﻿<?xml version="1.0" encoding="utf-8"?>
<Return xmlns="http://www.irs.gov/efile" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" returnVersion="2025v4.0">
  <ReturnHeader binaryAttachmentCnt="0">
    <ReturnTs>2026-02-23T16:03:25-05:00</ReturnTs>
    <TaxPeriodEndDt>2025-12-31</TaxPeriodEndDt>
    <PreparerFirmGrp>
      <PreparerFirmEIN>833033790</PreparerFirmEIN>
      <PreparerFirmName>
        <BusinessNameLine1Txt>DG PERRY PLLC</BusinessNameLine1Txt>
      </PreparerFirmName>
      <PreparerUSAddress>
        <AddressLine1Txt>6745 LONGSHORE STREET STE 240</AddressLine1Txt>
        <CityNm>DUBLIN</CityNm>
        <StateAbbreviationCd>OH</StateAbbreviationCd>
        <ZIPCd>43017</ZIPCd>
      </PreparerUSAddress>
    </PreparerFirmGrp>
    <ReturnTypeCd>990EZ</ReturnTypeCd>
    <TaxPeriodBeginDt>2025-01-01</TaxPeriodBeginDt>
    <Filer>
      <EIN>901077587</EIN>
      <BusinessName>
        <BusinessNameLine1Txt>OHIO SOCIETY OF FIRE SERVICE</BusinessNameLine1Txt>
        <BusinessNameLine2Txt>INSTRUCTORS</BusinessNameLine2Txt>
      </BusinessName>
      <BusinessNameControlTxt>OHIO</BusinessNameControlTxt>
      <PhoneNum>6144106322</PhoneNum>
      <USAddress>
        <AddressLine1Txt>450 W WILSON BRIDGE RD SUITE 150</AddressLine1Txt>
        <CityNm>WORTHINGTON</CityNm>
        <StateAbbreviationCd>OH</StateAbbreviationCd>
        <ZIPCd>43085</ZIPCd>
      </USAddress>
    </Filer>
    <BusinessOfficerGrp>
      <PersonNm>CHARLIE DIXON</PersonNm>
      <PersonTitleTxt>PRESIDENT</PersonTitleTxt>
      <PhoneNum>6142060946</PhoneNum>
      <SignatureDt>2026-02-16</SignatureDt>
      <DiscussWithPaidPreparerInd>true</DiscussWithPaidPreparerInd>
    </BusinessOfficerGrp>
    <PreparerPersonGrp>
      <PreparerPersonNm>JASON A MONRO CPA</PreparerPersonNm>
      <PTIN>P01813051</PTIN>
      <PhoneNum>6144311040</PhoneNum>
      <PreparationDt>2026-02-16</PreparationDt>
    </PreparerPersonGrp>
    <TaxYr>2025</TaxYr>
    <BuildTS>2025-03-06 01:10:19Z</BuildTS>
  </ReturnHeader>
  <ReturnData documentCnt="3">
    <IRS990EZ documentId="RetDoc1" referenceDocumentId="RetDoc2">
      <MethodOfAccountingCashInd>X</MethodOfAccountingCashInd>
      <ScheduleBNotRequiredInd>X</ScheduleBNotRequiredInd>
      <WebsiteAddressTxt>WWW.OSFSI.ORG</WebsiteAddressTxt>
      <Organization501c3Ind referenceDocumentId="RetDoc3">X</Organization501c3Ind>
      <TypeOfOrganizationCorpInd>X</TypeOfOrganizationCorpInd>
      <GrossReceiptsAmt>7405</GrossReceiptsAmt>
      <InfoInScheduleOPartIInd>X</InfoInScheduleOPartIInd>
      <ContributionsGiftsGrantsEtcAmt>7405</ContributionsGiftsGrantsEtcAmt>
      <TotalRevenueAmt>7405</TotalRevenueAmt>
      <FeesAndOtherPymtToIndCntrctAmt>5610</FeesAndOtherPymtToIndCntrctAmt>
      <OtherExpensesTotalAmt>3001</OtherExpensesTotalAmt>
      <TotalExpensesAmt>8611</TotalExpensesAmt>
      <ExcessOrDeficitForYearAmt>-1206</ExcessOrDeficitForYearAmt>
      <NetAssetsOrFundBalancesBOYAmt>17358</NetAssetsOrFundBalancesBOYAmt>
      <NetAssetsOrFundBalancesEOYAmt>16152</NetAssetsOrFundBalancesEOYAmt>
      <InfoInScheduleOPartIIInd>X</InfoInScheduleOPartIIInd>
