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    <isConfidential>false</isConfidential>
    <filerInfo>

      <filer>
        <issuerCredentials>
          <cik>0000861929</cik>
          <ccc>XXXXXXXX</ccc>
        </issuerCredentials>
      </filer>


      <seriesClassInfo>
        <seriesId>S000001016</seriesId>
        <classId>C000002768</classId>
      </seriesClassInfo>


    </filerInfo>
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      <regName>DIMENSIONAL INVESTMENT GROUP INC</regName>
      <regFileNumber>811-06067</regFileNumber>
      <regCik>0000861929</regCik>
      <regLei>549300HU43AV2FC6L876</regLei>
      <regStreet1>6300 BEE CAVE ROAD</regStreet1>
      <regStreet2>BUILDING ONE</regStreet2>
      <regCity>AUSTIN</regCity>
      <regStateConditional regCountry="US" regState="US-TX"/>
      <regZipOrPostalCode>78746</regZipOrPostalCode>
      <regPhone>512-306-7400</regPhone>
      <seriesName>GLOBAL EQUITY PORTFOLIO</seriesName>
      <seriesId>S000001016</seriesId>
      <seriesLei>549300S5IGMYQUP4YD65</seriesLei>
      <repPdEnd>2024-10-31</repPdEnd>
      <repPdDate>2024-10-31</repPdDate>
      <isFinalFiling>N</isFinalFiling>
    </genInfo>
    <fundInfo>
      <totAssets>9269531301.47</totAssets>
      <totLiabs>1092537.88</totLiabs>
      <netAssets>9268438763.59</netAssets>
      <assetsAttrMiscSec>0.00000000</assetsAttrMiscSec>
      <assetsInvested>0.00000000</assetsInvested>
      <amtPayOneYrBanksBorr>528500.00000000</amtPayOneYrBanksBorr>
      <amtPayOneYrCtrldComp>0.00000000</amtPayOneYrCtrldComp>
      <amtPayOneYrOthAffil>0.00000000</amtPayOneYrOthAffil>
      <amtPayOneYrOther>0.00000000</amtPayOneYrOther>
      <amtPayAftOneYrBanksBorr>0.00000000</amtPayAftOneYrBanksBorr>
      <amtPayAftOneYrCtrldComp>0.00000000</amtPayAftOneYrCtrldComp>
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      <amtPayAftOneYrOther>0.00000000</amtPayAftOneYrOther>
      <delayDeliv>0.00000000</delayDeliv>
      <standByCommit>0.00000000</standByCommit>
      <liquidPref>0.00000000</liquidPref>
      <cshNotRptdInCorD>95.99000000</cshNotRptdInCorD>
      <isNonCashCollateral>N</isNonCashCollateral>
      <returnInfo>
        <monthlyTotReturns>
          <monthlyTotReturn classId="C000002768" rtn1="1.78000000" rtn2="1.86000000" rtn3="-1.95000000"/>
        </monthlyTotReturns>
        <othMon1 netRealizedGain="26483547.41000000" netUnrealizedAppr="136603235.92000000"/>
        <othMon2 netRealizedGain="10973898.30000000" netUnrealizedAppr="121528147.92000000"/>
        <othMon3 netRealizedGain="12076898.58000000" netUnrealizedAppr="-197331729.90000000"/>
      </returnInfo>
      <mon1Flow redemption="113714225.54000000" reinvestment="0.00000000" sales="54653324.21000000"/>
      <mon2Flow redemption="127661124.63000000" reinvestment="38919710.83000000" sales="95472942.95000000"/>
      <mon3Flow redemption="102154782.45000000" reinvestment="0.00000000" sales="48446059.85000000"/>


    </fundInfo>
    <invstOrSecs>
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        <name>DFA US Core Equity 2 Portfolio</name>
        <lei>549300ADSTXJ0S61X417</lei>
        <title>DFA U.S. Core Equity 2 Portfolio</title>
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        <identifiers>
          <isin value="US2332033974"/>
        </identifiers>
        <balance>131836169.99000000</balance>
        <units>NS</units>
        <curCd>USD</curCd>
        <valUSD>5007137736.30000000</valUSD>
        <pctVal>54.02352935609</pctVal>
        <payoffProfile>Long</payoffProfile>
        <assetCat>EC</assetCat>
        <issuerCat>RF</issuerCat>
        <invCountry>US</invCountry>
        <isRestrictedSec>N</isRestrictedSec>

