<?xml version="1.0" encoding="UTF-8"?>
<edgarSubmission xmlns="http://www.sec.gov/edgar/maifiler" xmlns:com="http://www.sec.gov/edgar/common_ma" xmlns:com1="http://www.sec.gov/edgar/common">
  <headerData>
    <submissionType>MA-I/A</submissionType>
    <filerInfo>
      <com:filer>
        <com1:filerId>0001733756</com1:filerId>
        <com1:filerCcc>XXXXXXXX</com1:filerCcc>
      </com:filer>
      <com:contact>
        <com1:name>Ted Vogtman</com1:name>
        <com1:phoneNumber>9736189509</com1:phoneNumber>
      </com:contact>
      <com:contactEmail>tvogtman@alternativereg.com</com:contactEmail>
      <com:notifications>
        <com1:internetNotificationAddress>tvogtman@alternativereg.com</com1:internetNotificationAddress>
      </com:notifications>
    </filerInfo>
  </headerData>
  <formData>
    <isAmendment>N</isAmendment>
    <previousAccessionNumber>0001733756-25-000022</previousAccessionNumber>
    <isIndividual>N</isIndividual>
    <applicantName>
      <com:firstName>Kristin</com:firstName>
      <com:middleName>Garcia</com:middleName>
      <com:lastName>Blomquist</com:lastName>
    </applicantName>
    <applicantCrdNum>5670721</applicantCrdNum>
    <hasMoreThanOneAdvisoryFirms>N</hasMoreThanOneAdvisoryFirms>
    <noOfAdvisoryFirms>1</noOfAdvisoryFirms>
    <municipalAdvisorOffices>
      <municipalAdvisorOffice>
        <municipalFirm>
          <municipalFiler>
            <filerId>0001733756</filerId>
          </municipalFiler>
          <municipalFirmName>Masterson Advisors LLC</municipalFirmName>
          <municipalDbaName>Masterson Advisors</municipalDbaName>
          <recentEmploymentCommencedDate>04-02-2018</recentEmploymentCommencedDate>
          <isIndependentRelatioship>N</isIndependentRelatioship>
        </municipalFirm>
        <maRegistration>
          <secRegistration>
            <com:fileNumber>867-02338</com:fileNumber>
          </secRegistration>
        </maRegistration>
        <advisorOffices>
          <advisorOffice>
            <locationInfo>LOCATED</locationInfo>
            <locationInfo>SUPERVISED</locationInfo>
            <startDate>04-02-2018</startDate>
            <addressInfo>
              <com:address>
                <com1:street1>3 Greenway Plaza</com1:street1>
                <com1:street2>SUITE 1100</com1:street2>
                <com1:city>HOUSTON</com1:city>
                <com1:stateOrCountry>TX</com1:stateOrCountry>
                <com1:zipCode>77046</com1:zipCode>
              </com:address>
            </addressInfo>
          </advisorOffice>
        </advisorOffices>
      </municipalAdvisorOffice>
    </municipalAdvisorOffices>
    <otherNames>
      <otherName>
        <com:firstName>Kristin</com:firstName>
        <com:middleName>Nicole</com:middleName>
        <com:lastName>Garcia</com:lastName>
      </otherName>
    </otherNames>
    <residentialHistory>
      
      
    </residentialHistory>
    <employmentHistory>
      <currentEmployer>
        <startDate>04-2018</startDate>
        <name>MASTERSON ADVISORS LLC</name>
        <addressInfo>
          <city>HOUSTON</city>
          <stateOrCountry>
            <com1:stateOrCountry>TX</com1:stateOrCountry>
          </stateOrCountry>
          <zipCode>77046</zipCode>
        </addressInfo>
        <isRelatedToMunicipalAdvisor>Y</isRelatedToMunicipalAdvisor>
        <isRelatedToInvestment>N</isRelatedToInvestment>
        <positionDescription>Vice President</positionDescription>
      </currentEmployer>
      <priorEmployers>
        <priorEmployer>
          <startDate>01-2016</startDate>
          <endDate>03-2018</endDate>
          <name>HILLTOP SECURITIES, INC.</name>
          <addressInfo>