      <CashSavingsAndInvestmentsGrp>
        <BOYAmt>20053</BOYAmt>
        <EOYAmt>18847</EOYAmt>
      </CashSavingsAndInvestmentsGrp>
      <Form990TotalAssetsGrp>
        <BOYAmt>20053</BOYAmt>
        <EOYAmt>18847</EOYAmt>
      </Form990TotalAssetsGrp>
      <SumOfTotalLiabilitiesGrp>
        <BOYAmt>2695</BOYAmt>
        <EOYAmt>2695</EOYAmt>
      </SumOfTotalLiabilitiesGrp>
      <NetAssetsOrFundBalancesGrp>
        <BOYAmt>17358</BOYAmt>
        <EOYAmt>16152</EOYAmt>
      </NetAssetsOrFundBalancesGrp>
      <InfoInScheduleOPartIIIInd>X</InfoInScheduleOPartIIIInd>
      <PrimaryExemptPurposeTxt>TO PROVIDE EFFECTIVE AND CONTINUOUS LEADERSHIP AND TRAINING OF FIRE SERVICE PERSONNEL.</PrimaryExemptPurposeTxt>
      <ProgramSrvcAccomplishmentGrp>
        <DescriptionProgramSrvcAccomTxt>TO PROMOTE ACCEPTANCE AND UNDERSTANDING OF EDUCATION AND TRAINING IN THIS FIELD. TO HOLD PERIODIC CONFERENCES FOR THE STUDY OF TRAINING PROBLEMS AND TO PUBLISH PAPERS, REPORTS AND DISCUSSIONS THEREOF. TO ENCOURAGE RESEARCH AND SPECIAL STUDIES, TO DEVELOP AND REVIEW TRAINING PROGRAMS, MATERIALS, AND PROCEDURES. TO COOPERATE WITH OTHER ASSOCIATE SOCIETIES AND EDUCATIONAL INSTITUTIONS IN CARRYING OUT THESE OBJECTIVES.</DescriptionProgramSrvcAccomTxt>
        <ProgramServiceExpensesAmt>3001</ProgramServiceExpensesAmt>
      </ProgramSrvcAccomplishmentGrp>
      <TotalProgramServiceExpensesAmt>3001</TotalProgramServiceExpensesAmt>
      <OfficerDirectorTrusteeEmplGrp>
        <PersonNm>CHARLIE DIXON</PersonNm>
        <TitleTxt>PRESIDENT</TitleTxt>
        <AverageHrsPerWkDevotedToPosRt>3.00</AverageHrsPerWkDevotedToPosRt>
        <CompensationAmt>0</CompensationAmt>
      </OfficerDirectorTrusteeEmplGrp>
      <OfficerDirectorTrusteeEmplGrp>
        <PersonNm>JEREMY LINN</PersonNm>
        <TitleTxt>VICE PRESIDE</TitleTxt>
        <AverageHrsPerWkDevotedToPosRt>3.00</AverageHrsPerWkDevotedToPosRt>
        <CompensationAmt>0</CompensationAmt>
      </OfficerDirectorTrusteeEmplGrp>
      <OfficerDirectorTrusteeEmplGrp>
        <PersonNm>THOMAS D BENTLEY</PersonNm>
        <TitleTxt>SECRETARY TR</TitleTxt>
        <AverageHrsPerWkDevotedToPosRt>3.00</AverageHrsPerWkDevotedToPosRt>
        <CompensationAmt>0</CompensationAmt>
      </OfficerDirectorTrusteeEmplGrp>
      <OfficerDirectorTrusteeEmplGrp>
        <PersonNm>JAMES WESTFALL</PersonNm>
        <TitleTxt>SE AREA DIRE</TitleTxt>
        <AverageHrsPerWkDevotedToPosRt>1.00</AverageHrsPerWkDevotedToPosRt>
        <CompensationAmt>0</CompensationAmt>
      </OfficerDirectorTrusteeEmplGrp>
      <OfficerDirectorTrusteeEmplGrp>
        <PersonNm>KEN LEDFORD</PersonNm>
        <TitleTxt>NE AREA DIRE</TitleTxt>
        <AverageHrsPerWkDevotedToPosRt>1.00</AverageHrsPerWkDevotedToPosRt>
        <CompensationAmt>0</CompensationAmt>
      </OfficerDirectorTrusteeEmplGrp>
      <OfficerDirectorTrusteeEmplGrp>
        <PersonNm>JASON FISHER</PersonNm>
        <TitleTxt>NW AREA DIRE</TitleTxt>
        <AverageHrsPerWkDevotedToPosRt>1.00</AverageHrsPerWkDevotedToPosRt>
        <CompensationAmt>0</CompensationAmt>
