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    <isConfidential>false</isConfidential>
    <filerInfo>

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          <ccc>XXXXXXXX</ccc>
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        <classId>C000122687</classId>
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    </filerInfo>
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      <regFileNumber>811-04367</regFileNumber>
      <regCik>0000773757</regCik>
      <regLei>549300W5GIE6ZOZOTD82</regLei>
      <regStreet1>290 Congress Street</regStreet1>
      <regCity>Boston</regCity>
      <regStateConditional regCountry="US" regState="US-MA"/>
      <regZipOrPostalCode>02110</regZipOrPostalCode>
      <regPhone>800-345-6611</regPhone>
      <seriesName>Columbia Select Large Cap Growth Fund</seriesName>
      <seriesId>S000021575</seriesId>
      <seriesLei>L62MWOZ7AHBLTM7LP359</seriesLei>
      <repPdEnd>2024-03-31</repPdEnd>
      <repPdDate>2023-09-30</repPdDate>
      <isFinalFiling>N</isFinalFiling>
    </genInfo>
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      <totLiabs>400908.200000000000</totLiabs>
      <netAssets>1061865119.960000000000</netAssets>
      <assetsAttrMiscSec>0.000000000000</assetsAttrMiscSec>
      <assetsInvested>0.000000000000</assetsInvested>
      <amtPayOneYrBanksBorr>0.000000000000</amtPayOneYrBanksBorr>
      <amtPayOneYrCtrldComp>0.000000000000</amtPayOneYrCtrldComp>
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      <isNonCashCollateral>N</isNonCashCollateral>
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        <monthlyTotReturns>
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        <isRestrictedSec>N</isRestrictedSec>

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        <isRestrictedSec>N</isRestrictedSec>

        <fairValLevel>1</fairValLevel>
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        <name>INTUITIVE SRGCAL</name>
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        <title>Intuitive Surgical Inc</title>
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        <isRestrictedSec>N</isRestrictedSec>

        <fairValLevel>1</fairValLevel>
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      <invstOrSec>
        <name>ELI LILLY AND COMPANY</name>
        <lei>FRDRIPF3EKNDJ2CQJL29</lei>
        <title>Eli Lilly &amp; Co</title>
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        <isRestrictedSec>N</isRestrictedSec>

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        <name>LULULEMON ATHLETICA INC</name>
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        <title>Lululemon Athletica Inc</title>
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        <assetCat>EC</assetCat>
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        <invCountry>US</invCountry>

        <isRestrictedSec>N</isRestrictedSec>

        <fairValLevel>1</fairValLevel>
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        <name>MSCI INC</name>
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        <isRestrictedSec>N</isRestrictedSec>

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        <name>Mobileye Global Inc</name>
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        <isRestrictedSec>N</isRestrictedSec>

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        <isRestrictedSec>N</isRestrictedSec>

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        <isRestrictedSec>N</isRestrictedSec>

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        <name>PALO ALTO NETWORKS INC</name>
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        <title>Palo Alto Networks Inc</title>
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        <isRestrictedSec>N</isRestrictedSec>

        <fairValLevel>1</fairValLevel>
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        <title>Sarepta Therapeutics Inc</title>
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        <isRestrictedSec>N</isRestrictedSec>

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        <name>CHARLES SCHWAB CORP</name>
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        <title>Charles Schwab Corp/The</title>
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        <invCountry>US</invCountry>

        <isRestrictedSec>N</isRestrictedSec>

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        <name>SERVICENOW INC</name>
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        <title>ServiceNow Inc</title>
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        <invCountry>US</invCountry>

        <isRestrictedSec>N</isRestrictedSec>

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        <name>VISA INC</name>
        <lei>549300JZ4OKEHW3DPJ59</lei>
        <title>Visa Inc</title>
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        <assetCat>EC</assetCat>
        <issuerCat>CORP</issuerCat>
        <invCountry>US</invCountry>

        <isRestrictedSec>N</isRestrictedSec>

        <fairValLevel>1</fairValLevel>
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      <invstOrSec>
        <name>APTIV PLC</name>
        <lei>N/A</lei>
        <title>Aptiv PLC</title>
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        <payoffProfile>Long</payoffProfile>
        <assetCat>EC</assetCat>
        <issuerCat>CORP</issuerCat>
        <invCountry>JE</invCountry>

