGroup="xbrli:item" type="xbrli:integerItemType" xbrli:periodType="instant" />
  <xsd:element id="mtg_OperatingLeasesFutureMinimumPaymentsYearFiveandThereafter" name="OperatingLeasesFutureMinimumPaymentsYearFiveandThereafter" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="instant" />
  <xsd:element id="mtg_OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansNetSettlementGainLossArisingDuringPeriodBeforeTax" name="OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansNetSettlementGainLossArisingDuringPeriodBeforeTax" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="duration" />
  <xsd:element id="mtg_OtherInvestedAssetsFairValueDisclosure" name="OtherInvestedAssetsFairValueDisclosure" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="instant" />
  <xsd:element abstract="true" id="mtg_ParentheticalInformationAbstract" name="ParentheticalInformationAbstract" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element id="mtg_PaymentOfOriginalIssueDiscountConvertibleSeniorNotes" name="PaymentOfOriginalIssueDiscountConvertibleSeniorNotes" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="duration" />
  <xsd:element id="mtg_PercentageBackedByUsGovernment" name="PercentageBackedByUsGovernment" nillable="true" substitutionGroup="xbrli:item" type="num:percentItemType" xbrli:periodType="instant" />
  <xsd:element id="mtg_PercentageOfFairValueToAmortizedCostSecuritiesinUnrealizedLossPosition" name="PercentageOfFairValueToAmortizedCostSecuritiesinUnrealizedLossPosition" nillable="true" substitutionGroup="xbrli:item" type="num:percentItemType" xbrli:periodType="instant" />
  <xsd:element id="mtg_PercentageOfNetPremiumsEarnedThatIncurredLossesMustExceedToEnableEarlyWithdrawalsFromContingencyLossReserves" name="PercentageOfNetPremiumsEarnedThatIncurredLossesMustExceedToEnableEarlyWithdrawalsFromContingencyLossReserves" nillable="true" substitutionGroup="xbrli:item" type="num:percentItemType" xbrli:periodType="instant" />
  <xsd:element id="mtg_PercentageOfPremiumsEarnedRequiredToBeMaintainedAsContingencyLossReserves" name="PercentageOfPremiumsEarnedRequiredToBeMaintainedAsContingencyLossReserves" nillable="true" substitutionGroup="xbrli:item" type="num:percentItemType" xbrli:periodType="instant" />
  <xsd:element id="mtg_PercentageOfPriorYearDefaultInventoryResolved" name="PercentageOfPriorYearDefaultInventoryResolved" nillable="true" substitutionGroup="xbrli:item" type="num:percentItemType" xbrli:periodType="duration" />
  <xsd:element id="mtg_PercentageOfStatutoryPolicyholdersSurplusUsedToDetermineMaximumAllowableDividends" name="PercentageOfStatutoryPolicyholdersSurplusUsedToDetermineMaximumAllowableDividends" nillable="true" substitutionGroup="xbrli:item" type="num:percentItemType" xbrli:periodType="instant" />
  <xsd:element id="mtg_PercentofinternationalmutualfundsequityallocationincompaniesprimarilybasedinEuropeandPacificBasin" name="PercentofinternationalmutualfundsequityallocationincompaniesprimarilybasedinEuropeandPacificBasin" nillable="true" substitutionGroup="xbrli:item" type="num:percentItemType" xbrli:periodType="instant" />
  <xsd:element id="mtg_Percentofinternationalmutualfundsequityallocationinemergingmarkets" name="Percentofinternationalmutualfundsequityallocationinemergingmarkets" nillable="true" substitutionGroup="xbrli:item" type="num:percentItemType" xbrli:periodType="instant" />
  <xsd:element id="mtg_PeriodInWhichReasonableCommercialEffortsMustBeginMaximum" name="PeriodInWhichReasonableCommercialEffortsMustBeginMaximum" nillable="true" substitutionGroup="xbrli:item" type="xbrli:durationItemType" xbrli:periodType="duration" />
  <xsd:element id="mtg_PeriodPrecedingElectionToConvert" name="PeriodPrecedingElectionToConvert" nillable="true" substitutionGroup="xbrli:item" type="xbrli:durationItemType" xbrli:periodType="duration" />