            <city>HOUSTON</city>
            <stateOrCountry>
              <com1:stateOrCountry>TX</com1:stateOrCountry>
            </stateOrCountry>
            <zipCode>77042</zipCode>
          </addressInfo>
          <isRelatedToMunicipalAdvisor>Y</isRelatedToMunicipalAdvisor>
          <isRelatedToInvestment>Y</isRelatedToInvestment>
          <positionDescription>Assistant Vice President</positionDescription>
        </priorEmployer>
        <priorEmployer>
          <startDate>06-2010</startDate>
          <endDate>01-2016</endDate>
          <name>FIRST SOUTHWEST CO.</name>
          <addressInfo>
            <city>HOUSTON</city>
            <stateOrCountry>
              <com1:stateOrCountry>TX</com1:stateOrCountry>
            </stateOrCountry>
            <zipCode>77002</zipCode>
          </addressInfo>
          <isRelatedToMunicipalAdvisor>Y</isRelatedToMunicipalAdvisor>
          <isRelatedToInvestment>Y</isRelatedToInvestment>
          <positionDescription>Analyst - Associate</positionDescription>
        </priorEmployer>
        <priorEmployer>
          <startDate>08-2009</startDate>
          <endDate>06-2010</endDate>
          <name>UNEMPLOYED</name>
          <addressInfo>
            <city>HOUSTON</city>
            <stateOrCountry>
              <com1:stateOrCountry>TX</com1:stateOrCountry>
            </stateOrCountry>
            <zipCode>77042</zipCode>
          </addressInfo>
          <isRelatedToMunicipalAdvisor>N</isRelatedToMunicipalAdvisor>
          <isRelatedToInvestment>N</isRelatedToInvestment>
          <positionDescription>Unemployed</positionDescription>
        </priorEmployer>
        <priorEmployer>
          <startDate>05-2009</startDate>
          <endDate>08-2009</endDate>
          <name>FIRST SOUTHWEST CO.</name>
          <addressInfo>
            <city>HOUSTON</city>
            <stateOrCountry>
              <com1:stateOrCountry>TX</com1:stateOrCountry>
            </stateOrCountry>
            <zipCode>77002</zipCode>
          </addressInfo>
          <isRelatedToMunicipalAdvisor>Y</isRelatedToMunicipalAdvisor>
          <isRelatedToInvestment>Y</isRelatedToInvestment>
          <positionDescription>Intern</positionDescription>
        </priorEmployer>
        <priorEmployer>
          <startDate>12-2008</startDate>
          <endDate>05-2009</endDate>
          <name>UNEMPLOYED</name>
          <addressInfo>
            <city>WACO</city>
            <stateOrCountry>
              <com1:stateOrCountry>TX</com1:stateOrCountry>
            </stateOrCountry>
            <zipCode>76706</zipCode>
          </addressInfo>
          <isRelatedToMunicipalAdvisor>N</isRelatedToMunicipalAdvisor>
          <isRelatedToInvestment>N</isRelatedToInvestment>
          <positionDescription>Unemployed</positionDescription>
        </priorEmployer>
        <priorEmployer>
          <startDate>08-2004</startDate>
          <endDate>12-2008</endDate>
          <name>BAYLOR UNIVERSITY</name>
          <addressInfo>
            <city>WACO</city>
            <stateOrCountry>
              <com1:stateOrCountry>TX</com1:stateOrCountry>
            </stateOrCountry>
            <zipCode>76706</zipCode>
          </addressInfo>
          <isRelatedToMunicipalAdvisor>N</isRelatedToMunicipalAdvisor>
          <isRelatedToInvestment>N</isRelatedToInvestment>
          <positionDescription>Student</positionDescription>
        </priorEmployer>
      </priorEmployers>
    </employmentHistory>
    <isEngagedInOtherBusiness>Y</isEngagedInOtherBusiness>
    <otherBusinesses>
      <otherBusiness>
        <startDate>09-2019</startDate>
        <name>Harris County Hospital District Foundation</name>
