<?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>0000351601</cik>
          <ccc>XXXXXXXX</ccc>
        </issuerCredentials>
      </filer>


      <seriesClassInfo>
        <seriesId>S000001575</seriesId>
        <classId>C000004250</classId>
        <classId>C000004251</classId>
        <classId>C000004253</classId>
        <classId>C000027574</classId>
        <classId>C000137231</classId>
      </seriesClassInfo>


    </filerInfo>
  </headerData>
  <formData>
    <genInfo>
      <regName>RUSSELL INVESTMENT CO</regName>
      <regFileNumber>811-03153</regFileNumber>
      <regCik>0000351601</regCik>
      <regLei>549300J63VJ9OS4TCK93</regLei>
      <regStreet1>401 Union Street</regStreet1>
      <regStreet2>18th Floor</regStreet2>
      <regCity>Seattle</regCity>
      <regStateConditional regCountry="US" regState="US-WA"/>
      <regZipOrPostalCode>98101</regZipOrPostalCode>
      <regPhone>800-787-7354</regPhone>
      <seriesName>Aggressive Strategy Fund</seriesName>
      <seriesId>S000001575</seriesId>
      <seriesLei>IKP5EQ1QZHHH33S96T86</seriesLei>
      <repPdEnd>2025-10-31</repPdEnd>
      <repPdDate>2025-10-31</repPdDate>
      <isFinalFiling>N</isFinalFiling>
    </genInfo>
    <fundInfo>
      <totAssets>617516390.79</totAssets>
      <totLiabs>419879.04</totLiabs>
      <netAssets>617096511.75</netAssets>
      <assetsAttrMiscSec>0.00000000</assetsAttrMiscSec>
      <assetsInvested>0.00000000</assetsInvested>
      <amtPayOneYrBanksBorr>0.00000000</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>0.00000000</cshNotRptdInCorD>
      <isNonCashCollateral>N</isNonCashCollateral>
      <returnInfo>
        <monthlyTotReturns>
          <monthlyTotReturn classId="C000004250" rtn1="2.69000000" rtn2="2.62000000" rtn3="1.08000000"/>
          <monthlyTotReturn classId="C000004251" rtn1="2.61000000" rtn2="2.62000000" rtn3="1.00000000"/>
          <monthlyTotReturn classId="C000004253" rtn1="2.69000000" rtn2="2.69000000" rtn3="1.11000000"/>
          <monthlyTotReturn classId="C000027574" rtn1="2.76000000" rtn2="2.61000000" rtn3="1.12000000"/>
          <monthlyTotReturn classId="C000137231" rtn1="2.70000000" rtn2="2.63000000" rtn3="1.04000000"/>
        </monthlyTotReturns>
        <othMon1 netRealizedGain="806602.85000000" netUnrealizedAppr="15238625.33000000"/>
        <othMon2 netRealizedGain="8126029.09000000" netUnrealizedAppr="7831517.16000000"/>
        <othMon3 netRealizedGain="834723.28000000" netUnrealizedAppr="4926140.25000000"/>
      </returnInfo>
      <mon1Flow redemption="9452373.03000000" reinvestment="0.00000000" sales="3595090.39000000"/>
      <mon2Flow redemption="7461309.37000000" reinvestment="0.00000000" sales="1292398.74000000"/>
      <mon3Flow redemption="8169703.40000000" reinvestment="4328649.78000000" sales="1306365.84000000"/>



    </fundInfo>
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        <name>Global Real Estate Securities Fund</name>
        <lei>12EWS3SG92VUE6HTB591</lei>
        <title>Global Real Estate Securities Fund</title>
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        <identifiers>
          <isin value="US7824787136"/>
        </identifiers>
        <balance>596861.79000000</balance>
        <units>NS</units>
        <curCd>USD</curCd>
        <valUSD>18037163.20000000</valUSD>
        <pctVal>2.922907982229</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>Strategic Bond Fund</name>
        <lei>XI1M1CDVRC8YNT0B5804</lei>
        <title>Strategic Bond Fund</title>
        <cusip>782493159</cusip>
        <identifiers>
          <isin value="US7824931593"/>
        </identifiers>
        <balance>3326356.90000000</balance>
        <units>NS</units>
        <curCd>USD</curCd>
        <valUSD>30535956.31000000</valUSD>
        <pctVal>4.948327486636</pctVal>
        <payoffProfile>Long</payoffProfile>
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        <invCountry>US</invCountry>
        <isRestrictedSec>N</isRestrictedSec>

