<?xml version="1.0" encoding="UTF-8"?><edgarSubmission xmlns="http://www.sec.gov/edgar/schedule13g" xmlns:com="http://www.sec.gov/edgar/common">
  <headerData>
    <submissionType>SCHEDULE 13G/A</submissionType>
    <previousAccessionNumber>0001085146-15-000104</previousAccessionNumber>
    <filerInfo>
      <filer>
        <filerCredentials>
          <!-- Field: Pseudo-Tag; ID: Name; Data: Conestoga Capital Advisors, LLC -->
          <cik>0001163744</cik>
          <ccc>XXXXXXXX</ccc>
        </filerCredentials>
      </filer>
      <liveTestFlag>LIVE</liveTestFlag>



    </filerInfo>
  </headerData>
  <formData>
    <coverPageHeader>
      <amendmentNo>11</amendmentNo>
      <securitiesClassTitle>Common Stock</securitiesClassTitle>
      <eventDateRequiresFilingThisStatement>12/31/2024</eventDateRequiresFilingThisStatement>
      <issuerInfo>
        <issuerCik>0000724004</issuerCik>
        <issuerName>MESA LABORATORIES INC /CO/</issuerName>
        <issuerCusip>59064R109</issuerCusip>
        <issuerPrincipalExecutiveOfficeAddress>
          <com:street1>12100 West Sixth Avenue</com:street1>
          <com:city>LAKEWOOD</com:city>
          <com:stateOrCountry>CO</com:stateOrCountry>
          <com:zipCode>80228</com:zipCode>
        </issuerPrincipalExecutiveOfficeAddress>
      </issuerInfo>
      <designateRulesPursuantThisScheduleFiled>
        <designateRulePursuantThisScheduleFiled>Rule 13d-1(b)</designateRulePursuantThisScheduleFiled>
      </designateRulesPursuantThisScheduleFiled>
    </coverPageHeader>
    <coverPageHeaderReportingPersonDetails>


      <reportingPersonName>Conestoga Capital Advisors</reportingPersonName>
      <citizenshipOrOrganization>DE</citizenshipOrOrganization>
      <reportingPersonBeneficiallyOwnedNumberOfShares>
        <soleVotingPower>573037.00</soleVotingPower>
        <sharedVotingPower>0.00</sharedVotingPower>
        <soleDispositivePower>618111.00</soleDispositivePower>
        <sharedDispositivePower>0.00</sharedDispositivePower>
      </reportingPersonBeneficiallyOwnedNumberOfShares>
      <reportingPersonBeneficiallyOwnedAggregateNumberOfShares>618111.00</reportingPersonBeneficiallyOwnedAggregateNumberOfShares>
      <aggregateAmountExcludesCertainSharesFlag>N</aggregateAmountExcludesCertainSharesFlag>
      <classPercent>11.38</classPercent>
      <typeOfReportingPerson>IA</typeOfReportingPerson>
    </coverPageHeaderReportingPersonDetails>
    <coverPageHeaderReportingPersonDetails>


      <reportingPersonName>CONESTOGA FUNDS</reportingPersonName>
      <citizenshipOrOrganization>DE</citizenshipOrOrganization>
      <reportingPersonBeneficiallyOwnedNumberOfShares>
        <soleVotingPower>413985.00</soleVotingPower>
        <sharedVotingPower>0.00</sharedVotingPower>
        <soleDispositivePower>413985.00</soleDispositivePower>
        <sharedDispositivePower>0.00</sharedDispositivePower>
      </reportingPersonBeneficiallyOwnedNumberOfShares>
      <reportingPersonBeneficiallyOwnedAggregateNumberOfShares>413984.00</reportingPersonBeneficiallyOwnedAggregateNumberOfShares>
      <aggregateAmountExcludesCertainSharesFlag>N</aggregateAmountExcludesCertainSharesFlag>
      <classPercent>7.62</classPercent>
      <typeOfReportingPerson>IV</typeOfReportingPerson>
    </coverPageHeaderReportingPersonDetails>
    <items>
      <item1>
        <issuerName>MESA LABORATORIES INC /CO/</issuerName>
        <issuerPrincipalExecutiveOfficeAddress>12100 West Sixth Avenue LAKEWOOD, COLORADO 80228</issuerPrincipalExecutiveOfficeAddress>
      </item1>
      <item2>
        <filingPersonName>Conestoga Capital Advisors

CONESTOGA FUNDS</filingPersonName>
        <principalBusinessOfficeOrResidenceAddress>550 E. SWEDESFORD ROAD
SUITE 120
WAYNE, Pennsylvania
19087</principalBusinessOfficeOrResidenceAddress>
        <citizenship>Conestoga Capital Advisors - DELAWARE

CONESTOGA FUNDS - DELAWARE</citizenship>
      </item2>
      <item3>
        <notApplicableFlag>N</notApplicableFlag>
        <typeOfPersonFiling>IV</typeOfPersonFiling>
        <typeOfPersonFiling>IA</typeOfPersonFiling>
      </item3>
      <item4>
        <amountBeneficiallyOwned>Conestoga Capital Advisors 618,111
Conestoga Small Cap Fund 413,985</amountBeneficiallyOwned>
        <classPercent>11.38</classPercent>
        <numberOfSharesPersonHas>
          <solePowerOrDirectToVote>Conestoga Capital Advisors - 573037

CONESTOGA FUNDS - 413985</solePowerOrDirectToVote>
          <sharedPowerOrDirectToVote>Conestoga Capital Advisors - 0

CONESTOGA FUNDS - 0</sharedPowerOrDirectToVote>
          <solePowerOrDirectToDispose>Conestoga Capital Advisors - 618111

CONESTOGA FUNDS - 413985</solePowerOrDirectToDispose>
          <sharedPowerOrDirectToDispose>Conestoga Capital Advisors - 0

CONESTOGA FUNDS - 0</sharedPowerOrDirectToDispose>
        </numberOfSharesPersonHas>
      </item4>
      <item5>
        <notApplicableFlag>Y</notApplicableFlag>
      </item5>
      <item6>
        <notApplicableFlag>Y</notApplicableFlag>
      </item6>
      <item7>
        <notApplicableFlag>Y</notApplicableFlag>
      </item7>
      <item8>
        <notApplicableFlag>Y</notApplicableFlag>
      </item8>
      <item9>
        <notApplicableFlag>Y</notApplicableFlag>
      </item9>
      <item10>
        <notApplicableFlag>N</notApplicableFlag>
        <certifications>By signing below I certify that, to the best of my knowledge and belief, the securities referred to above were acquired and are held in the ordinary course of business and were not acquired and are not held for the purpose of or with the effect of changing or influencing the control of the issuer of the securities and were not acquired and are not held in connection with or as a participant in any transaction having that purpose or effect, other than activities solely in connection with a nomination under ?? 240.14a-11.</certifications>
      </item10>
    </items>
    <signatureInformation>
      <reportingPersonName>Conestoga Capital Advisors</reportingPersonName>
      <signatureDetails>
        <signature>Duane R. D'Orazio</signature>
        <title>Managing Partner</title>
        <date>01/09/2025</date>
      </signatureDetails>
    </signatureInformation>
    <signatureInformation>
      <reportingPersonName>CONESTOGA FUNDS</reportingPersonName>
      <signatureDetails>
        <signature>Duane R. D'Orazio</signature>
        <title>Managing Partner</title>
        <date>01/09/2025</date>
      </signatureDetails>
    </signatureInformation>
  </formData>
</edgarSubmission>