        <addressInfo>
          <com1:street1>2525 Holly Hall St</com1:street1>
          <com1:city>Houston</com1:city>
          <com1:stateOrCountry>TX</com1:stateOrCountry>
          <com1:zipCode>77054</com1:zipCode>
        </addressInfo>
        <isRelatedToMunicipalAdvisor>N</isRelatedToMunicipalAdvisor>
        <isRelatedToInvestment>N</isRelatedToInvestment>
        <natureOfBusiness>501(c)3 organization that raises funds and awareness in support of the Harris Health System</natureOfBusiness>
        <positionDescription>Chairman</positionDescription>
        <approximateHoursOrMonths>10</approximateHoursOrMonths>
        <dutiesDescription>Help raise money for the Harris Health System</dutiesDescription>
      </otherBusiness>
      <otherBusiness>
        <startDate>09-2021</startDate>
        <name>Houston Parks Board</name>
        <addressInfo>
          <com1:street1>300 North Post Oak Lane</com1:street1>
          <com1:city>Houston</com1:city>
          <com1:stateOrCountry>TX</com1:stateOrCountry>
          <com1:zipCode>77024</com1:zipCode>
        </addressInfo>
        <isRelatedToMunicipalAdvisor>N</isRelatedToMunicipalAdvisor>
        <isRelatedToInvestment>N</isRelatedToInvestment>
        <natureOfBusiness>Not for Profit, Philanthropic</natureOfBusiness>
        <positionDescription>Secretary of the Houston Parks Board</positionDescription>
        <approximateHoursOrMonths>6</approximateHoursOrMonths>
        <dutiesDescription>advise on park, trail and greenspace projects and funding.  Help fundraise and network</dutiesDescription>
      </otherBusiness>
      <otherBusiness>
        <startDate>10-2023</startDate>
        <name>Precinct4Forward</name>
        <addressInfo>
          <com1:street1>14444 Holderrieth Rd</com1:street1>
          <com1:city>Tomball</com1:city>
          <com1:stateOrCountry>TX</com1:stateOrCountry>
          <com1:zipCode>77377</com1:zipCode>
        </addressInfo>
        <isRelatedToMunicipalAdvisor>N</isRelatedToMunicipalAdvisor>
        <isRelatedToInvestment>N</isRelatedToInvestment>
        <natureOfBusiness>Charity, Non-profit</natureOfBusiness>
        <positionDescription>Director</positionDescription>
        <approximateHoursOrMonths>3</approximateHoursOrMonths>
        <dutiesDescription>discuss opportunities to improve the well-being of residents of Harris County by supporting services and infrastructure.</dutiesDescription>
      </otherBusiness>
      <otherBusiness>
        <startDate>05-2025</startDate>
        <name>Good Reason Houston</name>
        <addressInfo>
          <com1:street1>8 Greenway</com1:street1>
          <com1:street2>Suite 900</com1:street2>
          <com1:city>Houston</com1:city>
          <com1:stateOrCountry>TX</com1:stateOrCountry>
          <com1:zipCode>77046</com1:zipCode>
        </addressInfo>
        <isRelatedToMunicipalAdvisor>N</isRelatedToMunicipalAdvisor>
        <isRelatedToInvestment>N</isRelatedToInvestment>
        <natureOfBusiness>supports educational initiatives, legislative impact and advocacy, and program</natureOfBusiness>
        <positionDescription>Board Member</positionDescription>
        <approximateHoursOrMonths>5</approximateHoursOrMonths>
        <dutiesDescription>Help provide feedback on educational initiatives, legislative impact and advocacy, and programs.</dutiesDescription>
      </otherBusiness>
    </otherBusinesses>
    <disclosureQuestions>
      <criminalDisclosure>
        <criminalDisclosureCommonQuestion>
          <com:isConvictedOfFelony>N</com:isConvictedOfFelony>
          <com:isChargedWithFelony>N</com:isChargedWithFelony>
          <com:isOrgConvictedOfFelony>N</com:isOrgConvictedOfFelony>