  <xsd:element id="mtg_PeriodThatContingencyLossReservesMustBeHeldInYears" name="PeriodThatContingencyLossReservesMustBeHeldInYears" nillable="true" substitutionGroup="xbrli:item" type="xbrli:durationItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="mtg_Plan2015Member" name="Plan2015Member" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="mtg_PoolInsuranceNoticeInventory" name="PoolInsuranceNoticeInventory" nillable="true" substitutionGroup="xbrli:item" type="xbrli:integerItemType" xbrli:periodType="instant" />
  <xsd:element abstract="true" id="mtg_PooledEquityAccountsMember" name="PooledEquityAccountsMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="mtg_PostemploymentBenefitsLiabilityMaximumAgeForQualifiedEmployees" name="PostemploymentBenefitsLiabilityMaximumAgeForQualifiedEmployees" nillable="true" substitutionGroup="xbrli:item" type="xbrli:durationItemType" xbrli:periodType="duration" />
  <xsd:element id="mtg_PremiumDeficiencyReservesPolicyTextBlock" name="PremiumDeficiencyReservesPolicyTextBlock" nillable="true" substitutionGroup="xbrli:item" type="nonnum:textBlockItemType" xbrli:periodType="duration" />
  <xsd:element id="mtg_PremiumRefundLiabilityExpectedClaimPayments" name="PremiumRefundLiabilityExpectedClaimPayments" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="instant" />
  <xsd:element id="mtg_PrimaryDefaultInventory" name="PrimaryDefaultInventory" nillable="true" substitutionGroup="xbrli:item" type="xbrli:integerItemType" xbrli:periodType="instant" />
  <xsd:element id="mtg_PrimaryDefaultInventoryClaimsReceivedInventory" name="PrimaryDefaultInventoryClaimsReceivedInventory" nillable="true" substitutionGroup="xbrli:item" type="xbrli:integerItemType" xbrli:periodType="instant" />
  <xsd:element id="mtg_PrimaryDefaultInventoryCures" name="PrimaryDefaultInventoryCures" nillable="true" substitutionGroup="xbrli:item" type="xbrli:integerItemType" xbrli:periodType="duration" />
  <xsd:element id="mtg_PrimaryDefaultInventoryFourToElevenMonths" name="PrimaryDefaultInventoryFourToElevenMonths" nillable="true" substitutionGroup="xbrli:item" type="xbrli:integerItemType" xbrli:periodType="instant" />
  <xsd:element id="mtg_PrimaryDefaultInventoryFourToElevenMonthsPercentage" name="PrimaryDefaultInventoryFourToElevenMonthsPercentage" nillable="true" substitutionGroup="xbrli:item" type="num:percentItemType" xbrli:periodType="instant" />
  <xsd:element id="mtg_PrimaryDefaultInventoryInFEMAIndividualAssistanceDisasterAreas" name="PrimaryDefaultInventoryInFEMAIndividualAssistanceDisasterAreas" nillable="true" substitutionGroup="xbrli:item" type="xbrli:integerItemType" xbrli:periodType="instant" />
  <xsd:element id="mtg_PrimaryDefaultInventoryNewNotices" name="PrimaryDefaultInventoryNewNotices" nillable="true" substitutionGroup="xbrli:item" type="xbrli:integerItemType" xbrli:periodType="duration" />
  <xsd:element id="mtg_PrimaryDefaultInventoryNewNoticesInFEMAIndividualAssistanceDisasterAreas" name="PrimaryDefaultInventoryNewNoticesInFEMAIndividualAssistanceDisasterAreas" nillable="true" substitutionGroup="xbrli:item" type="xbrli:integerItemType" xbrli:periodType="duration" />
  <xsd:element id="mtg_PrimaryDefaultInventoryOtherItemsRemoved" name="PrimaryDefaultInventoryOtherItemsRemoved" nillable="true" substitutionGroup="xbrli:item" type="xbrli:integerItemType" xbrli:periodType="duration" />
  <xsd:element id="mtg_PrimaryDefaultInventoryPaids" name="PrimaryDefaultInventoryPaids" nillable="true" substitutionGroup="xbrli:item" type="xbrli:integerItemType" xbrli:periodType="duration" />
  <xsd:element id="mtg_PrimaryDefaultInventoryPercentage" name="PrimaryDefaultInventoryPercentage" nillable="true" substitutionGroup="xbrli:item" type="num:percentItemType" xbrli:periodType="instant" />
