<?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">
  <headerData>
    <submissionType>13F-HR</submissionType>
    <filerInfo>
      <liveTestFlag>LIVE</liveTestFlag>
      <flags>
        <confirmingCopyFlag>false</confirmingCopyFlag>
        <returnCopyFlag>true</returnCopyFlag>
        <overrideInternetFlag>false</overrideInternetFlag>
      </flags>
      <filer>
        <credentials>
          <cik>0001060749</cik>
          <ccc>XXXXXXXX</ccc>
        </credentials>
      </filer>
      <periodOfReport>06-30-2013</periodOfReport>
    </filerInfo>
  </headerData>
  <formData>
    <coverPage>
      <reportCalendarOrQuarter>06-30-2013</reportCalendarOrQuarter>
      <filingManager>
        <name>KNIGHT CAPITAL GROUP, INC.</name>
        <address>
          <ns1:street1>545 WASHINGTON BLVD.</ns1:street1>
          <ns1:city>JERSEY CITY</ns1:city>
          <ns1:stateOrCountry>NJ</ns1:stateOrCountry>
          <ns1:zipCode>07310</ns1:zipCode>
        </address>
      </filingManager>
      <reportType>13F HOLDINGS REPORT</reportType>
      <form13FFileNumber>028-13543</form13FFileNumber>
      <provideInfoForInstruction5>N</provideInfoForInstruction5>
    </coverPage>
    <signatureBlock>
      <name>Matthew Levine</name>
      <title>Managing Director</title>
      <phone>201-356-1390</phone>
      <signature>Matthew Levine</signature>
      <city>Jersey City</city>
      <stateOrCountry>NJ</stateOrCountry>
      <signatureDate>08-08-2013</signatureDate>
    </signatureBlock>
    <summaryPage>
      <otherIncludedManagersCount>2</otherIncludedManagersCount>
      <tableEntryTotal>3276</tableEntryTotal>
      <tableValueTotal>5395857</tableValueTotal>
      <isConfidentialOmitted>false</isConfidentialOmitted>
      <otherManagers2Info>
        <otherManager2>
          <sequenceNumber>1</sequenceNumber>
          <otherManager>
            <form13FFileNumber>28-15067</form13FFileNumber>
            <name>Knight Capital Americas LLC</name>
          </otherManager>
        </otherManager2>
        <otherManager2>
          <sequenceNumber>2</sequenceNumber>
          <otherManager>
            <form13FFileNumber>28-13903</form13FFileNumber>
            <name>Astor Asset Management, LLC</name>
          </otherManager>
        </otherManager2>
      </otherManagers2Info>
    </summaryPage>
  </formData>
</edgarSubmission>