          <com:isOrgChargedWithFelony>N</com:isOrgChargedWithFelony>
        </criminalDisclosureCommonQuestion>
        <isConvictedOfMisdemeanor>N</isConvictedOfMisdemeanor>
        <isChargedWithMisdemeanor>N</isChargedWithMisdemeanor>
        <isOrgConvictedOfMisdemeanor>N</isOrgConvictedOfMisdemeanor>
        <isOrgChargedWithMisdemeanor>N</isOrgChargedWithMisdemeanor>
      </criminalDisclosure>
      <regulatoryDisclosure>
        <regulatoryDisclosureCommonQuestion>
          <com:isMadeFalseStatement>N</com:isMadeFalseStatement>
          <com:isViolatedRegulation>N</com:isViolatedRegulation>
          <com:isCauseOfDenial>N</com:isCauseOfDenial>
          <com:isOrderAgainst>N</com:isOrderAgainst>
          <com:isImposedPenalty>N</com:isImposedPenalty>
          <com:isUnEthical>N</com:isUnEthical>
          <com:isFoundInViolationOfRegulation>N</com:isFoundInViolationOfRegulation>
          <com:isFoundInCauseOfDenial>N</com:isFoundInCauseOfDenial>
          <com:isOrderAgainstActivity>N</com:isOrderAgainstActivity>
          <com:isDeniedLicense>N</com:isDeniedLicense>
          <com:isFoundMadeFalseStatement>N</com:isFoundMadeFalseStatement>
          <com:isFoundInViolationOfRules>N</com:isFoundInViolationOfRules>
          <com:isFoundInCauseOfSuspension>N</com:isFoundInCauseOfSuspension>
          <com:isDiscipliend>N</com:isDiscipliend>
          <com:isAuthorizedToActAttorney>N</com:isAuthorizedToActAttorney>
          <com:isRegulatoryComplaint>N</com:isRegulatoryComplaint>
        </regulatoryDisclosureCommonQuestion>
        <isViolatedSecurityAct>N</isViolatedSecurityAct>
        <isWillFullyAided>N</isWillFullyAided>
        <isFailedToSupervise>N</isFailedToSupervise>
        <isFoundWillFullyAided>N</isFoundWillFullyAided>
        <isAssociationBared>N</isAssociationBared>
        <isFinalOrder>N</isFinalOrder>
        <isWillFullyViolatedSecurityAct>N</isWillFullyViolatedSecurityAct>
        <isFailedResonably>N</isFailedResonably>
      </regulatoryDisclosure>
      <investigationDisclosure>
        <isInvestigated>N</isInvestigated>
      </investigationDisclosure>
      <civilDisclosure>
        <com:isEnjoined>N</com:isEnjoined>
        <com:isFoundInViolationOfRegulation>N</com:isFoundInViolationOfRegulation>
        <com:isDismissed>N</com:isDismissed>
        <com:isNamedInCivilProceeding>N</com:isNamedInCivilProceeding>
      </civilDisclosure>
      <complaintDisclosure>
        <isComplaintPending>N</isComplaintPending>
        <isComplaintSettled>N</isComplaintSettled>
        <isFraudCasePending>N</isFraudCasePending>
        <isFraudCaseResultedAward>N</isFraudCaseResultedAward>
        <isFraudCaseSettled>N</isFraudCaseSettled>
      </complaintDisclosure>
      <terminationDisclosure>
        <isViloatedIndustryStandard>N</isViloatedIndustryStandard>
        <isInvolvedInFraud>N</isInvolvedInFraud>
        <isFailedToSupervise>N</isFailedToSupervise>
      </terminationDisclosure>
      <financialDisclosure>
        <isCompromised>N</isCompromised>
        <isBankruptcyPetition>N</isBankruptcyPetition>
        <isTrusteeApointed>N</isTrusteeApointed>
        <isBondRevoked>N</isBondRevoked>
      </financialDisclosure>
      <judgmentLienDisclosure>
        <isLienAgainst>N</isLienAgainst>
      </judgmentLienDisclosure>
    </disclosureQuestions>
    <signatureInfo>
      <com:signature>
        <com:dateSigned>08-11-2026</com:dateSigned>
        <com:signature>Kimberly McManus</com:signature>
        <com:title>President, Alternative Regulatory Solutions, LLC</com:title>
      </com:signature>
    </signatureInfo>
  </formData>
</edgarSubmission>
