﻿<?xml version="1.0" encoding="utf-8"?>
<Return xmlns="http://www.irs.gov/efile" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.irs.gov/efile" returnVersion="2024v5.1">
  <ReturnHeader binaryAttachmentCnt="0">
    <ReturnTs>2025-04-02T08:11:40-05:00</ReturnTs>
    <TaxPeriodEndDt>2024-12-31</TaxPeriodEndDt>
    <PreparerFirmGrp>
      <PreparerFirmEIN>131577780</PreparerFirmEIN>
      <PreparerFirmName>
        <BusinessNameLine1Txt>SCHULTHEIS &amp; PANETTIERI LLP</BusinessNameLine1Txt>
      </PreparerFirmName>
      <PreparerUSAddress>
        <AddressLine1Txt>450 WIRELESS BLVD</AddressLine1Txt>
        <CityNm>HAUPPAUGE</CityNm>
        <StateAbbreviationCd>NY</StateAbbreviationCd>
        <ZIPCd>11788</ZIPCd>
      </PreparerUSAddress>
    </PreparerFirmGrp>
    <ReturnTypeCd>990EZ</ReturnTypeCd>
    <TaxPeriodBeginDt>2024-01-01</TaxPeriodBeginDt>
    <Filer>
      <EIN>205086884</EIN>
      <BusinessName>
        <BusinessNameLine1Txt>LABORERS LOCAL 66 CHARITABLE CORP</BusinessNameLine1Txt>
      </BusinessName>
      <BusinessNameControlTxt>LABO</BusinessNameControlTxt>
      <PhoneNum>6312491110</PhoneNum>
      <USAddress>
        <AddressLine1Txt>1600 WALT WHITMAN ROAD</AddressLine1Txt>
        <CityNm>MELVILLE</CityNm>
        <StateAbbreviationCd>NY</StateAbbreviationCd>
        <ZIPCd>11747</ZIPCd>
      </USAddress>
    </Filer>
    <BusinessOfficerGrp>
      <PersonNm>ALLEN MARMOR</PersonNm>
      <PersonTitleTxt>PRESIDENT</PersonTitleTxt>
      <PhoneNum>6312491110</PhoneNum>
      <SignatureDt>2025-04-02</SignatureDt>
      <DiscussWithPaidPreparerInd>1</DiscussWithPaidPreparerInd>
    </BusinessOfficerGrp>
    <IRSResponsiblePrtyInfoCurrInd>1</IRSResponsiblePrtyInfoCurrInd>
    <PreparerPersonGrp>
      <PreparerPersonNm>CAROL WESTFALL</PreparerPersonNm>
      <PTIN>P00539069</PTIN>
      <PhoneNum>6312734778</PhoneNum>
    </PreparerPersonGrp>
    <TaxYr>2024</TaxYr>
    <BuildTS>2025-03-06 01:10:19Z</BuildTS>
  </ReturnHeader>
  <ReturnData documentCnt="5">
    <IRS990EZ documentId="RetDoc1234200001" referenceDocumentId="RetDoc1051800001">
      <MethodOfAccountingCashInd>X</MethodOfAccountingCashInd>
      <WebsiteAddressTxt>N/A</WebsiteAddressTxt>
      <Organization501c3Ind referenceDocumentId="RetDoc1039100001">X</Organization501c3Ind>
      <TypeOfOrganizationCorpInd>X</TypeOfOrganizationCorpInd>
      <GrossReceiptsAmt>159419</GrossReceiptsAmt>
      <InfoInScheduleOPartIInd>X</InfoInScheduleOPartIInd>
      <ContributionsGiftsGrantsEtcAmt>66543</ContributionsGiftsGrantsEtcAmt>
      <InvestmentIncomeAmt>11299</InvestmentIncomeAmt>
      <FundraisingGrossIncomeAmt referenceDocumentId="RetDoc1041300001" fndrsngEventContriPrevRptAmt="62543">81577</FundraisingGrossIncomeAmt>