        <isRestrictedSec>N</isRestrictedSec>

        <fairValLevel>1</fairValLevel>
        <securityLending>
          <isCashCollateral>N</isCashCollateral>
          <isNonCashCollateral>N</isNonCashCollateral>
          <isLoanByFund>N</isLoanByFund>
        </securityLending>
      </invstOrSec>
      <invstOrSec>
        <name>TRANE TECHNOLOGIES PLC</name>
        <lei>549300BURLR9SLYY2705</lei>
        <title>Trane Technologies PLC</title>
        <cusip>G8994E103</cusip>
        <identifiers>
          <isin value="IE00BK9ZQ967"/>
          <ticker value="TT"/>
          <other otherDesc="Internal Id" value="G8994E103"/>
        </identifiers>
        <balance>132995.000000000000</balance>
        <units>NS</units>
        <curCd>USD</curCd>
        <valUSD>26986015.450000000000</valUSD>
        <pctVal>2.5413788383</pctVal>
        <payoffProfile>Long</payoffProfile>
        <assetCat>EC</assetCat>
        <issuerCat>CORP</issuerCat>
        <invCountry>IE</invCountry>

        <isRestrictedSec>N</isRestrictedSec>

        <fairValLevel>1</fairValLevel>
        <securityLending>
          <isCashCollateral>N</isCashCollateral>
          <isNonCashCollateral>N</isNonCashCollateral>
          <isLoanByFund>N</isLoanByFund>
        </securityLending>
      </invstOrSec>
      <invstOrSec>
        <name>ADOBE INC</name>
        <lei>FU4LY2G4933NH2E1CP29</lei>
        <title>Adobe Inc</title>
        <cusip>00724F101</cusip>
        <identifiers>
          <isin value="US00724F1012"/>
          <ticker value="ADBE"/>
          <other otherDesc="Internal Id" value="00724F101"/>
        </identifiers>
        <balance>83028.000000000000</balance>
        <units>NS</units>
        <curCd>USD</curCd>
        <valUSD>42335977.200000000000</valUSD>
        <pctVal>3.9869448958</pctVal>
        <payoffProfile>Long</payoffProfile>
        <assetCat>EC</assetCat>
        <issuerCat>CORP</issuerCat>
        <invCountry>US</invCountry>

        <isRestrictedSec>N</isRestrictedSec>

        <fairValLevel>1</fairValLevel>
        <securityLending>
          <isCashCollateral>N</isCashCollateral>
          <isNonCashCollateral>N</isNonCashCollateral>
          <isLoanByFund>N</isLoanByFund>
        </securityLending>
      </invstOrSec>
      <invstOrSec>
        <name>ADVANCED MICRO DEVICES INC</name>
        <lei>R2I72C950HOYXII45366</lei>
        <title>Advanced Micro Devices Inc</title>
        <cusip>007903107</cusip>
        <identifiers>
          <isin value="US0079031078"/>
          <ticker value="AMD"/>
          <other otherDesc="Internal Id" value="007903107"/>
        </identifiers>
        <balance>278522.000000000000</balance>
        <units>NS</units>
        <curCd>USD</curCd>
        <valUSD>28637632.040000000000</valUSD>
        <pctVal>2.6969180456</pctVal>
        <payoffProfile>Long</payoffProfile>
        <assetCat>EC</assetCat>
        <issuerCat>CORP</issuerCat>
        <invCountry>US</invCountry>

        <isRestrictedSec>N</isRestrictedSec>

        <fairValLevel>1</fairValLevel>
        <securityLending>
          <isCashCollateral>N</isCashCollateral>
          <isNonCashCollateral>N</isNonCashCollateral>
          <isLoanByFund>N</isLoanByFund>
        </securityLending>
      </invstOrSec>
      <invstOrSec>
        <name>AMAZON.COM INC</name>
        <lei>ZXTILKJKG63JELOEG630</lei>
        <title>Amazon.com Inc</title>
        <cusip>023135106</cusip>
        <identifiers>
          <isin value="US0231351067"/>
          <ticker value="AMZN"/>
          <other otherDesc="Internal Id" value="023135106"/>
        </identifiers>
        <balance>389035.000000000000</balance>
        <units>NS</units>
        <curCd>USD</curCd>
        <valUSD>49454129.200000000000</valUSD>
        <pctVal>4.6572891670</pctVal>
        <payoffProfile>Long</payoffProfile>
        <assetCat>EC</assetCat>
        <issuerCat>CORP</issuerCat>
        <invCountry>US</invCountry>

