<?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">
  <headerData>
    <submissionType>NPORT-P</submissionType>
    <isConfidential>false</isConfidential>
    <filerInfo>

      <filer>
        <issuerCredentials>
          <cik>0000933691</cik>
          <ccc>XXXXXXXX</ccc>
        </issuerCredentials>
      </filer>


      <seriesClassInfo>
        <seriesId>S000058494</seriesId>
        <classId>C000192071</classId>
        <classId>C000192070</classId>
      </seriesClassInfo>


    </filerInfo>
  </headerData>
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    <genInfo>
      <regName>JNL Series Trust</regName>
      <regFileNumber>811-8894</regFileNumber>
      <regCik>0000933691</regCik>
      <regLei>549300T5WIPN6IWM0D45</regLei>
      <regStreet1>1 Corporate Way</regStreet1>
      <regCity>Lansing</regCity>
      <regStateConditional regCountry="US" regState="US-MI"/>
      <regZipOrPostalCode>48951</regZipOrPostalCode>
      <regPhone>517-367-4336</regPhone>
      <seriesName>JNL/Vanguard International Fund</seriesName>
      <seriesId>S000058494</seriesId>
      <seriesLei>5493008RPA77YVGF1R55</seriesLei>
      <repPdEnd>2020-12-31</repPdEnd>
      <repPdDate>2020-03-31</repPdDate>
      <isFinalFiling>N</isFinalFiling>
    </genInfo>
    <fundInfo>
      <totAssets>532425345.800000000000</totAssets>
      <totLiabs>2072120.860000000000</totLiabs>
      <netAssets>530353224.940000000000</netAssets>
      <assetsAttrMiscSec>0.000000000000</assetsAttrMiscSec>
      <assetsInvested>0.000000000000</assetsInvested>
      <amtPayOneYrBanksBorr>0.000000000000</amtPayOneYrBanksBorr>
      <amtPayOneYrCtrldComp>0.000000000000</amtPayOneYrCtrldComp>
      <amtPayOneYrOthAffil>0.000000000000</amtPayOneYrOthAffil>
      <amtPayOneYrOther>0.000000000000</amtPayOneYrOther>
      <amtPayAftOneYrBanksBorr>0.000000000000</amtPayAftOneYrBanksBorr>
      <amtPayAftOneYrCtrldComp>0.000000000000</amtPayAftOneYrCtrldComp>
      <amtPayAftOneYrOthAffil>0.000000000000</amtPayAftOneYrOthAffil>
      <amtPayAftOneYrOther>0.000000000000</amtPayAftOneYrOther>
      <delayDeliv>0.000000000000</delayDeliv>
      <standByCommit>0.000000000000</standByCommit>
      <liquidPref>0.000000000000</liquidPref>
      <cshNotRptdInCorD>0.000000000000</cshNotRptdInCorD>
      <isNonCashCollateral>N</isNonCashCollateral>
      <returnInfo>
        <monthlyTotReturns>
          <monthlyTotReturn classId="C000192070" rtn1="-1.62" rtn2="-4.08" rtn3="-11.21"/>
          <monthlyTotReturn classId="C000192071" rtn1="-1.53" rtn2="-4.13" rtn3="-11.14"/>
        </monthlyTotReturns>
        <monthlyReturnCats>
          <commodityContracts>
            <mon1 netRealizedGain="N/A" netUnrealizedAppr="N/A"/>
            <mon2 netRealizedGain="N/A" netUnrealizedAppr="N/A"/>
            <mon3 netRealizedGain="N/A" netUnrealizedAppr="N/A"/>
            <futureCategory>
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          </commodityContracts>
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              <instrMon3 netRealizedGain="N/A" netUnrealizedAppr="N/A"/>
            </swaptionCategory>
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              <instrMon3 netRealizedGain="N/A" netUnrealizedAppr="N/A"/>
            </swapCategory>
          </creditContracts>
          <equityContracts>
            <mon1 netRealizedGain="N/A" netUnrealizedAppr="N/A"/>
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            <futureCategory>
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            </swapCategory>
          </equityContracts>
          <foreignExchgContracts>
            <mon1 netRealizedGain="N/A" netUnrealizedAppr="N/A"/>
            <mon2 netRealizedGain="N/A" netUnrealizedAppr="N/A"/>
            <mon3 netRealizedGain="N/A" netUnrealizedAppr="N/A"/>
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          </foreignExchgContracts>
          <interestRtContracts>
            <mon1 netRealizedGain="N/A" netUnrealizedAppr="N/A"/>
            <mon2 netRealizedGain="N/A" netUnrealizedAppr="N/A"/>
            <mon3 netRealizedGain="N/A" netUnrealizedAppr="N/A"/>
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              <instrMon1 netRealizedGain="N/A" netUnrealizedAppr="N/A"/>
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            </forwardCategory>
            <futureCategory>
              <instrMon1 netRealizedGain="N/A" netUnrealizedAppr="N/A"/>
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              <instrMon3 netRealizedGain="N/A" netUnrealizedAppr="N/A"/>
            </futureCategory>
            <optionCategory>
              <instrMon1 netRealizedGain="N/A" netUnrealizedAppr="N/A"/>
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              <instrMon1 netRealizedGain="N/A" netUnrealizedAppr="N/A"/>
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            </swaptionCategory>
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              <instrMon1 netRealizedGain="N/A" netUnrealizedAppr="N/A"/>
              <instrMon2 netRealizedGain="N/A" netUnrealizedAppr="N/A"/>
              <instrMon3 netRealizedGain="N/A" netUnrealizedAppr="N/A"/>
            </swapCategory>
          </interestRtContracts>
        </monthlyReturnCats>
        <othMon1 netRealizedGain="24495.780000000000" netUnrealizedAppr="-10582926.64"/>
        <othMon2 netRealizedGain="-6831.120000000000" netUnrealizedAppr="-27069850.07"/>
        <othMon3 netRealizedGain="-6571732.740000000000" netUnrealizedAppr="-88911736.29"/>
      </returnInfo>
      <mon1Flow redemption="12667871.12" reinvestment="0" sales="22451899.41"/>
      <mon2Flow redemption="20332827.08" reinvestment="0" sales="21375711.12"/>
      <mon3Flow redemption="42492849.94" reinvestment="0" sales="15528474.56"/>


    </fundInfo>
    <invstOrSecs>
      <invstOrSec>
        <name>Vanguard Variable Insurance Fund - International Portfolio</name>
        <lei>N/A</lei>
        <title>Vanguard Variable Insurance Fund - International Portfolio</title>
        <cusip>921925707</cusip>
        <identifiers>
          <isin value="US9219257071"/>
          <ticker value="VVAINTV"/>
          <other otherDesc="INTERNAL" value="921925707"/>
        </identifiers>
        <balance>22912760.97</balance>
        <units>NS</units>
        <curCd>USD</curCd>
        <valUSD>531805182.1</valUSD>
        <pctVal>100.2737717226</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>
    <signature>
      <ncom:dateSigned>2020-05-28</ncom:dateSigned>
      <ncom:nameOfApplicant>JNL Series Trust</ncom:nameOfApplicant>
      <ncom:signature>Daniel W. Koors</ncom:signature>
      <ncom:signerName>Daniel W. Koors</ncom:signerName>
      <ncom:title>Principal Financial Officer</ncom:title>
    </signature>
  </formData>
  <documents>XXXX</documents>
</edgarSubmission>
