<?xml version="1.0" encoding="UTF-8"?>
<edgarSubmission xmlns:com="http://www.sec.gov/edgar/common" xmlns="http://www.sec.gov/edgar/thirteenffiler">
  <schemaVersion>X0202</schemaVersion>
  <headerData>
    <submissionType>13F-HR</submissionType>
    <filerInfo>
      <liveTestFlag>LIVE</liveTestFlag>
      <filer>
        <credentials>
          <cik>0001260945</cik>
          <ccc>XXXXXXXX</ccc>
        </credentials>
      </filer>
      <periodOfReport>12-31-2025</periodOfReport>
    </filerInfo>
  </headerData>
  <formData>
    <coverPage>
      <reportCalendarOrQuarter>12-31-2025</reportCalendarOrQuarter>
      <isAmendment>false</isAmendment>
      <filingManager>
        <name>THOMAS H LEE PARTNERS LP</name>
        <address>
          <com:street1>100 FEDERAL STREET, 36TH FLOOR</com:street1>
          <com:city>BOSTON</com:city>
          <com:stateOrCountry>MA</com:stateOrCountry>
          <com:zipCode>02110</com:zipCode>
        </address>
      </filingManager>
      <reportType>13F HOLDINGS REPORT</reportType>
      <form13FFileNumber>028-11970</form13FFileNumber>
      <provideInfoForInstruction5>N</provideInfoForInstruction5>
    </coverPage>
    <signatureBlock>
      <name>Jeffrey Schechter</name>
      <title>Chief Financial Officer</title>
      <phone>(617) 227-1050</phone>
      <signature>/s/ Jeffrey Schechter</signature>
      <city>Boston</city>
      <stateOrCountry>MA</stateOrCountry>
      <signatureDate>02-06-2026</signatureDate>
    </signatureBlock>
    <summaryPage>
      <otherIncludedManagersCount>0</otherIncludedManagersCount>
      <tableEntryTotal>1</tableEntryTotal>
      <tableValueTotal>0</tableValueTotal>
    </summaryPage>
  </formData>
</edgarSubmission>