        <isRestrictedSec>N</isRestrictedSec>

        <fairValLevel>1</fairValLevel>
        <securityLending>
          <isCashCollateral>N</isCashCollateral>
          <isNonCashCollateral>N</isNonCashCollateral>
          <isLoanByFund>N</isLoanByFund>
        </securityLending>
      </invstOrSec>
      <invstOrSec>
        <name>APPLIED MAT INC</name>
        <lei>41BNNE1AFPNAZELZ6K07</lei>
        <title>Applied Materials Inc</title>
        <cusip>038222105</cusip>
        <identifiers>
          <isin value="US0382221051"/>
          <ticker value="AMAT"/>
          <other otherDesc="Internal Id" value="038222105"/>
        </identifiers>
        <balance>60295.000000000000</balance>
        <units>NS</units>
        <curCd>USD</curCd>
        <valUSD>8347842.750000000000</valUSD>
        <pctVal>0.7861490686</pctVal>
        <payoffProfile>Long</payoffProfile>
        <assetCat>EC</assetCat>
        <issuerCat>CORP</issuerCat>
        <invCountry>US</invCountry>

        <isRestrictedSec>N</isRestrictedSec>

        <fairValLevel>1</fairValLevel>
        <securityLending>
          <isCashCollateral>N</isCashCollateral>
          <isNonCashCollateral>N</isNonCashCollateral>
          <isLoanByFund>N</isLoanByFund>
        </securityLending>
      </invstOrSec>
      <invstOrSec>
        <name>BIOMARIN PHARMACEUTICAL INC.</name>
        <lei>NSLL8ITTRR0J5HEMR848</lei>
        <title>BioMarin Pharmaceutical Inc</title>
        <cusip>09061G101</cusip>
        <identifiers>
          <isin value="US09061G1013"/>
          <ticker value="BMRN"/>
          <other otherDesc="Internal Id" value="09061G101"/>
        </identifiers>
        <balance>377078.000000000000</balance>
        <units>NS</units>
        <curCd>USD</curCd>
        <valUSD>33363861.440000000000</valUSD>
        <pctVal>3.1420055912</pctVal>
        <payoffProfile>Long</payoffProfile>
        <assetCat>EC</assetCat>
        <issuerCat>CORP</issuerCat>
        <invCountry>US</invCountry>

        <isRestrictedSec>N</isRestrictedSec>

        <fairValLevel>1</fairValLevel>
        <securityLending>
          <isCashCollateral>N</isCashCollateral>
          <isNonCashCollateral>N</isNonCashCollateral>
          <isLoanByFund>N</isLoanByFund>
        </securityLending>
      </invstOrSec>
      <invstOrSec>
        <name>BOOKING HOLDINGS INC</name>
        <lei>FXM8FAOHMYDIPD38UZ17</lei>
        <title>Booking Holdings Inc</title>
        <cusip>09857L108</cusip>
        <identifiers>
          <isin value="US09857L1089"/>
          <ticker value="BKNG"/>
          <other otherDesc="Internal Id" value="09857L108"/>
        </identifiers>
        <balance>11107.000000000000</balance>
        <units>NS</units>
        <curCd>USD</curCd>
        <valUSD>34253432.650000000000</valUSD>
        <pctVal>3.2257799984</pctVal>
        <payoffProfile>Long</payoffProfile>
        <assetCat>EC</assetCat>
        <issuerCat>CORP</issuerCat>
        <invCountry>US</invCountry>

        <isRestrictedSec>N</isRestrictedSec>

        <fairValLevel>1</fairValLevel>
        <securityLending>
          <isCashCollateral>N</isCashCollateral>
          <isNonCashCollateral>N</isNonCashCollateral>
          <isLoanByFund>N</isLoanByFund>
        </securityLending>
      </invstOrSec>
      <invstOrSec>
        <name>CHIPOTLE MEXICAN GRILL INC</name>
        <lei>N/A</lei>
        <title>Chipotle Mexican Grill Inc</title>
        <cusip>169656105</cusip>
        <identifiers>
          <isin value="US1696561059"/>
          <ticker value="CMG"/>
          <other otherDesc="Internal Id" value="169656105"/>
        </identifiers>
        <balance>17584.000000000000</balance>
        <units>NS</units>
        <curCd>USD</curCd>
        <valUSD>32210898.720000000000</valUSD>
        <pctVal>3.0334265732</pctVal>
        <payoffProfile>Long</payoffProfile>
        <assetCat>EC</assetCat>
        <issuerCat>CORP</issuerCat>
        <invCountry>US</invCountry>

