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    <submissionType>NPORT-P</submissionType>
    <isConfidential>false</isConfidential>
    <filerInfo>

      <filer>
        <issuerCredentials>
          <cik>0000892538</cik>
          <ccc>XXXXXXXX</ccc>
        </issuerCredentials>
      </filer>


      <seriesClassInfo>
        <seriesId>S000056260</seriesId>
        <classId>C000177078</classId>
        <classId>C000177077</classId>
      </seriesClassInfo>


    </filerInfo>
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      <regName>SUNAMERICA SERIES TRUST</regName>
      <regFileNumber>811-07238</regFileNumber>
      <regCik>0000892538</regCik>
      <regLei>549300YDIAXUNCUXFM44</regLei>
      <regStreet1>21650 Oxnard Street, 10 Floor</regStreet1>
      <regCity>Woodland Hills</regCity>
      <regStateConditional regCountry="US" regState="US-CA"/>
      <regZipOrPostalCode>91367</regZipOrPostalCode>
      <regPhone>800-445-7862</regPhone>
      <seriesName>SA Index Allocation 60/40 Portfolio</seriesName>
      <seriesId>S000056260</seriesId>
      <seriesLei>549300HHNWD2HFKS0705</seriesLei>
      <repPdEnd>2020-01-31</repPdEnd>
      <repPdDate>2020-01-31</repPdDate>
      <isFinalFiling>N</isFinalFiling>
    </genInfo>
    <fundInfo>
      <totAssets>144081768.07</totAssets>
      <totLiabs>108904.77</totLiabs>
      <netAssets>143972863.3</netAssets>
      <assetsAttrMiscSec>0</assetsAttrMiscSec>
      <assetsInvested>0</assetsInvested>
      <amtPayOneYrBanksBorr>0</amtPayOneYrBanksBorr>
      <amtPayOneYrCtrldComp>0</amtPayOneYrCtrldComp>
      <amtPayOneYrOthAffil>0</amtPayOneYrOthAffil>
      <amtPayOneYrOther>0</amtPayOneYrOther>
      <amtPayAftOneYrBanksBorr>0</amtPayAftOneYrBanksBorr>
      <amtPayAftOneYrCtrldComp>0</amtPayAftOneYrCtrldComp>
      <amtPayAftOneYrOthAffil>0</amtPayAftOneYrOthAffil>
      <amtPayAftOneYrOther>0</amtPayAftOneYrOther>
      <delayDeliv>0</delayDeliv>
      <standByCommit>0</standByCommit>
      <liquidPref>0</liquidPref>
      <cshNotRptdInCorD>0</cshNotRptdInCorD>
      <isNonCashCollateral>N</isNonCashCollateral>
      <returnInfo>
        <monthlyTotReturns>
          <monthlyTotReturn classId="C000177077" rtn1="1.76000000" rtn2="1.71000000" rtn3="0.17000000"/>
          <monthlyTotReturn classId="C000177078" rtn1="1.76000000" rtn2="1.79000000" rtn3="0.17000000"/>
        </monthlyTotReturns>
        <othMon1 netRealizedGain="298248.57000000" netUnrealizedAppr="1805624.13000000"/>
        <othMon2 netRealizedGain="175681.36000000" netUnrealizedAppr="2213253.74000000"/>
        <othMon3 netRealizedGain="410165.40000000" netUnrealizedAppr="-145844.55000000"/>
      </returnInfo>
      <mon1Flow redemption="893689.98000000" reinvestment="828997.00000000" sales="3282199.36000000"/>
      <mon2Flow redemption="107732.99000000" reinvestment="124527.00000000" sales="4786921.78000000"/>
      <mon3Flow redemption="1122082.42000000" reinvestment="0.00000000" sales="4094914.87000000"/>


    </fundInfo>
    <invstOrSecs>
      <invstOrSec>
        <name>SA LARGE CAP INDEX PORT</name>
        <lei>5493001KG7IB71632F87</lei>
        <title>SA LARGE CAP INDEX PORT</title>
        <cusip>000000000</cusip>
        <identifiers>
          <other otherDesc="Internal Identifier" value="971SAV906"/>
        </identifiers>
        <balance>2275755.98000000</balance>
        <units>NS</units>
        <curCd>USD</curCd>
        <valUSD>59374473.52000000</valUSD>
        <pctVal>41.24004493560</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>SA FIXED INCOME INDEX</name>
        <lei>5493007IX45QAU60EP05</lei>
        <title>SA FIXED INCOME INDEX</title>
        <cusip>000000000</cusip>
        <identifiers>
          <other otherDesc="Internal Identifier" value="928MCK905"/>
        </identifiers>
        <balance>3420820.55300000</balance>
        <units>NS</units>
        <curCd>USD</curCd>
        <valUSD>37594817.88000000</valUSD>
        <pctVal>26.11243328658</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>SA INTERNATIONAL INDEX</name>
        <lei>549300FTUB0BLWLXGM68</lei>
        <title>SA INTERNATIONAL INDEX</title>
        <cusip>000000000</cusip>
        <identifiers>
          <other otherDesc="Internal Identifier" value="928MCJ908"/>
        </identifiers>
        <balance>1165717.01500000</balance>
        <units>NS</units>
        <curCd>USD</curCd>
        <valUSD>13300831.14000000</valUSD>
        <pctVal>9.238429267246</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>SA MID CAP INDEX</name>
        <lei>5493005POLD4G0MMFG86</lei>
        <title>SA MID CAP INDEX</title>
        <cusip>000000000</cusip>
        <identifiers>
          <other otherDesc="Internal Identifier" value="928MCG904"/>
        </identifiers>
        <balance>609383.52300000</balance>
        <units>NS</units>
        <curCd>USD</curCd>
        <valUSD>7056661.20000000</valUSD>
        <pctVal>4.901382828857</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>SA FIXD INC INTERMED INDEX</name>
        <lei>5493003LM62IPNOXE128</lei>
        <title>SA FIXD INC INTERMED INDEX</title>
        <cusip>000000000</cusip>
        <identifiers>
          <other otherDesc="Internal Identifier" value="932JFX905"/>
        </identifiers>
        <balance>1938898.77900000</balance>
        <units>NS</units>
        <curCd>USD</curCd>
        <valUSD>20377826.17000000</valUSD>
        <pctVal>14.15393547292</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>SA SMALL CAP INDEX</name>
        <lei>549300NLVGJYYLB24614</lei>
        <title>SA SMALL CAP INDEX</title>
        <cusip>000000000</cusip>
        <identifiers>
          <other otherDesc="Internal Identifier" value="928MCH902"/>
        </identifiers>
        <balance>551702.35900000</balance>
        <units>NS</units>
        <curCd>USD</curCd>
        <valUSD>6366645.22000000</valUSD>
        <pctVal>4.422114747230</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>2020-02-27</ncom:dateSigned>
      <ncom:nameOfApplicant>SUNAMERICA SERIES TRUST</ncom:nameOfApplicant>
      <ncom:signature>Shawn Parry</ncom:signature>
      <ncom:signerName>Shawn Parry</ncom:signerName>
      <ncom:title>Assistant Treasurer</ncom:title>
    </signature>
  </formData>
</edgarSubmission>
