<?xml version="1.0" encoding="UTF-8"?>
<edgarSubmission xmlns="http://www.sec.gov/edgar/thirteenffiler" xmlns:com="http://www.sec.gov/edgar/common">
  <headerData>
    <submissionType>13F-HR</submissionType>
    <filerInfo>
      <liveTestFlag>LIVE</liveTestFlag>
      <flags>
        <confirmingCopyFlag>false</confirmingCopyFlag>
        <returnCopyFlag>true</returnCopyFlag>
        <overrideInternetFlag>true</overrideInternetFlag>
      </flags>
      <filer>
        <credentials>
          <cik>0001602905</cik>
          <ccc>XXXXXXXX</ccc>
        </credentials>
      </filer>
      <periodOfReport>12-31-2018</periodOfReport>
    </filerInfo>
  </headerData>
  <formData>
    <coverPage>
      <reportCalendarOrQuarter>12-31-2018</reportCalendarOrQuarter>
      <filingManager>
        <name>MCF Advisors LLC</name>
        <address>
          <com:street1>50 E RIVERCENTER BLVD.</com:street1>
          <com:street2>SUITE 300</com:street2>
          <com:city>COVINGTON</com:city>
          <com:stateOrCountry>KY</com:stateOrCountry>
          <com:zipCode>41011</com:zipCode>
        </address>
      </filingManager>
      <reportType>13F HOLDINGS REPORT</reportType>
      <form13FFileNumber>028-16138</form13FFileNumber>
      <provideInfoForInstruction5>N</provideInfoForInstruction5>
    </coverPage>
    <signatureBlock>
      <name>Timothy A. Gavin</name>
      <title>Chief Compliance Officer</title>
      <phone>859-392-1374</phone>
      <signature>Timothy A. Gavin</signature>
      <city>Covington</city>
      <stateOrCountry>KY</stateOrCountry>
      <signatureDate>01-25-2018</signatureDate>
    </signatureBlock>
    <summaryPage>
      <otherIncludedManagersCount>0</otherIncludedManagersCount>
      <tableEntryTotal>496</tableEntryTotal>
      <tableValueTotal>523139</tableValueTotal>
      <isConfidentialOmitted>false</isConfidentialOmitted>
    </summaryPage>
  </formData>
</edgarSubmission>
