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      <filer>
        <filerCredentials>
          <cik>0001591397</cik>
          <ccc>XXXXXXXX</ccc>
        </filerCredentials>
      </filer>
      <liveTestFlag>LIVE</liveTestFlag>



    </filerInfo>
  </headerData>
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    <issuerInfo>
      <issuerCik>0001026655</issuerCik>
      <issuerName>CORE MOLDING TECHNOLOGIES INC</issuerName>
      <secFileNumber>001-12505</secFileNumber>
      <issuerAddress>
        <com:street1>800 MANOR PARK DRIVE</com:street1>
        <com:street2>P O BOX 28183</com:street2>
        <com:city>COLUMBUS</com:city>
        <com:stateOrCountry>OH</com:stateOrCountry>
        <com:zipCode>43228</com:zipCode>
      </issuerAddress>
      <issuerContactPhone>614-870-5000</issuerContactPhone>
      <nameOfPersonForWhoseAccountTheSecuritiesAreToBeSold>Zimmer John P</nameOfPersonForWhoseAccountTheSecuritiesAreToBeSold>
      <relationshipsToIssuer>
        <relationshipToIssuer>Officer</relationshipToIssuer>
      </relationshipsToIssuer>
    </issuerInfo>
    <securitiesInformation>
      <securitiesClassTitle>Common</securitiesClassTitle>
      <brokerOrMarketmakerDetails>
        <name>Charles Schwab Corp.</name>
        <address>
          <com:street1>3000 Schwab Way</com:street1>
          <com:city>Westlake</com:city>
          <com:stateOrCountry>TX</com:stateOrCountry>
          <com:zipCode>76262</com:zipCode>
        </address>
      </brokerOrMarketmakerDetails>
      <noOfUnitsSold>10000</noOfUnitsSold>
      <aggregateMarketValue>266500.00</aggregateMarketValue>
      <noOfUnitsOutstanding>9001199</noOfUnitsOutstanding>
      <approxSaleDate>09/22/2023</approxSaleDate>
      <securitiesExchangeName>Amex</securitiesExchangeName>
    </securitiesInformation>
    <securitiesToBeSold>
      <securitiesClassTitle>Common</securitiesClassTitle>
      <acquiredDate>01/13/2017</acquiredDate>
      <natureOfAcquisitionTransaction>Equity Stock Grants</natureOfAcquisitionTransaction>
      <nameOfPersonfromWhomAcquired>Issuer</nameOfPersonfromWhomAcquired>
      <isGiftTransaction>N</isGiftTransaction>
      <amountOfSecuritiesAcquired>11605</amountOfSecuritiesAcquired>
      <paymentDate>01/13/2017</paymentDate>
      <natureOfPayment>N/A</natureOfPayment>
    </securitiesToBeSold>
    <nothingToReportFlagOnSecuritiesSoldInPast3Months>N</nothingToReportFlagOnSecuritiesSoldInPast3Months>
    <securitiesSoldInPast3Months>
      <sellerDetails>
        <name>John Zimmer</name>
        <address>
          <com:street1>800 Manor Park Drive</com:street1>
          <com:city>Columbus</com:city>
          <com:stateOrCountry>OH</com:stateOrCountry>
          <com:zipCode>43228</com:zipCode>
        </address>
      </sellerDetails>
      <securitiesClassTitle>Common</securitiesClassTitle>
      <saleDate>09/05/2023</saleDate>
      <amountOfSecuritiesSold>6365</amountOfSecuritiesSold>
      <grossProceeds>1636106.00</grossProceeds>
    </securitiesSoldInPast3Months>
    <securitiesSoldInPast3Months>
      <sellerDetails>
        <name>John Zimmer</name>
        <address>
          <com:street1>800 Manor Park Drive</com:street1>
          <com:city>Columbus</com:city>
          <com:stateOrCountry>OH</com:stateOrCountry>
          <com:zipCode>43228</com:zipCode>
        </address>
      </sellerDetails>
      <securitiesClassTitle>Common</securitiesClassTitle>
      <saleDate>09/06/2023</saleDate>
      <amountOfSecuritiesSold>23</amountOfSecuritiesSold>
      <grossProceeds>580.75</grossProceeds>
    </securitiesSoldInPast3Months>
    <securitiesSoldInPast3Months>
      <sellerDetails>
        <name>John Zimmer</name>
        <address>
          <com:street1>800 Manor Park Drive</com:street1>
          <com:city>Columbus</com:city>
          <com:stateOrCountry>OH</com:stateOrCountry>
          <com:zipCode>43228</com:zipCode>
        </address>
      </sellerDetails>
      <securitiesClassTitle>Common</securitiesClassTitle>
      <saleDate>09/07/2023</saleDate>
      <amountOfSecuritiesSold>1057</amountOfSecuritiesSold>
      <grossProceeds>26689.00</grossProceeds>
    </securitiesSoldInPast3Months>
    <securitiesSoldInPast3Months>
      <sellerDetails>
        <name>John Zimmer</name>
        <address>
