<?xml version="1.0" encoding="UTF-8"?>
<edgarSubmission xsi:schemaLocation="http://www.sec.gov/edgar/thirteenffiler eis_13F_Filer.xsd" xmlns="http://www.sec.gov/edgar/thirteenffiler" xmlns:ns1="http://www.sec.gov/edgar/common" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
  <schemaVersion>X0202</schemaVersion>
  <headerData>
    <submissionType>13F-NT</submissionType>
    <filerInfo>
      <liveTestFlag>LIVE</liveTestFlag>
      <flags>
        <confirmingCopyFlag>false</confirmingCopyFlag>
        <overrideInternetFlag>false</overrideInternetFlag>
      </flags>
      <filer>
        <credentials>
          <cik>0001381133</cik>
          <ccc>XXXXXXXX</ccc>
        </credentials>
      </filer>
      <periodOfReport>09-30-2026</periodOfReport>
    </filerInfo>
  </headerData>
  <formData>
    <coverPage>
      <reportCalendarOrQuarter>09-30-2026</reportCalendarOrQuarter>
      <isAmendment>false</isAmendment>
      <filingManager>
        <name>SUN LIFE CAPITAL MANAGEMENT (U.S.) LLC</name>
        <address>
          <ns1:street1>96 WORCESTER STREET</ns1:street1>
          <ns1:city>WELLESLEY HILLS</ns1:city>
          <ns1:stateOrCountry>MA</ns1:stateOrCountry>
          <ns1:zipCode>02481-5699</ns1:zipCode>
        </address>
      </filingManager>
      <reportType>13F NOTICE</reportType>
      <form13FFileNumber>028-12046</form13FFileNumber>
      <otherManagersInfo>
        <otherManager>
          <cik>0001097362</cik>
          <form13FFileNumber>028-05799</form13FFileNumber>
          <name>SUN LIFE FINANCIAL INC</name>
        </otherManager>
      </otherManagersInfo>
      <provideInfoForInstruction>N</provideInfoForInstruction>
    </coverPage>
    <signatureBlock>
      <name>Randolph Brown</name>
      <title>CIO, Sun Life</title>
      <phone>781-416-2297</phone>
      <signature>Randolph Brown</signature>
      <city>Wellesley Hills</city>
      <stateOrCountry>MA</stateOrCountry>
      <signatureDate>11-12-2026</signatureDate>
    </signatureBlock>
    <summaryPage>
      <otherIncludedManagersCount/>
      <tableEntryTotal/>
      <tableValueTotal/>
    </summaryPage>
  </formData>
</edgarSubmission>
