<?xml version="1.0" encoding="UTF-8"?>
<edgarSubmission xmlns:com="http://www.sec.gov/edgar/common" xmlns="http://www.sec.gov/edgar/npx">
  <headerData>
    <submissionType>N-PX</submissionType>
    <filerInfo>
      <registrantType>IM</registrantType>
      <liveTestFlag>LIVE</liveTestFlag>
      <filer>
        <issuerCredentials>
          <cik>0001545625</cik>
          <ccc>XXXXXXXX</ccc>
        </issuerCredentials>
      </filer>
      <periodOfReport>02/26/2026</periodOfReport>
    </filerInfo>
  </headerData>
  <formData>
    <coverPage>
      <yearOrQuarter>QUARTER</yearOrQuarter>
      <reportQuarterYear>2025</reportQuarterYear>
      <reportingPerson>
        <name>Columbia Capital IV, LLC</name>
        <phoneNumber>703-519-2000</phoneNumber>
        <address>
          <com:street1>204 South Union Street</com:street1>
          <com:city>Alexandria</com:city>
          <com:stateOrCountry>VA</com:stateOrCountry>
          <com:zipCode>22314</com:zipCode>
        </address>
      </reportingPerson>
      <agentForService>
        <name>Benjamin S. Lewis</name>
        <address>
          <com:street1>204 South Union Street</com:street1>
          <com:city>Alexandria</com:city>
          <com:stateOrCountry>VA</com:stateOrCountry>
          <com:zipCode>22314</com:zipCode>
        </address>
      </agentForService>
      <reportInfo>
        <reportType>INSTITUTIONAL MANAGER NOTICE REPORT</reportType>
        <noticeExplanation>REPORTING PERSON DID NOT EXERCISE VOTING</noticeExplanation>
        <confidentialTreatment>N</confidentialTreatment>
      </reportInfo>
      <fileNumber>028-15141</fileNumber>
      <explanatoryInformation>
        <explanatoryChoice>Y</explanatoryChoice>
        <explanatoryNotes>Neither of the issuers whose securities were the subject of Form 13F filings by the Institutional Manager included reportable voting matters in their applicable proxy statements. As a result, no votes were cast that are required to be reported pursuant to this Form N-PX.</explanatoryNotes>
      </explanatoryInformation>
    </coverPage>
    <signaturePage>
      <reportingPerson>Columbia Capital IV, LLC</reportingPerson>
      <txSignature>Benjamin S. Lewis</txSignature>
      <txPrintedSignature>Benjamin S. Lewis</txPrintedSignature>
      <txTitle>Chief Operating Officer</txTitle>
      <txAsOfDate>03/02/2026</txAsOfDate>
    </signaturePage>
  </formData>
</edgarSubmission>