  <xsd:element id="mtg_PrimaryDefaultInventoryRescissionsAndDenials" name="PrimaryDefaultInventoryRescissionsAndDenials" nillable="true" substitutionGroup="xbrli:item" type="xbrli:integerItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="mtg_PrimaryDefaultInventoryRollForward" name="PrimaryDefaultInventoryRollForward" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element id="mtg_PrimaryDefaultInventoryThreeMonthsOrLess" name="PrimaryDefaultInventoryThreeMonthsOrLess" nillable="true" substitutionGroup="xbrli:item" type="xbrli:integerItemType" xbrli:periodType="instant" />
  <xsd:element id="mtg_PrimaryDefaultInventoryThreeMonthsOrLessPercentage" name="PrimaryDefaultInventoryThreeMonthsOrLessPercentage" nillable="true" substitutionGroup="xbrli:item" type="num:percentItemType" xbrli:periodType="instant" />
  <xsd:element id="mtg_PrimaryDefaultInventoryTwelveMonthsOrMore" name="PrimaryDefaultInventoryTwelveMonthsOrMore" nillable="true" substitutionGroup="xbrli:item" type="xbrli:integerItemType" xbrli:periodType="instant" />
  <xsd:element id="mtg_PrimaryDefaultInventoryTwelveMonthsOrMorePercentOfPrimaryDefaultInventoryInDefaultForTwelveMonthsOrMoreInDefaultForMoreThanThirtySixConsecutiveMonths" name="PrimaryDefaultInventoryTwelveMonthsOrMorePercentOfPrimaryDefaultInventoryInDefaultForTwelveMonthsOrMoreInDefaultForMoreThanThirtySixConsecutiveMonths" nillable="true" substitutionGroup="xbrli:item" type="num:percentItemType" xbrli:periodType="instant" />
  <xsd:element id="mtg_PrimaryDefaultInventoryTwelveMonthsOrMorePercentage" name="PrimaryDefaultInventoryTwelveMonthsOrMorePercentage" nillable="true" substitutionGroup="xbrli:item" type="num:percentItemType" xbrli:periodType="instant" />
  <xsd:element id="mtg_PrincipalAmountOfNotesUsedInDeterminingConversionRate" name="PrincipalAmountOfNotesUsedInDeterminingConversionRate" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="instant" />
  <xsd:element id="mtg_ProceedsFromSaleOfEquitySecurities" name="ProceedsFromSaleOfEquitySecurities" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="mtg_QuotaShareReinsuranceAgreement2015Member" name="QuotaShareReinsuranceAgreement2015Member" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="mtg_QuotaShareReinsuranceAgreement2017Member" name="QuotaShareReinsuranceAgreement2017Member" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="mtg_QuotaShareReinsuranceAgreement2018Member" name="QuotaShareReinsuranceAgreement2018Member" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="mtg_QuotaShareReinsuranceAgreement2019Member" name="QuotaShareReinsuranceAgreement2019Member" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="mtg_QuotaShareReinsuranceAgreement2020Member" name="QuotaShareReinsuranceAgreement2020Member" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="mtg_QuotaShareReinsuranceAgreement2021Member" name="QuotaShareReinsuranceAgreement2021Member" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="mtg_QuotaShareReinsuranceAgreementsExcludingCaptivesMember" name="QuotaShareReinsuranceAgreementsExcludingCaptivesMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="mtg_RealEstateAcquiredMember" name="RealEstateAcquiredMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="mtg_RealEstateAssetsAcquiredFairValueDisclosure" name="RealEstateAssetsAcquiredFairValueDisclosure" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="instant" />
  <xsd:element id="mtg_ReinsuranceCedingCommissionEarned" name="ReinsuranceCedingCommissionEarned" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="duration" />
  <xsd:element id="mtg_ReinsuranceProfitCommission" name="ReinsuranceProfitCommission" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="duration" />
  <xsd:element id="mtg_ReinsuranceQuotaShareReinsuranceAgreementTermsCedingCommissionPercent" name="ReinsuranceQuotaShareReinsuranceAgreementTermsCedingCommissionPercent" nillable="true" substitutionGroup="xbrli:item" type="num:percentItemType" xbrli:periodType="duration" />
