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    <isConfidential>false</isConfidential>
    <filerInfo>

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


      <seriesClassInfo>
        <seriesId>S000001578</seriesId>
        <classId>C000004266</classId>
        <classId>C000004268</classId>
        <classId>C000004265</classId>
        <classId>C000137237</classId>
        <classId>C000027580</classId>
      </seriesClassInfo>


    </filerInfo>
  </headerData>
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      <regName>RUSSELL INVESTMENT CO</regName>
      <regFileNumber>811-03153</regFileNumber>
      <regCik>0000351601</regCik>
      <regLei>549300J63VJ9OS4TCK93</regLei>
      <regStreet1>1301 SECOND AVENUE</regStreet1>
      <regStreet2>18TH FLOOR</regStreet2>
      <regCity>SEATTLE</regCity>
      <regStateConditional regCountry="US" regState="US-WA"/>
      <regZipOrPostalCode>98101</regZipOrPostalCode>
      <regPhone>800-787-7354</regPhone>
      <seriesName>Conservative Strategy Fund</seriesName>
      <seriesId>S000001578</seriesId>
      <seriesLei>D7FRTMXY2CS76ECVES28</seriesLei>
      <repPdEnd>2025-10-31</repPdEnd>
      <repPdDate>2025-04-30</repPdDate>
      <isFinalFiling>N</isFinalFiling>
    </genInfo>
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      <totAssets>63087287.88</totAssets>
      <totLiabs>62769.67</totLiabs>
      <netAssets>63024518.21</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>
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          <monthlyTotReturn classId="C000004268" rtn1="1.57000000" rtn2="-0.89000000" rtn3="0.23000000"/>
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        <othMon2 netRealizedGain="-331080.36000000" netUnrealizedAppr="-363371.63000000"/>
        <othMon3 netRealizedGain="-140614.12000000" netUnrealizedAppr="69041.99000000"/>
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      <mon3Flow redemption="2094426.51000000" reinvestment="564330.67000000" sales="188436.71000000"/>



    </fundInfo>
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        <invCountry>US</invCountry>
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        <fairValLevel>1</fairValLevel>
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          <isLoanByFund>N</isLoanByFund>
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      </invstOrSec>
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        <name>Multifactor International Equity Fund</name>
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        <name>Opportunistic Credit Fund</name>
        <lei>QMX8CVY41B3G014K7N60</lei>
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        <fairValLevel>1</fairValLevel>
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          <isLoanByFund>N</isLoanByFund>
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      </invstOrSec>
      <invstOrSec>
        <name>Multifactor U.S. Equity Fund</name>
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        <fairValLevel>1</fairValLevel>
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      </invstOrSec>
      <invstOrSec>
        <name>Emerging Markets Fund</name>
        <lei>TUWQFBBWGP866F5SFO52</lei>
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        <units>NS</units>
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        <fairValLevel>1</fairValLevel>
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      <invstOrSec>
        <name>U.S. Small Cap Equity Fund</name>
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        <identifiers>
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        <units>NS</units>
        <curCd>USD</curCd>
        <valUSD>1257111.11000000</valUSD>
        <pctVal>1.994638191142</pctVal>
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        <invCountry>US</invCountry>
        <isRestrictedSec>N</isRestrictedSec>

        <fairValLevel>1</fairValLevel>
        <securityLending>
          <isCashCollateral>N</isCashCollateral>
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          <isLoanByFund>N</isLoanByFund>
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      </invstOrSec>
      <invstOrSec>
        <name>Strategic Bond Fund</name>
        <lei>XI1M1CDVRC8YNT0B5804</lei>
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        <cusip>782493159</cusip>
        <identifiers>
          <isin value="US7824931593"/>
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        <curCd>USD</curCd>
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        <fairValLevel>1</fairValLevel>
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      </invstOrSec>
      <invstOrSec>
        <name>Investment Grade Bond Fund</name>
        <lei>6XE31ODZPBO0SIDX5S75</lei>
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        <cusip>782493175</cusip>
        <identifiers>
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        <curCd>USD</curCd>
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        <pctVal>19.00809699184</pctVal>
        <payoffProfile>Long</payoffProfile>
        <assetCat>EC</assetCat>
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        <isRestrictedSec>N</isRestrictedSec>

        <fairValLevel>1</fairValLevel>
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          <isLoanByFund>N</isLoanByFund>
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      </invstOrSec>
      <invstOrSec>
        <name>Short Duration Bond Fund</name>
        <lei>SYIWP2HFI2PTL75P6V57</lei>
        <title>Short Duration Bond Fund</title>
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        <identifiers>
          <isin value="US7824944216"/>
        </identifiers>
        <balance>280845.05000000</balance>
        <units>NS</units>
        <curCd>USD</curCd>
        <valUSD>5324822.11000000</valUSD>
        <pctVal>8.448810496666</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 Real Estate Securities Fund</name>
        <lei>12EWS3SG92VUE6HTB591</lei>
        <title>Global Real Estate Securities Fund</title>
        <cusip>782478713</cusip>
        <identifiers>
          <isin value="US7824787136"/>
        </identifiers>
        <balance>43403.96000000</balance>
        <units>NS</units>
        <curCd>USD</curCd>
        <valUSD>1271735.91000000</valUSD>
        <pctVal>2.017843128546</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>
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      </invstOrSec>
      <invstOrSec>
        <name>Multi-Strategy Income Fund</name>
        <lei>549300A5DFWAE2ARUU44</lei>
        <title>Multi-Strategy Income Fund</title>
        <cusip>78249R214</cusip>
        <identifiers>
          <isin value="US78249R2141"/>
        </identifiers>
        <balance>529040.04000000</balance>
        <units>NS</units>
        <curCd>USD</curCd>
        <valUSD>5057622.79000000</valUSD>
        <pctVal>8.024849588136</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="Beginning with the period ended February 28, 2025, the total returns do not reflect the deduction of sales loads" noteItem="B.5.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.c"/>
      <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"/>
    </explntrNotes>
    <signature>
      <ncom:dateSigned>2025-05-28</ncom:dateSigned>
      <ncom:nameOfApplicant>RUSSELL INVESTMENT CO</ncom:nameOfApplicant>
      <ncom:signature>Kari Seabrands</ncom:signature>
      <ncom:signerName>Kari Seabrands</ncom:signerName>
      <ncom:title>Treasurer, Principal Accounting Officer and Principal Financial Officer</ncom:title>
    </signature>
  </formData>
</edgarSubmission>
