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        <confirmingCopyFlag>false</confirmingCopyFlag>
        <returnCopyFlag>false</returnCopyFlag>
        <overrideInternetFlag>false</overrideInternetFlag>
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      <filer>
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          <cik>0001133521</cik>
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      <periodOfReport>06-30-2024</periodOfReport>
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      <isAmendment>false</isAmendment>
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        <name>STEELHEAD PARTNERS LLC</name>
        <address>
          <ns1:street1>800 Fifth Avenue</ns1:street1>
          <ns1:street2>Suite 3700</ns1:street2>
          <ns1:city>Seattle</ns1:city>
          <ns1:stateOrCountry>WA</ns1:stateOrCountry>
          <ns1:zipCode>98104</ns1:zipCode>
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      <reportType>13F HOLDINGS REPORT</reportType>
      <form13FFileNumber>028-06101</form13FFileNumber>
      <provideInfoForInstruction5>N</provideInfoForInstruction5>
    </coverPage>
    <signatureBlock>
      <name>Brent Binge</name>
      <title>General Counsel and Chief Compliance Officer</title>
      <phone>2063070922</phone>
      <signature>Brent E Binge</signature>
      <city>Seattle</city>
      <stateOrCountry>WA</stateOrCountry>
      <signatureDate>08-14-2024</signatureDate>
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