  <xsd:element id="mtg_ReinsuranceQuotaShareReinsuranceAgreementTermsCedingRatePercentOptionOne" name="ReinsuranceQuotaShareReinsuranceAgreementTermsCedingRatePercentOptionOne" nillable="true" substitutionGroup="xbrli:item" type="num:percentItemType" xbrli:periodType="duration" />
  <xsd:element id="mtg_ReinsuranceQuotaShareReinsuranceAgreementTermsCedingRatePercentOptionTwo" name="ReinsuranceQuotaShareReinsuranceAgreementTermsCedingRatePercentOptionTwo" nillable="true" substitutionGroup="xbrli:item" type="num:percentItemType" xbrli:periodType="duration" />
  <xsd:element id="mtg_ReinsuranceQuotaShareReinsuranceAgreementTermsContingentTerminationFee" name="ReinsuranceQuotaShareReinsuranceAgreementTermsContingentTerminationFee" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element id="mtg_ReinsuranceQuotaShareReinsuranceAgreementTermsQuotaSharePercent" name="ReinsuranceQuotaShareReinsuranceAgreementTermsQuotaSharePercent" nillable="true" substitutionGroup="xbrli:item" type="num:percentItemType" xbrli:periodType="duration" />
  <xsd:element id="mtg_ReinsuranceQuotaShareReinsuranceAgreementTermsThresholdForPrivateMortgageInsurerEligibilityRequirementsForTerminationElection" name="ReinsuranceQuotaShareReinsuranceAgreementTermsThresholdForPrivateMortgageInsurerEligibilityRequirementsForTerminationElection" nillable="true" substitutionGroup="xbrli:item" type="num:percentItemType" xbrli:periodType="duration" />
  <xsd:element id="mtg_ReinsuranceRetentionPolicyPercentOfTotalTrustAssetsInvestedInCashOrDirectU.S.FederalGovernmentObligations" name="ReinsuranceRetentionPolicyPercentOfTotalTrustAssetsInvestedInCashOrDirectU.S.FederalGovernmentObligations" nillable="true" substitutionGroup="xbrli:item" type="num:percentItemType" xbrli:periodType="duration" />
  <xsd:element id="mtg_ReinsuranceRetentionPolicyRemainingExcessOfLossReinsuranceCoverages" name="ReinsuranceRetentionPolicyRemainingExcessOfLossReinsuranceCoverages" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="instant" />
  <xsd:element id="mtg_ReinsuranceTerminations" name="ReinsuranceTerminations" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="mtg_RestrictedStockAndRestrictedStockUnitsMember" name="RestrictedStockAndRestrictedStockUnitsMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="mtg_RestrictedStockPerformanceShares" name="RestrictedStockPerformanceShares" nillable="true" substitutionGroup="xbrli:item" type="xbrli:sharesItemType" xbrli:periodType="instant" />
  <xsd:element id="mtg_RestrictedStockTimeVestedShares" name="RestrictedStockTimeVestedShares" nillable="true" substitutionGroup="xbrli:item" type="xbrli:sharesItemType" xbrli:periodType="instant" />
  <xsd:element id="mtg_Risktocapitalratioatendofperiod" name="Risktocapitalratioatendofperiod" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element id="mtg_Risktocapitalratioofcombinedinsuranceoperationsincludingreinsuranceaffiliatesatendofperiod" name="Risktocapitalratioofcombinedinsuranceoperationsincludingreinsuranceaffiliatesatendofperiod" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element id="mtg_RollforwardOfPrimaryDefaultInventoryTableTextBlock" name="RollforwardOfPrimaryDefaultInventoryTableTextBlock" nillable="true" substitutionGroup="xbrli:item" type="nonnum:textBlockItemType" xbrli:periodType="duration" />
  <xsd:element id="mtg_ScheduleofInvestmentAllocationStrategiesTableTextBlock" name="ScheduleofInvestmentAllocationStrategiesTableTextBlock" nillable="true" substitutionGroup="xbrli:item" type="nonnum:textBlockItemType" xbrli:periodType="duration" />
  <xsd:element id="mtg_SeniorNotesFairValueDisclosure" name="SeniorNotesFairValueDisclosure" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="instant" />
