<?xml version="1.0" encoding="UTF-8"?>
<edgarSubmission xmlns="http://www.sec.gov/edgar/thirteenffiler" xmlns:com="http://www.sec.gov/edgar/common">
  <schemaVersion>X0202</schemaVersion>
  <headerData>
    <submissionType>13F-HR</submissionType>
    <filerInfo>
      <liveTestFlag>LIVE</liveTestFlag>
      <flags>
        <confirmingCopyFlag>false</confirmingCopyFlag>
        <returnCopyFlag>false</returnCopyFlag>
        <overrideInternetFlag>false</overrideInternetFlag>
      </flags>
      <filer>
        <credentials>
          <cik>0001089877</cik>
          <ccc>XXXXXXXX</ccc>
        </credentials>
      </filer>
      <periodOfReport>12-31-2025</periodOfReport>
    </filerInfo>
  </headerData>
  <formData>
    <coverPage>
      <reportCalendarOrQuarter>12-31-2025</reportCalendarOrQuarter>
      <filingManager>
        <name>KEYBANK NATIONAL ASSOCIATION/OH</name>
        <address>
          <com:street1>OH-01-49-0303</com:street1>
          <com:street2>4900 TIEDEMAN ROAD</com:street2>
          <com:city>BROOKLYN</com:city>
          <com:stateOrCountry>OH</com:stateOrCountry>
          <com:zipCode>44144</com:zipCode>
        </address>
      </filingManager>
      <reportType>13F HOLDINGS REPORT</reportType>
      <form13FFileNumber>028-06343</form13FFileNumber>
      <provideInfoForInstruction5>N</provideInfoForInstruction5>
    </coverPage>
    <signatureBlock>
      <name>Erin Monroe</name>
      <title>VP, Investment Reporting &amp; Support; LPOS Internal Control</title>
      <phone>2168138040</phone>
      <signature>Erin Monroe</signature>
      <city>Brooklyn</city>
      <stateOrCountry>OH</stateOrCountry>
      <signatureDate>01-30-2026</signatureDate>
    </signatureBlock>
    <summaryPage>
      <otherIncludedManagersCount>2</otherIncludedManagersCount>
      <tableEntryTotal>1816</tableEntryTotal>
      <tableValueTotal>27920104096</tableValueTotal>
      <isConfidentialOmitted>false</isConfidentialOmitted>
      <otherManagers2Info>
        <otherManager2>
          <sequenceNumber>3</sequenceNumber>
          <otherManager>
            <cik>0001074714</cik>
            <form13FFileNumber>028-04569</form13FFileNumber>
            <crdNumber>000000566</crdNumber>
            <name>KEYBANC CAPITAL MARKETS,INC /OH/</name>
          </otherManager>
        </otherManager2>
        <otherManager2>
          <sequenceNumber>4</sequenceNumber>
          <otherManager>
            <cik>0002011135</cik>
            <form13FFileNumber>028-23751</form13FFileNumber>
            <name>Key National Trust Co of Delaware</name>
          </otherManager>
        </otherManager2>
      </otherManagers2Info>
    </summaryPage>
  </formData>
</edgarSubmission>
