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    <filerInfo>
      <filer>
        <filerCredentials>
          <cik>0001213244</cik>
          <ccc>XXXXXXXX</ccc>
        </filerCredentials>
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      <liveTestFlag>LIVE</liveTestFlag>


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    <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>29261</noOfUnitsSold>
      <aggregateMarketValue>731525.00</aggregateMarketValue>
      <noOfUnitsOutstanding>3520646</noOfUnitsOutstanding>
      <approxSaleDate>04/25/2023</approxSaleDate>
      <securitiesExchangeName>ASE</securitiesExchangeName>
    </securitiesInformation>
    <securitiesToBeSold>
      <securitiesClassTitle>Common</securitiesClassTitle>
      <acquiredDate>04/25/2023</acquiredDate>
      <natureOfAcquisitionTransaction>Stock Award</natureOfAcquisitionTransaction>
      <nameOfPersonfromWhomAcquired>Issuer</nameOfPersonfromWhomAcquired>
      <isGiftTransaction>N</isGiftTransaction>
      <amountOfSecuritiesAcquired>29261</amountOfSecuritiesAcquired>
      <paymentDate>04/25/2023</paymentDate>
      <natureOfPayment>n/a</natureOfPayment>
    </securitiesToBeSold>
    <nothingToReportFlagOnSecuritiesSoldInPast3Months>Y</nothingToReportFlagOnSecuritiesSoldInPast3Months>
    <noticeSignature>
      <noticeDate>04/25/2023</noticeDate>
      <signature>/s/ Carmen Zamores as a duly authorized representative of Fidelity Brokerage Services LLC, as attorney-in-fact for OLSCHAN BRIAN S</signature>
    </noticeSignature>
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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
29261
731525.00
3520646
04/25/2023
ASE
Common
04/25/2023
Stock Award
Issuer
N
29261
04/25/2023
n/a
Y
04/25/2023
/s/ Carmen Zamores as a duly authorized representative of Fidelity Brokerage Services LLC, as attorney-in-fact for OLSCHAN BRIAN S