<?xml version="1.0" encoding="UTF-8"?><edgarSubmission xmlns="http://www.sec.gov/edgar/nport" xmlns:com="http://www.sec.gov/edgar/common" xmlns:ncom="http://www.sec.gov/edgar/nportcommon" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.sec.gov/edgar/nport eis_NPORT_Filer.xsd">
  <headerData>
    <submissionType>NPORT-P</submissionType>
    <isConfidential>false</isConfidential>
    <filerInfo>

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


      <seriesClassInfo>
        <seriesId>S000001016</seriesId>
        <classId>C000002767</classId>
        <classId>C000002768</classId>
      </seriesClassInfo>


    </filerInfo>
  </headerData>
  <formData>
    <genInfo>
      <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>2020-10-31</repPdEnd>
      <repPdDate>2020-04-30</repPdDate>
      <isFinalFiling>N</isFinalFiling>
    </genInfo>
    <fundInfo>
      <totAssets>6511188177.18</totAssets>
      <totLiabs>7576668.60</totLiabs>
      <netAssets>6503611508.58</netAssets>
      <assetsAttrMiscSec>0.00000000</assetsAttrMiscSec>
      <assetsInvested>0.00000000</assetsInvested>
      <amtPayOneYrBanksBorr>7111500.00000000</amtPayOneYrBanksBorr>
      <amtPayOneYrCtrldComp>0.00000000</amtPayOneYrCtrldComp>
      <amtPayOneYrOthAffil>0.00000000</amtPayOneYrOthAffil>
      <amtPayOneYrOther>0.00000000</amtPayOneYrOther>
      <amtPayAftOneYrBanksBorr>0.00000000</amtPayAftOneYrBanksBorr>
      <amtPayAftOneYrCtrldComp>0.00000000</amtPayAftOneYrCtrldComp>
      <amtPayAftOneYrOthAffil>0.00000000</amtPayAftOneYrOthAffil>
      <amtPayAftOneYrOther>0.00000000</amtPayAftOneYrOther>
      <delayDeliv>0.00000000</delayDeliv>
      <standByCommit>0.00000000</standByCommit>
      <liquidPref>0.00000000</liquidPref>
      <cshNotRptdInCorD>56.13000000</cshNotRptdInCorD>
      <isNonCashCollateral>N</isNonCashCollateral>
      <returnInfo>
        <monthlyTotReturns>
          <monthlyTotReturn classId="C000002768" rtn1="-8.53000000" rtn2="-16.97000000" rtn3="12.32000000"/>
          <monthlyTotReturn classId="C000002767" rtn1="-8.56000000" rtn2="-17.00000000" rtn3="12.29000000"/>
        </monthlyTotReturns>
        <othMon1 netRealizedGain="-105821.29000000" netUnrealizedAppr="-661064673.46000000"/>
        <othMon2 netRealizedGain="-3728407.10000000" netUnrealizedAppr="-1224626132.36000000"/>
        <othMon3 netRealizedGain="-21095007.91000000" netUnrealizedAppr="740927493.16000000"/>
      </returnInfo>
      <mon1Flow redemption="115307618.48000000" reinvestment="0.00000000" sales="110357734.86000000"/>
      <mon2Flow redemption="419778332.03000000" reinvestment="23444234.23000000" sales="412649387.01000000"/>
      <mon3Flow redemption="268916379.67000000" reinvestment="0.00000000" sales="180717980.26000000"/>


    </fundInfo>
    <invstOrSecs>
      <invstOrSec>
        <name>DFA US Core Equity 2 Portfolio</name>
        <lei>549300ADSTXJ0S61X417</lei>
        <title>DFA US Core Equity 2 Portfolio</title>
        <cusip>233203397</cusip>
        <identifiers>
          <isin value="US2332033974"/>
        </identifiers>
        <balance>172469846.98800000</balance>
        <units>NS</units>
        <curCd>USD</curCd>
        <valUSD>3440773447.41000000</valUSD>
        <pctVal>52.90558088949</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 Core Equity Portfolio</name>
        <lei>5493006PNAH8EX4MI695</lei>
        <title>DFA International Core Equity Portfolio</title>
        <cusip>233203371</cusip>
        <identifiers>
          <isin value="US2332033719"/>
        </identifiers>
        <balance>117621966.65300000</balance>
        <units>NS</units>
        <curCd>USD</curCd>
        <valUSD>1277374557.85000000</valUSD>
        <pctVal>19.64100340502</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"/>
        </identifiers>
        <balance>27290482.43600000</balance>
        <units>NS</units>
        <curCd>USD</curCd>
        <valUSD>471033726.85000000</valUSD>
        <pctVal>7.242648584230</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 US Core Equity 1 Portfolio</name>
        <lei>549300HFCYX77UDJN369</lei>
        <title>DFA US Core Equity 1 Portfolio</title>
        <cusip>233203413</cusip>
        <identifiers>
          <isin value="US2332034139"/>
        </identifiers>
        <balance>51845571.85800000</balance>
        <units>NS</units>
        <curCd>USD</curCd>
        <valUSD>1148897872.37000000</valUSD>
        <pctVal>17.66553661537</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 Real Estate Securities Portfolio</name>
        <lei>5493005AU0YD5OZ5Q074</lei>
        <title>DFA Real Estate Securities Portfolio</title>
        <cusip>233203835</cusip>
        <identifiers>
          <isin value="US2332038353"/>
        </identifiers>
        <balance>5075355.11400000</balance>
        <units>NS</units>
        <curCd>USD</curCd>
        <valUSD>173018855.84000000</valUSD>
        <pctVal>2.660350416253</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>2020-05-20</ncom:dateSigned>
      <ncom:nameOfApplicant>DIMENSIONAL INVESTMENT GROUP INC</ncom:nameOfApplicant>
      <ncom:signature>Christopher Crossan</ncom:signature>
      <ncom:signerName>Christopher Crossan</ncom:signerName>
      <ncom:title>Vice President</ncom:title>
    </signature>
  </formData>
</edgarSubmission>