      </OfficerDirectorTrusteeEmplGrp>
      <OfficerDirectorTrusteeEmplGrp>
        <PersonNm>BRIAN LECIEJEWSKI</PersonNm>
        <TitleTxt>SW AREA DIRE</TitleTxt>
        <AverageHrsPerWkDevotedToPosRt>1.00</AverageHrsPerWkDevotedToPosRt>
        <CompensationAmt>0</CompensationAmt>
      </OfficerDirectorTrusteeEmplGrp>
      <OfficerDirectorTrusteeEmplGrp>
        <PersonNm>SCOTT KING</PersonNm>
        <TitleTxt>AREA DIRECTO</TitleTxt>
        <AverageHrsPerWkDevotedToPosRt>1.00</AverageHrsPerWkDevotedToPosRt>
        <CompensationAmt>0</CompensationAmt>
      </OfficerDirectorTrusteeEmplGrp>
      <ActivitiesNotPreviouslyRptInd>false</ActivitiesNotPreviouslyRptInd>
      <ChgMadeToOrgnzngDocNotRptInd>false</ChgMadeToOrgnzngDocNotRptInd>
      <OrganizationHadUBIInd>false</OrganizationHadUBIInd>
      <SubjectToProxyTaxInd>false</SubjectToProxyTaxInd>
      <OrganizationDissolvedEtcInd>false</OrganizationDissolvedEtcInd>
      <Form1120PolFiledInd>false</Form1120PolFiledInd>
      <MadeLoansToFromOfficersInd>false</MadeLoansToFromOfficersInd>
      <EngagedInExcessBenefitTransInd>false</EngagedInExcessBenefitTransInd>
      <ProhibitedTaxShelterTransInd>false</ProhibitedTaxShelterTransInd>
      <StatesWhereCopyOfReturnIsFldCd>OH</StatesWhereCopyOfReturnIsFldCd>
      <BooksInCareOfDetail>
        <PersonNm>CHARLIE DIXON</PersonNm>
        <USAddress>
          <AddressLine1Txt>450 W WILSON BRIDGE ROAD SUITE 15</AddressLine1Txt>
          <CityNm>WORTHINGTON</CityNm>
          <StateAbbreviationCd>OH</StateAbbreviationCd>
          <ZIPCd>43085</ZIPCd>
        </USAddress>
        <PhoneNum>6144106322</PhoneNum>
      </BooksInCareOfDetail>
      <ForeignFinancialAccountInd>false</ForeignFinancialAccountInd>
      <ForeignOfficeInd>false</ForeignOfficeInd>
      <DonorAdvisedFndsInd>false</DonorAdvisedFndsInd>
      <OperateHospitalInd>false</OperateHospitalInd>
      <TanningServicesProvidedInd>false</TanningServicesProvidedInd>
      <RelatedOrganizationCtrlEntInd>false</RelatedOrganizationCtrlEntInd>
      <TransactionWithControlEntInd>false</TransactionWithControlEntInd>
      <PoliticalCampaignActyInd>false</PoliticalCampaignActyInd>
      <LobbyingActivitiesInd>false</LobbyingActivitiesInd>
      <SchoolOperatingInd>false</SchoolOperatingInd>
      <TrnsfrExmptNonChrtblRltdOrgInd>false</TrnsfrExmptNonChrtblRltdOrgInd>
      <PartVIOfCompOfHghstPdEmplTxt>NONE</PartVIOfCompOfHghstPdEmplTxt>
      <PartVIHghstPdCntrctProfSrvcTxt>NONE</PartVIHghstPdCntrctProfSrvcTxt>
      <FiledScheduleAInd>true</FiledScheduleAInd>
    </IRS990EZ>
    <IRS990ScheduleA documentId="RetDoc3">
      <PubliclySupportedOrg509a2Ind>X</PubliclySupportedOrg509a2Ind>
      <GiftsGrantsContrisRcvd509Grp>
        <CurrentTaxYearMinus4YearsAmt>5972</CurrentTaxYearMinus4YearsAmt>
        <CurrentTaxYearMinus3YearsAmt>11197</CurrentTaxYearMinus3YearsAmt>
        <CurrentTaxYearMinus2YearsAmt>7704</CurrentTaxYearMinus2YearsAmt>
        <CurrentTaxYearMinus1YearAmt>11012</CurrentTaxYearMinus1YearAmt>
        <CurrentTaxYearAmt>7405</CurrentTaxYearAmt>
        <TotalAmt>43290</TotalAmt>