          <com:street1>800 Manor Park Drive</com:street1>
          <com:city>Columbus</com:city>
          <com:stateOrCountry>OH</com:stateOrCountry>
          <com:zipCode>43228</com:zipCode>
        </address>
      </sellerDetails>
      <securitiesClassTitle>Common</securitiesClassTitle>
      <saleDate>09/11/2023</saleDate>
      <amountOfSecuritiesSold>4030</amountOfSecuritiesSold>
      <grossProceeds>103047.00</grossProceeds>
    </securitiesSoldInPast3Months>
    <securitiesSoldInPast3Months>
      <sellerDetails>
        <name>John Zimmer</name>
        <address>
          <com:street1>800 Manor Park Drive</com:street1>
          <com:city>Columbus</com:city>
          <com:stateOrCountry>OH</com:stateOrCountry>
          <com:zipCode>43228</com:zipCode>
        </address>
      </sellerDetails>
      <securitiesClassTitle>Common</securitiesClassTitle>
      <saleDate>09/12/2023</saleDate>
      <amountOfSecuritiesSold>7000</amountOfSecuritiesSold>
      <grossProceeds>179787.00</grossProceeds>
    </securitiesSoldInPast3Months>
    <securitiesSoldInPast3Months>
      <sellerDetails>
        <name>John Zimmer</name>
        <address>
          <com:street1>800 Manor Park Drive</com:street1>
          <com:city>Columbus</com:city>
          <com:stateOrCountry>OH</com:stateOrCountry>
          <com:zipCode>43228</com:zipCode>
        </address>
      </sellerDetails>
      <securitiesClassTitle>Common</securitiesClassTitle>
      <saleDate>09/13/2023</saleDate>
      <amountOfSecuritiesSold>6000</amountOfSecuritiesSold>
      <grossProceeds>151924.00</grossProceeds>
    </securitiesSoldInPast3Months>
    <securitiesSoldInPast3Months>
      <sellerDetails>
        <name>John Zimmer</name>
        <address>
          <com:street1>800 Manor Park Drive</com:street1>
          <com:city>Columbus</com:city>
          <com:stateOrCountry>OH</com:stateOrCountry>
          <com:zipCode>43228</com:zipCode>
        </address>
      </sellerDetails>
      <securitiesClassTitle>Common</securitiesClassTitle>
      <saleDate>09/15/2023</saleDate>
      <amountOfSecuritiesSold>2071</amountOfSecuritiesSold>
      <grossProceeds>53249.00</grossProceeds>
    </securitiesSoldInPast3Months>
    <securitiesSoldInPast3Months>
      <sellerDetails>
        <name>John Zimmer</name>
        <address>
          <com:street1>John Zimmer</com:street1>
          <com:city>Columbus</com:city>
          <com:stateOrCountry>OH</com:stateOrCountry>
          <com:zipCode>43228</com:zipCode>
        </address>
      </sellerDetails>
      <securitiesClassTitle>Common</securitiesClassTitle>
      <saleDate>09/20/2023</saleDate>
      <amountOfSecuritiesSold>3454</amountOfSecuritiesSold>
      <grossProceeds>91289.00</grossProceeds>
    </securitiesSoldInPast3Months>
    <remarks>Client did not pay for the shares. They were stock grants as part of equity compensation. Client acquired: 1/13/2017: 7,655 shares 5/12/2018: 3,950 shares</remarks>
    <noticeSignature>
      <noticeDate>09/22/2023</noticeDate>
      <signature>John Zimmer</signature>
    </noticeSignature>
  </formData>
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144
0001591397
XXXXXXXX
LIVE
0001026655
CORE MOLDING TECHNOLOGIES INC
001-12505
800 MANOR PARK DRIVE
P O BOX 28183
COLUMBUS
OH
43228
614-870-5000
Zimmer John P
Officer
Common
Charles Schwab Corp.
3000 Schwab Way
Westlake
TX
76262
10000
266500.00
9001199
09/22/2023
Amex
Common
01/13/2017
Equity Stock Grants
Issuer
N
11605
01/13/2017
N/A
N
John Zimmer
800 Manor Park Drive
Columbus
OH
43228
Common
09/05/2023
6365
1636106.00
John Zimmer
800 Manor Park Drive
Columbus
OH
43228
Common
09/06/2023
23
580.75
John Zimmer
800 Manor Park Drive
Columbus
OH
43228
Common
09/07/2023
1057
26689.00
John Zimmer
800 Manor Park Drive
Columbus
OH
43228
Common
09/11/2023
4030
103047.00
John Zimmer
800 Manor Park Drive
Columbus
OH
43228
Common
09/12/2023
7000
179787.00
John Zimmer
800 Manor Park Drive
Columbus
OH
43228
Common
09/13/2023
6000
151924.00
John Zimmer
800 Manor Park Drive
Columbus
OH
43228
Common
09/15/2023
2071
53249.00
John Zimmer
John Zimmer
Columbus
OH
43228
Common
09/20/2023
3454
91289.00
Client did not pay for the shares. They were stock grants as part of equity compensation. Client acquired: 1/13/2017: 7,655 shares 5/12/2018: 3,950 shares
09/22/2023
John Zimmer