      <SpecialEventsDirectExpensesAmt>81577</SpecialEventsDirectExpensesAmt>
      <SpecialEventsNetIncomeLossAmt>0</SpecialEventsNetIncomeLossAmt>
      <TotalRevenueAmt>77842</TotalRevenueAmt>
      <FeesAndOtherPymtToIndCntrctAmt>3000</FeesAndOtherPymtToIndCntrctAmt>
      <OtherExpensesTotalAmt>74448</OtherExpensesTotalAmt>
      <TotalExpensesAmt>77448</TotalExpensesAmt>
      <ExcessOrDeficitForYearAmt>394</ExcessOrDeficitForYearAmt>
      <NetAssetsOrFundBalancesBOYAmt>361510</NetAssetsOrFundBalancesBOYAmt>
      <OtherChangesInNetAssetsAmt>0</OtherChangesInNetAssetsAmt>
      <NetAssetsOrFundBalancesEOYAmt>361904</NetAssetsOrFundBalancesEOYAmt>
      <CashSavingsAndInvestmentsGrp>
        <BOYAmt>361510</BOYAmt>
        <EOYAmt>361904</EOYAmt>
      </CashSavingsAndInvestmentsGrp>
      <Form990TotalAssetsGrp>
        <BOYAmt>361510</BOYAmt>
        <EOYAmt>361904</EOYAmt>
      </Form990TotalAssetsGrp>
      <SumOfTotalLiabilitiesGrp>
        <BOYAmt>0</BOYAmt>
        <EOYAmt>0</EOYAmt>
      </SumOfTotalLiabilitiesGrp>
      <NetAssetsOrFundBalancesGrp>
        <BOYAmt>361510</BOYAmt>
        <EOYAmt>361904</EOYAmt>
      </NetAssetsOrFundBalancesGrp>
      <InfoInScheduleOPartIIIInd>X</InfoInScheduleOPartIIIInd>
      <PrimaryExemptPurposeTxt>THE PURPOSE OF THE CHARITABLE CORP IS TO PROVIDE FINANCIAL ASSISTANCE TO OTHER CHARITABLE ORGANIZATIONS EXEMPT FROM FEDERAL INCOME TAX UNDER SECTION 501(C)(3); PROVIDE PROGRAMS AND EVENTS TO BENEFIT THE WELFARE OF PEOPLE IN THE LOCAL AREA, OR FOR OTHER PROGRAMS AND EVENTS FURTHERING THE PURPOSES OF THE CHARITABLE CORP; PROVIDE FINANCIAL AID AND ASSISTANCE TO ANY NEEDY AND DESERVING INDIVIDUAL OR INDIVIDUALS WITHOUT REGARD TO RACE, NATIONALITY, SEX, COLOR, OR CREED; DOING ANY OTHER ACT OR THING INCIDENTAL TO OR CONNECTED WITH THE FOREGOING PURPOSES OF IN ADVANCEMENT THEREOF, BOTH AS A SEPARATE ORGANIZATION AND IN COOPERATION WITH OTHER TAX EXEMPT ORGANIZATIONS. ORGANIZATION MAKES CHARITABLE CONTRIBUTIONS TO PROGRAM AND EVENTS THAT BENEFIT THE WELFARE OF THE PEOPLES ON LOCAL AREAS.</PrimaryExemptPurposeTxt>
      <ProgramSrvcAccomplishmentGrp>
        <DescriptionProgramSrvcAccomTxt>THE PURPOSE OF THE CHARITABLE CORP IS TO PROVIDE FINANCIAL ASSISTANCE TO OTHER CHARITABLE ORGANIZATIONS EXEMPT FROM FEDERAL INCOME TAX UNDER SECTION 501(C)(3); PROVIDE PROGRAMS AND EVENTS TO BENEFIT THE WELFARE OF PEOPLE IN THE LOCAL AREA, OR FOR OTHER PROGRAMS AND EVENTS FURTHERING THE PURPOSES OF THE CHARITABLE CORP; PROVIDE FINANCIAL AID AND ASSISTANCE TO ANY NEEDY AND DESERVING INDIVIDUAL OR INDIVIDUALS WITHOUT REGARD TO RACE, NATIONALITY, SEX, COLOR, OR CREED; DOING ANY OTHER ACT OR THING INCIDENTAL TO OR CONNECTED WITH THE FOREGOING PURPOSES OF IN ADVANCEMENT THEREOF, BOTH AS A SEPARATE ORGANIZATION AND IN COOPERATION WITH OTHER TAX EXEMPT ORGANIZATIONS. ORGANIZATION MAKES CHARITABLE CONTRIBUTIONS TO PROGRAM AND EVENTS THAT BENEFIT THE WELFARE OF THE PEOPLES ON LOCAL AREAS.</DescriptionProgramSrvcAccomTxt>