      </GiftsGrantsContrisRcvd509Grp>
      <GrossReceiptsAdmissionsGrp>
        <CurrentTaxYearMinus3YearsAmt>1000</CurrentTaxYearMinus3YearsAmt>
        <CurrentTaxYearMinus2YearsAmt>9249</CurrentTaxYearMinus2YearsAmt>
        <CurrentTaxYearMinus1YearAmt>6900</CurrentTaxYearMinus1YearAmt>
        <TotalAmt>17149</TotalAmt>
      </GrossReceiptsAdmissionsGrp>
      <Total509Grp>
        <CurrentTaxYearMinus4YearsAmt>5972</CurrentTaxYearMinus4YearsAmt>
        <CurrentTaxYearMinus3YearsAmt>12197</CurrentTaxYearMinus3YearsAmt>
        <CurrentTaxYearMinus2YearsAmt>16953</CurrentTaxYearMinus2YearsAmt>
        <CurrentTaxYearMinus1YearAmt>17912</CurrentTaxYearMinus1YearAmt>
        <CurrentTaxYearAmt>7405</CurrentTaxYearAmt>
        <TotalAmt>60439</TotalAmt>
      </Total509Grp>
      <PublicSupportTotal509Amt>60439</PublicSupportTotal509Amt>
      <TotalSupportCalendarYearGrp>
        <CurrentTaxYearMinus4YearsAmt>5972</CurrentTaxYearMinus4YearsAmt>
        <CurrentTaxYearMinus3YearsAmt>12197</CurrentTaxYearMinus3YearsAmt>
        <CurrentTaxYearMinus2YearsAmt>16953</CurrentTaxYearMinus2YearsAmt>
        <CurrentTaxYearMinus1YearAmt>17912</CurrentTaxYearMinus1YearAmt>
        <CurrentTaxYearAmt>7405</CurrentTaxYearAmt>
        <TotalAmt>60439</TotalAmt>
      </TotalSupportCalendarYearGrp>
      <PublicSupportCY509Pct>1.00000</PublicSupportCY509Pct>
      <PublicSupportPY509Pct>1.00000</PublicSupportPY509Pct>
      <InvestmentIncomeCYPct>0.00000</InvestmentIncomeCYPct>
      <InvestmentIncomePYPct>0.00000</InvestmentIncomePYPct>
      <ThirtyThrPctSuprtTestsCY509Ind>X</ThirtyThrPctSuprtTestsCY509Ind>
    </IRS990ScheduleA>
    <IRS990ScheduleO documentId="RetDoc2">
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990-EZ, PART I, LINE 16</FormAndLineReferenceDesc>
        <ExplanationTxt>EXPENSES SUPPLIES 529 INSURANCE 2,114 PAYPAL 99 WEBSITE 259 TOTAL 3,001</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990-EZ, PART II, LINE 24</FormAndLineReferenceDesc>
        <ExplanationTxt>OFFICE EQUIPMENT 2,254 2,254 LESS ACCUMULATED DEPRECIATION 2,254 2,254 TOTAL 0 0</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990-EZ, PART II, LINE 26</FormAndLineReferenceDesc>
        <ExplanationTxt>GRANTS PAYABLE 2,695 2,695</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990-EZ, PART III</FormAndLineReferenceDesc>
        <ExplanationTxt>TO PROVIDE EFFECTIVE AND CONTINUOUS LEADERSHIP AND TRAINING OF FIRE SERVICE PERSONNEL.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990-EZ, PART III, LINE 28</FormAndLineReferenceDesc>
        <ExplanationTxt>TO PROMOTE ACCEPTANCE AND UNDERSTANDING OF EDUCATION AND TRAINING IN THIS FIELD. TO HOLD PERIODIC CONFERENCES FOR THE STUDY OF TRAINING PROBLEMS AND TO PUBLISH PAPERS, REPORTS AND DISCUSSIONS THEREOF. TO ENCOURAGE RESEARCH AND SPECIAL STUDIES, TO DEVELOP AND REVIEW TRAINING PROGRAMS, MATERIALS, AND PROCEDURES. TO COOPERATE WITH OTHER ASSOCIATE SOCIETIES AND EDUCATIONAL INSTITUTIONS IN CARRYING OUT THESE OBJECTIVES.</ExplanationTxt>
      </SupplementalInformationDetail>
    </IRS990ScheduleO>
  </ReturnData>
</Return>