        <isRestrictedSec>N</isRestrictedSec>

        <fairValLevel>1</fairValLevel>
        <securityLending>
          <isCashCollateral>N</isCashCollateral>
          <isNonCashCollateral>N</isNonCashCollateral>
          <isLoanByFund>N</isLoanByFund>
        </securityLending>
      </invstOrSec>
      <invstOrSec>
        <name>COLUMBIA SHORT TERM CASH FUND</name>
        <lei>N/A</lei>
        <title>COLUMBIA SHORT TERM CASH FUND</title>
        <cusip>19766H239</cusip>
        <identifiers>
          <other otherDesc="Internal Id" value="19766H239"/>
        </identifiers>
        <balance>21271014.907000000000</balance>
        <units>NS</units>
        <curCd>USD</curCd>
        <valUSD>21264633.600000000000</valUSD>
        <pctVal>2.0025738863</pctVal>
        <payoffProfile>Long</payoffProfile>
        <assetCat>STIV</assetCat>
        <issuerCat>CORP</issuerCat>
        <invCountry>US</invCountry>

        <isRestrictedSec>N</isRestrictedSec>

        <fairValLevel>1</fairValLevel>
        <securityLending>
          <isCashCollateral>N</isCashCollateral>
          <isNonCashCollateral>N</isNonCashCollateral>
          <isLoanByFund>N</isLoanByFund>
        </securityLending>
      </invstOrSec>
      <invstOrSec>
        <name>COSTCO WHSLE CORP</name>
        <lei>29DX7H14B9S6O3FD6V18</lei>
        <title>Costco Wholesale Corp</title>
        <cusip>22160K105</cusip>
        <identifiers>
          <isin value="US22160K1051"/>
          <ticker value="COST"/>
          <other otherDesc="Internal Id" value="22160K105"/>
        </identifiers>
        <balance>76943.000000000000</balance>
        <units>NS</units>
        <curCd>USD</curCd>
        <valUSD>43469717.280000000000</valUSD>
        <pctVal>4.0937136424</pctVal>
        <payoffProfile>Long</payoffProfile>
        <assetCat>EC</assetCat>
        <issuerCat>CORP</issuerCat>
        <invCountry>US</invCountry>

        <isRestrictedSec>N</isRestrictedSec>

        <fairValLevel>1</fairValLevel>
        <securityLending>
          <isCashCollateral>N</isCashCollateral>
          <isNonCashCollateral>N</isNonCashCollateral>
          <isLoanByFund>N</isLoanByFund>
        </securityLending>
      </invstOrSec>
      <invstOrSec>
        <name>COSTAR GRP INC</name>
        <lei>N/A</lei>
        <title>CoStar Group Inc</title>
        <cusip>22160N109</cusip>
        <identifiers>
          <isin value="US22160N1090"/>
          <ticker value="CSGP"/>
          <other otherDesc="Internal Id" value="22160N109"/>
        </identifiers>
        <balance>484638.000000000000</balance>
        <units>NS</units>
        <curCd>USD</curCd>
        <valUSD>37263815.820000000000</valUSD>
        <pctVal>3.5092795798</pctVal>
        <payoffProfile>Long</payoffProfile>
        <assetCat>EC</assetCat>
        <issuerCat>CORP</issuerCat>
        <invCountry>US</invCountry>

        <isRestrictedSec>N</isRestrictedSec>

        <fairValLevel>1</fairValLevel>
        <securityLending>
          <isCashCollateral>N</isCashCollateral>
          <isNonCashCollateral>N</isNonCashCollateral>
          <isLoanByFund>N</isLoanByFund>
        </securityLending>
      </invstOrSec>
      <invstOrSec>
        <name>CROWDSTRIKE HOLDINGS INC</name>
        <lei>549300YBY08K9KM4HX32</lei>
        <title>Crowdstrike Holdings Inc</title>
        <cusip>22788C105</cusip>
        <identifiers>
          <isin value="US22788C1053"/>
          <ticker value="CRWD"/>
          <other otherDesc="Internal Id" value="22788C105"/>
        </identifiers>
        <balance>177849.000000000000</balance>
        <units>NS</units>
        <curCd>USD</curCd>
        <valUSD>29768365.620000000000</valUSD>
        <pctVal>2.8034036584</pctVal>
        <payoffProfile>Long</payoffProfile>
        <assetCat>EC</assetCat>
        <issuerCat>CORP</issuerCat>
        <invCountry>US</invCountry>