        <fairValLevel>1</fairValLevel>
        <securityLending>
          <isCashCollateral>N</isCashCollateral>
          <isNonCashCollateral>N</isNonCashCollateral>
          <isLoanByFund>N</isLoanByFund>
        </securityLending>
      </invstOrSec>
      <invstOrSec>
        <name>DFA International Real Estate Securities</name>
        <lei>549300CPCX0MJ9G37864</lei>
        <title>DFA International Real Estate Securities</title>
        <cusip>233203348</cusip>
        <identifiers>
          <isin value="US2332033487"/>
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        <balance>13008164.34000000</balance>
        <units>NS</units>
        <curCd>USD</curCd>
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        <payoffProfile>Long</payoffProfile>
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        <fairValLevel>1</fairValLevel>
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          <isCashCollateral>N</isCashCollateral>
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      </invstOrSec>
      <invstOrSec>
        <name>DFA Real Estate Securities Portfolio</name>
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        <units>NS</units>
        <curCd>USD</curCd>
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        <payoffProfile>Long</payoffProfile>
        <assetCat>EC</assetCat>
        <issuerCat>RF</issuerCat>
        <invCountry>US</invCountry>
        <isRestrictedSec>N</isRestrictedSec>

        <fairValLevel>1</fairValLevel>
        <securityLending>
          <isCashCollateral>N</isCashCollateral>
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          <isLoanByFund>N</isLoanByFund>
        </securityLending>
      </invstOrSec>
      <invstOrSec>
        <name>DFA International Core Equity Portfolio</name>
        <lei>5493006PNAH8EX4MI695</lei>
        <title>DFA International Core Equity Portfolio</title>
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          <isin value="US2332033719"/>
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        <balance>103704257.35000000</balance>
        <units>NS</units>
        <curCd>USD</curCd>
        <valUSD>1654082904.80000000</valUSD>
        <pctVal>17.84640268971</pctVal>
        <payoffProfile>Long</payoffProfile>
        <assetCat>EC</assetCat>
        <issuerCat>RF</issuerCat>
        <invCountry>US</invCountry>
        <isRestrictedSec>N</isRestrictedSec>

        <fairValLevel>1</fairValLevel>
        <securityLending>
          <isCashCollateral>N</isCashCollateral>
          <isNonCashCollateral>N</isNonCashCollateral>
          <isLoanByFund>N</isLoanByFund>
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      </invstOrSec>
      <invstOrSec>
        <name>DFA US Core Equity 1 Portfolio</name>
        <lei>549300HFCYX77UDJN369</lei>
        <title>DFA U.S. Core Equity 1 Portfolio</title>
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        <identifiers>
          <isin value="US2332034139"/>
        </identifiers>
        <balance>39326271.61000000</balance>
        <units>NS</units>
        <curCd>USD</curCd>
        <valUSD>1668613704.24000000</valUSD>
        <pctVal>18.00317989686</pctVal>
        <payoffProfile>Long</payoffProfile>
        <assetCat>EC</assetCat>
        <issuerCat>RF</issuerCat>
        <invCountry>US</invCountry>
        <isRestrictedSec>N</isRestrictedSec>

        <fairValLevel>1</fairValLevel>
        <securityLending>
          <isCashCollateral>N</isCashCollateral>
          <isNonCashCollateral>N</isNonCashCollateral>
          <isLoanByFund>N</isLoanByFund>
        </securityLending>
      </invstOrSec>
      <invstOrSec>
        <name>DFA Emerging Markets Core Equity Portfolio</name>
        <lei>549300JF8HO6EL9ROR31</lei>
        <title>DFA Emerging Markets Core Equity Portfolio</title>
        <cusip>233203421</cusip>
        <identifiers>
          <isin value="US2332034212"/>
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        <balance>30558215.78000000</balance>
        <units>NS</units>
        <curCd>USD</curCd>
        <valUSD>742870225.64000000</valUSD>
        <pctVal>8.015052422402</pctVal>
        <payoffProfile>Long</payoffProfile>
        <assetCat>EC</assetCat>
        <issuerCat>RF</issuerCat>
        <invCountry>US</invCountry>
        <isRestrictedSec>N</isRestrictedSec>

        <fairValLevel>1</fairValLevel>
        <securityLending>
          <isCashCollateral>N</isCashCollateral>
          <isNonCashCollateral>N</isNonCashCollateral>
          <isLoanByFund>N</isLoanByFund>
        </securityLending>
      </invstOrSec>
    </invstOrSecs>
    <explntrNotes>
      <explntrNote note="Monthly returns presented in Item B.5(a) have been calculated without deducting any applicable sales loads or redemption fees." noteItem="B.5.a"/>
    </explntrNotes>
    <signature>
      <ncom:dateSigned>2024-11-15</ncom:dateSigned>
      <ncom:nameOfApplicant>DIMENSIONAL INVESTMENT GROUP INC</ncom:nameOfApplicant>
      <ncom:signature>Randy Olson</ncom:signature>
      <ncom:signerName>Randy Olson</ncom:signerName>
      <ncom:title>Vice President</ncom:title>
    </signature>
  </formData>
</edgarSubmission>