  <xsd:element abstract="true" id="mtg_SettlementsForClaimsPayingPracticesAndNonperformingLoanSaleMember" name="SettlementsForClaimsPayingPracticesAndNonperformingLoanSaleMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="mtg_SettlementsForCommutationsOfCoveragePoolsOfNonperformingLoansMember" name="SettlementsForCommutationsOfCoveragePoolsOfNonperformingLoansMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="mtg_SpecialDividendPaid" name="SpecialDividendPaid" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element id="mtg_StatutoryAccountingPracticesStatutoryAmountAvailableForDividendPaymentsWithoutRegulatoryApprovalMeasurementMeasurementPeriod" name="StatutoryAccountingPracticesStatutoryAmountAvailableForDividendPaymentsWithoutRegulatoryApprovalMeasurementMeasurementPeriod" nillable="true" substitutionGroup="xbrli:item" type="xbrli:durationItemType" xbrli:periodType="duration" />
  <xsd:element id="mtg_StatutoryAccountingPracticesStatutoryAmountAvailableforDividendPaymentswithoutRegulatoryApprovalMeasurementDividendPaymentPeriod" name="StatutoryAccountingPracticesStatutoryAmountAvailableforDividendPaymentswithoutRegulatoryApprovalMeasurementDividendPaymentPeriod" nillable="true" substitutionGroup="xbrli:item" type="xbrli:durationItemType" xbrli:periodType="duration" />
  <xsd:element id="mtg_StatutoryAccountingPracticesStatutoryNetIncomeAdjustment" name="StatutoryAccountingPracticesStatutoryNetIncomeAdjustment" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element id="mtg_StatutoryAccountingPracticesTextBlock" name="StatutoryAccountingPracticesTextBlock" nillable="true" substitutionGroup="xbrli:item" type="nonnum:textBlockItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="mtg_StatutoryCapitalAbstract" name="StatutoryCapitalAbstract" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="mtg_StatutoryCapitalRequirementsAbstract" name="StatutoryCapitalRequirementsAbstract" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element id="mtg_StatutoryCapitalRequirementsRiskToCapitalRatio" name="StatutoryCapitalRequirementsRiskToCapitalRatio" nillable="true" substitutionGroup="xbrli:item" type="xbrli:pureItemType" xbrli:periodType="instant" />
  <xsd:element id="mtg_StatutoryCapitalRequirementsRiskToCapitalRatioForCombinedInsuranceOperations" name="StatutoryCapitalRequirementsRiskToCapitalRatioForCombinedInsuranceOperations" nillable="true" substitutionGroup="xbrli:item" type="xbrli:pureItemType" xbrli:periodType="instant" />
  <xsd:element id="mtg_StockIssuedDuringPeriodValueTreasuryStockReissuedForShareBasedCompensation" name="StockIssuedDuringPeriodValueTreasuryStockReissuedForShareBasedCompensation" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="mtg_SummaryOfRestrictedStockOrRestrictedStockUnitActivityAbstract" name="SummaryOfRestrictedStockOrRestrictedStockUnitActivityAbstract" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element id="mtg_TaxAndInterestPaymentsForIRSSettlement" name="TaxAndInterestPaymentsForIRSSettlement" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="duration" />
  <xsd:element id="mtg_TaxAndLossBondsHeld" name="TaxAndLossBondsHeld" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="instant" />
  <xsd:element abstract="true" id="mtg_TotalRealizedUnrealizedGainsLossesAbstract" name="TotalRealizedUnrealizedGainsLossesAbstract" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element id="mtg_UnderwritingAndOtherExpensesNet" name="UnderwritingAndOtherExpensesNet" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element id="mtg_UnrecognizedCompensationCostsPerformanceShares" name="UnrecognizedCompensationCostsPerformanceShares" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="instant" />
  <xsd:element id="mtg_UnrecognizedCompensationCostsTimeVestedShares" name="UnrecognizedCompensationCostsTimeVestedShares" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="instant" />
  <xsd:element abstract="true" id="mtg_UnvestedRestrictedStockUnitsMember" name="UnvestedRestrictedStockUnitsMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
</xsd:schema>