        <isRestrictedSec>N</isRestrictedSec>

        <fairValLevel>1</fairValLevel>
        <securityLending>
          <isCashCollateral>N</isCashCollateral>
          <isNonCashCollateral>N</isNonCashCollateral>
          <isLoanByFund>N</isLoanByFund>
        </securityLending>
      </invstOrSec>
      <invstOrSec>
        <name>DEXCOM</name>
        <lei>549300YSK3QDSFR5EU59</lei>
        <title>DexCom Inc</title>
        <cusip>252131107</cusip>
        <identifiers>
          <isin value="US2521311074"/>
          <ticker value="DXCM"/>
          <other otherDesc="Internal Id" value="252131107"/>
        </identifiers>
        <balance>145276.000000000000</balance>
        <units>NS</units>
        <curCd>USD</curCd>
        <valUSD>13554250.800000000000</valUSD>
        <pctVal>1.2764569195</pctVal>
        <payoffProfile>Long</payoffProfile>
        <assetCat>EC</assetCat>
        <issuerCat>CORP</issuerCat>
        <invCountry>US</invCountry>

        <isRestrictedSec>N</isRestrictedSec>

        <fairValLevel>1</fairValLevel>
        <securityLending>
          <isCashCollateral>N</isCashCollateral>
          <isNonCashCollateral>N</isNonCashCollateral>
          <isLoanByFund>N</isLoanByFund>
        </securityLending>
      </invstOrSec>
      <invstOrSec>
        <name>DYNATRACE INC</name>
        <lei>N/A</lei>
        <title>Dynatrace Inc</title>
        <cusip>268150109</cusip>
        <identifiers>
          <isin value="US2681501092"/>
          <ticker value="DT"/>
          <other otherDesc="Internal Id" value="268150109"/>
        </identifiers>
        <balance>585294.000000000000</balance>
        <units>NS</units>
        <curCd>USD</curCd>
        <valUSD>27350788.620000000000</valUSD>
        <pctVal>2.5757309573</pctVal>
        <payoffProfile>Long</payoffProfile>
        <assetCat>EC</assetCat>
        <issuerCat>CORP</issuerCat>
        <invCountry>US</invCountry>

        <isRestrictedSec>N</isRestrictedSec>

        <fairValLevel>1</fairValLevel>
        <securityLending>
          <isCashCollateral>N</isCashCollateral>
          <isNonCashCollateral>N</isNonCashCollateral>
          <isLoanByFund>N</isLoanByFund>
        </securityLending>
      </invstOrSec>
      <invstOrSec>
        <name>EXACT SCIENCES CORP</name>
        <lei>549300VM3X1FYD4N9Z14</lei>
        <title>Exact Sciences Corp</title>
        <cusip>30063P105</cusip>
        <identifiers>
          <isin value="US30063P1057"/>
          <ticker value="EXAS"/>
          <other otherDesc="Internal Id" value="30063P105"/>
        </identifiers>
        <balance>376135.000000000000</balance>
        <units>NS</units>
        <curCd>USD</curCd>
        <valUSD>25659929.700000000000</valUSD>
        <pctVal>2.4164961460</pctVal>
        <payoffProfile>Long</payoffProfile>
        <assetCat>EC</assetCat>
        <issuerCat>CORP</issuerCat>
        <invCountry>US</invCountry>

        <isRestrictedSec>N</isRestrictedSec>

        <fairValLevel>1</fairValLevel>
        <securityLending>
          <isCashCollateral>N</isCashCollateral>
          <isNonCashCollateral>N</isNonCashCollateral>
          <isLoanByFund>N</isLoanByFund>
        </securityLending>
      </invstOrSec>
      <invstOrSec>
        <name>ILLUMINA INC</name>
        <lei>SQ95QG8SR5Q56LSNF682</lei>
        <title>Illumina Inc</title>
        <cusip>452327109</cusip>
        <identifiers>
          <isin value="US4523271090"/>
          <ticker value="ILMN"/>
          <other otherDesc="Internal Id" value="452327109"/>
        </identifiers>
        <balance>112193.000000000000</balance>
        <units>NS</units>
        <curCd>USD</curCd>
        <valUSD>15401855.040000000000</valUSD>
        <pctVal>1.4504530519</pctVal>
        <payoffProfile>Long</payoffProfile>
        <assetCat>EC</assetCat>
        <issuerCat>CORP</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>2023-10-26</ncom:dateSigned>
      <ncom:nameOfApplicant>Columbia Funds Series Trust I</ncom:nameOfApplicant>
      <ncom:signature>Martha Skinner</ncom:signature>
      <ncom:signerName>Martha Skinner</ncom:signerName>
      <ncom:title>Assistant Treasurer</ncom:title>
    </signature>
  </formData>
</edgarSubmission>
