<?xml version="1.0" encoding="UTF-8"?><edgarSubmission xmlns="http://www.sec.gov/edgar/nport" xmlns:com="http://www.sec.gov/edgar/common" xmlns:ncom="http://www.sec.gov/edgar/nportcommon" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.sec.gov/edgar/nport eis_NPORT_Filer.xsd">
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    <isConfidential>false</isConfidential>
    <filerInfo>

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        <issuerCredentials>
          <cik>0000899148</cik>
          <ccc>XXXXXXXX</ccc>
        </issuerCredentials>
      </filer>


      <seriesClassInfo>
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        <classId>C000010307</classId>
        <classId>C000149021</classId>
        <classId>C000010310</classId>
        <classId>C000010309</classId>
      </seriesClassInfo>

    </filerInfo>
  </headerData>
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      <regName>Rydex Series Funds</regName>
      <regFileNumber>811-07584</regFileNumber>
      <regCik>0000899148</regCik>
      <regLei>5493004D62WV1EDNTU07</regLei>
      <regStreet1>702 King Farm Blvd., Suite 200</regStreet1>
      <regCity>Rockville</regCity>
      <regStateConditional regCountry="US" regState="US-MD"/>
      <regZipOrPostalCode>20850</regZipOrPostalCode>
      <regPhone>301-296-5100</regPhone>
      <seriesName>Government Long Bond 1.2x Strategy Fund</seriesName>
      <seriesId>S000003684</seriesId>
      <seriesLei>549300LDVIAAU00XRD49</seriesLei>
      <repPdEnd>2023-03-31</repPdEnd>
      <repPdDate>2022-06-30</repPdDate>
      <isFinalFiling>N</isFinalFiling>
    </genInfo>
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      <totLiabs>374066.46</totLiabs>
      <netAssets>88381233.71</netAssets>
      <assetsAttrMiscSec>0.00000000</assetsAttrMiscSec>
      <assetsInvested>0.00000000</assetsInvested>
      <amtPayOneYrBanksBorr>0.00000000</amtPayOneYrBanksBorr>
      <amtPayOneYrCtrldComp>0.00000000</amtPayOneYrCtrldComp>
      <amtPayOneYrOthAffil>0.00000000</amtPayOneYrOthAffil>
      <amtPayOneYrOther>0.00000000</amtPayOneYrOther>
      <amtPayAftOneYrBanksBorr>0.00000000</amtPayAftOneYrBanksBorr>
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      <amtPayAftOneYrOther>0.00000000</amtPayAftOneYrOther>
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      <standByCommit>0.00000000</standByCommit>
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      <isNonCashCollateral>N</isNonCashCollateral>
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        <name>US TREASURY N/B</name>
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            <descRefInstrmnt>
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                  <other otherDesc="Interest Rate Future" value="US 30yr 6.00%"/>
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      <invstOrSec>
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      <invstOrSec>
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        <fairValLevel>2</fairValLevel>
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      </invstOrSec>
      <invstOrSec>
        <name>Guggenheim Partners Investment Management LLC</name>
        <lei>N/A</lei>
        <title>Guggenheim Ultra Short Duration Fund - Institutional Class</title>
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        <identifiers>
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        <fairValLevel>1</fairValLevel>
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      </invstOrSec>
    </invstOrSecs>
    <signature>
      <ncom:dateSigned>2022-08-01</ncom:dateSigned>
      <ncom:nameOfApplicant>Rydex Series Funds</ncom:nameOfApplicant>
      <ncom:signature>John Sullivan</ncom:signature>
      <ncom:signerName>John Sullivan</ncom:signerName>
      <ncom:title>CFO</ncom:title>
    </signature>
  </formData>
  <documents>XXXX</documents>
</edgarSubmission>