        <fairValLevel>1</fairValLevel>
        <securityLending>
          <isCashCollateral>N</isCashCollateral>
          <isNonCashCollateral>N</isNonCashCollateral>
          <isLoanByFund>N</isLoanByFund>
        </securityLending>
      </invstOrSec>
      <invstOrSec>
        <name>U.S. Small Cap Equity Fund</name>
        <lei>Z3PZWNK5SYVMTLL03992</lei>
        <title>U.S. Small Cap Equity Fund</title>
        <cusip>782493266</cusip>
        <identifiers>
          <isin value="US7824932666"/>
        </identifiers>
        <balance>686685.14000000</balance>
        <units>NS</units>
        <curCd>USD</curCd>
        <valUSD>18341359.96000000</valUSD>
        <pctVal>2.972202825776</pctVal>
        <payoffProfile>Long</payoffProfile>
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        <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>Opportunistic Credit Fund</name>
        <lei>QMX8CVY41B3G014K7N60</lei>
        <title>Opportunistic Credit Fund</title>
        <cusip>782494181</cusip>
        <identifiers>
          <isin value="US7824941816"/>
        </identifiers>
        <balance>2452919.86000000</balance>
        <units>NS</units>
        <curCd>USD</curCd>
        <valUSD>21512107.15000000</valUSD>
        <pctVal>3.486019891604</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>Global Infrastructure Fund</name>
        <lei>YLLCHFXPBQ1D4DCY1U29</lei>
        <title>Global Infrastructure Fund</title>
        <cusip>782494249</cusip>
        <identifiers>
          <isin value="US7824942491"/>
        </identifiers>
        <balance>1156390.45000000</balance>
        <units>NS</units>
        <curCd>USD</curCd>
        <valUSD>12061152.41000000</valUSD>
        <pctVal>1.954500176284</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>Emerging Markets Fund</name>
        <lei>TUWQFBBWGP866F5SFO52</lei>
        <title>Emerging Markets Fund</title>
        <cusip>782494439</cusip>
        <identifiers>
          <isin value="US7824944398"/>
        </identifiers>
        <balance>1908659.57000000</balance>
        <units>NS</units>
        <curCd>USD</curCd>
        <valUSD>40559015.80000000</valUSD>
        <pctVal>6.572556322669</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>Global Equity Fund</name>
        <lei>VTHOU527SFHXM6LQY641</lei>
        <title>Global Equity Fund</title>
        <cusip>782494447</cusip>
        <identifiers>
          <isin value="US7824944471"/>
        </identifiers>
        <balance>15227092.19000000</balance>
        <units>NS</units>
        <curCd>USD</curCd>
        <valUSD>179831958.81000000</valUSD>
        <pctVal>29.14162621014</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>Multifactor International Equity Fund</name>
        <lei>5493004SX31W5EXJ2590</lei>
        <title>Multifactor International Equity Fund</title>
        <cusip>78249R289</cusip>
        <identifiers>
          <isin value="US78249R2893"/>
        </identifiers>
        <balance>5409362.81000000</balance>
        <units>NS</units>
        <curCd>USD</curCd>
        <valUSD>67562941.46000000</valUSD>
        <pctVal>10.94852104550</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>Multifactor U.S. Equity Fund</name>
        <lei>549300PPT7741EJKD754</lei>
        <title>Multifactor U.S. Equity Fund</title>
        <cusip>78249R347</cusip>
        <identifiers>
          <isin value="US78249R3479"/>
        </identifiers>
        <balance>4443778.43000000</balance>
        <units>NS</units>
        <curCd>USD</curCd>
        <valUSD>77899435.95000000</valUSD>
        <pctVal>12.62354177454</pctVal>
        <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>Long Duration Bond Fund</name>
        <lei>549300VRXC77M7KZRU37</lei>
        <title>Long Duration Bond Fund</title>
        <cusip>78250F398</cusip>
        <identifiers>
          <isin value="US78250F3982"/>
        </identifiers>
        <balance>4534157.53000000</balance>
        <units>NS</units>
        <curCd>USD</curCd>
        <valUSD>36545309.69000000</valUSD>
        <pctVal>5.922138432829</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>Multi-Asset Strategy Fund</name>
        <lei>549300X1VBO22V2H1F97</lei>
        <title>Multi-Asset Strategy Fund</title>
        <cusip>78250F547</cusip>
        <identifiers>
          <isin value="US78250F5474"/>
        </identifiers>
        <balance>4105560.47000000</balance>
        <units>NS</units>
        <curCd>USD</curCd>
        <valUSD>49348836.87000000</valUSD>
        <pctVal>7.996939851442</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>U.S. Strategic Equity Fund</name>
        <lei>BRBLDEE3W4XF96JMJI77</lei>
        <title>U.S. Strategic Equity Fund</title>
        <cusip>78250K611</cusip>
        <identifiers>
          <isin value="US78250K6111"/>
        </identifiers>
        <balance>3492574.44000000</balance>
        <units>NS</units>
        <curCd>USD</curCd>
        <valUSD>65276216.34000000</valUSD>
        <pctVal>10.57795905455</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="The calculation of portfolio-level risk metrics does not look through to the holdings of underlying fixed income funds." noteItem="B.3.a"/>
      <explntrNote note="The calculation of portfolio-level risk metrics does not look through to the holdings of underlying fixed income funds." noteItem="B.3.b"/>
      <explntrNote note="The calculation of portfolio-level risk metrics does not look through to the holdings of underlying fixed income funds." noteItem="B.3.c"/>
      <explntrNote note="Total returns do not reflect the deduction of sales loads and redemption fees" noteItem="B.5.a"/>
    </explntrNotes>
    <signature>
      <ncom:dateSigned>2025-11-17</ncom:dateSigned>
      <ncom:nameOfApplicant>RUSSELL INVESTMENT CO</ncom:nameOfApplicant>
      <ncom:signature>Ross Erickson</ncom:signature>
      <ncom:signerName>Ross Erickson</ncom:signerName>
      <ncom:title>Treasurer, Principal Accounting Officer and Principal Financial Officer</ncom:title>
    </signature>
  </formData>
</edgarSubmission>
