content: <?xml version="1.0" encoding="UTF-8"?><edgarSubmission xmlns="http://www.sec.gov/edgar/ownership" xmlns:com="http://www.sec.gov/edgar/common">
    <headerData>
      <submissionType>144</submissionType>
      <filerInfo>
        <filer>
          <filerCredentials>
            <cik>0001213244</cik>
            <ccc>XXXXXXXX</ccc>
          </filerCredentials>
        </filer>
        <liveTestFlag>LIVE</liveTestFlag>
  
  
      </filerInfo>
    </headerData>
    <formData>
      <issuerInfo>
        <issuerCik>0000002098</issuerCik>
        <issuerName>ACME UNITED CORP</issuerName>
        <secFileNumber>001-07698</secFileNumber>
        <issuerAddress>
          <com:street1>1 WATERVIEW DRIVE</com:street1>
          <com:city>SHELTON</com:city>
          <com:stateOrCountry>CT</com:stateOrCountry>
          <com:zipCode>06484</com:zipCode>
        </issuerAddress>
        <issuerContactPhone>203-254-6060</issuerContactPhone>
        <nameOfPersonForWhoseAccountTheSecuritiesAreToBeSold>OLSCHAN BRIAN S</nameOfPersonForWhoseAccountTheSecuritiesAreToBeSold>
        <relationshipsToIssuer>
          <relationshipToIssuer>Officer</relationshipToIssuer>
        </relationshipsToIssuer>
      </issuerInfo>
      <securitiesInformation>
        <securitiesClassTitle>Common</securitiesClassTitle>
        <brokerOrMarketmakerDetails>
          <name>Fidelity Brokerage Services LLC</name>
          <address>
            <com:street1>245 Summer Street</com:street1>
            <com:city>Boston</com:city>
            <com:stateOrCountry>MA</com:stateOrCountry>
            <com:zipCode>02110</com:zipCode>
          </address>
        </brokerOrMarketmakerDetails>
        <noOfUnitsSold>35000</noOfUnitsSold>
        <aggregateMarketValue>1627150.00</aggregateMarketValue>
        <noOfUnitsOutstanding>3645200</noOfUnitsOutstanding>
        <approxSaleDate>04/23/2024</approxSaleDate>
        <securitiesExchangeName>AMEX</securitiesExchangeName>
      </securitiesInformation>
      <securitiesToBeSold>
        <securitiesClassTitle>Common</securitiesClassTitle>
        <acquiredDate>04/22/2024</acquiredDate>
        <natureOfAcquisitionTransaction>Stock Options</natureOfAcquisitionTransaction>
        <nameOfPersonfromWhomAcquired>Issuer</nameOfPersonfromWhomAcquired>
        <isGiftTransaction>N</isGiftTransaction>
        <amountOfSecuritiesAcquired>35000</amountOfSecuritiesAcquired>
        <paymentDate>04/22/2024</paymentDate>
        <natureOfPayment>Cash/ check</natureOfPayment>
      </securitiesToBeSold>
      <nothingToReportFlagOnSecuritiesSoldInPast3Months>Y</nothingToReportFlagOnSecuritiesSoldInPast3Months>
      <noticeSignature>
        <noticeDate>04/23/2024</noticeDate>
        <signature>/s/ Cristina Garcia, as a duly authorized representative of Fidelity Brokerage Services LLC, as attorney-in-fact for OLSCHAN BRIAN S</signature>
      </noticeSignature>
    </formData>
  </edgarSubmission>
metadata_documents: [{"type": "144", "sequence": "1", "filename": "primary_doc.xml", "secsgml_size_bytes": 2813}]
text: 144
  0001213244
  XXXXXXXX
  LIVE
  0000002098
  ACME UNITED CORP
  001-07698
  1 WATERVIEW DRIVE
  SHELTON
  CT
  06484
  203-254-6060
  OLSCHAN BRIAN S
  Officer
  Common
  Fidelity Brokerage Services LLC
  245 Summer Street
  Boston
  MA
  02110
  35000
  1627150.00
  3645200
  04/23/2024
  AMEX
  Common
  04/22/2024
  Stock Options
  Issuer
  N
  35000
  04/22/2024
  Cash/ check
  Y
  04/23/2024
  /s/ Cristina Garcia, as a duly authorized representative of Fidelity Brokerage Services LLC, as attorney-in-fact for OLSCHAN BRIAN S