        <GrantsAndAllocationsAmt>0</GrantsAndAllocationsAmt>
        <ProgramServiceExpensesAmt>73078</ProgramServiceExpensesAmt>
      </ProgramSrvcAccomplishmentGrp>
      <TotalProgramServiceExpensesAmt>73078</TotalProgramServiceExpensesAmt>
      <OfficerDirectorTrusteeEmplGrp>
        <PersonNm>ALLEN MARMOR</PersonNm>
        <TitleTxt>PRES &amp; TRUSTEE</TitleTxt>
        <AverageHrsPerWkDevotedToPosRt>1.00</AverageHrsPerWkDevotedToPosRt>
        <CompensationAmt>0</CompensationAmt>
        <EmployeeBenefitProgramAmt>0</EmployeeBenefitProgramAmt>
        <ExpenseAccountOtherAllwncAmt>0</ExpenseAccountOtherAllwncAmt>
      </OfficerDirectorTrusteeEmplGrp>
      <OfficerDirectorTrusteeEmplGrp>
        <PersonNm>VINCENT ALU</PersonNm>
        <TitleTxt>VP &amp; TRUSTEE</TitleTxt>
        <AverageHrsPerWkDevotedToPosRt>1.00</AverageHrsPerWkDevotedToPosRt>
        <CompensationAmt>0</CompensationAmt>
        <EmployeeBenefitProgramAmt>0</EmployeeBenefitProgramAmt>
        <ExpenseAccountOtherAllwncAmt>0</ExpenseAccountOtherAllwncAmt>
      </OfficerDirectorTrusteeEmplGrp>
      <OfficerDirectorTrusteeEmplGrp>
        <PersonNm>SHANNON PURCELL</PersonNm>
        <TitleTxt>SEC/TREAS/TRUSTEE</TitleTxt>
        <AverageHrsPerWkDevotedToPosRt>1.00</AverageHrsPerWkDevotedToPosRt>
        <CompensationAmt>0</CompensationAmt>
        <EmployeeBenefitProgramAmt>0</EmployeeBenefitProgramAmt>
        <ExpenseAccountOtherAllwncAmt>0</ExpenseAccountOtherAllwncAmt>
      </OfficerDirectorTrusteeEmplGrp>
      <ActivitiesNotPreviouslyRptInd>0</ActivitiesNotPreviouslyRptInd>
      <ChgMadeToOrgnzngDocNotRptInd>0</ChgMadeToOrgnzngDocNotRptInd>
      <OrganizationHadUBIInd>0</OrganizationHadUBIInd>
      <SubjectToProxyTaxInd>0</SubjectToProxyTaxInd>
      <OrganizationDissolvedEtcInd>0</OrganizationDissolvedEtcInd>
      <DirectIndirectPltclExpendAmt>0</DirectIndirectPltclExpendAmt>
      <MadeLoansToFromOfficersInd>0</MadeLoansToFromOfficersInd>
      <TaxImposedUnderIRC4911Amt>0</TaxImposedUnderIRC4911Amt>
      <TaxImposedUnderIRC4912Amt>0</TaxImposedUnderIRC4912Amt>
      <TaxImposedUnderIRC4955Amt>0</TaxImposedUnderIRC4955Amt>
      <EngagedInExcessBenefitTransInd>0</EngagedInExcessBenefitTransInd>
      <TaxImposedOnOrganizationMgrAmt>0</TaxImposedOnOrganizationMgrAmt>
      <TaxReimbursedByOrganizationAmt>0</TaxReimbursedByOrganizationAmt>
      <ProhibitedTaxShelterTransInd>0</ProhibitedTaxShelterTransInd>
      <StatesWhereCopyOfReturnIsFldCd>NY</StatesWhereCopyOfReturnIsFldCd>
      <BooksInCareOfDetail>
        <BusinessName>
          <BusinessNameLine1Txt>SHANNON PURCELL</BusinessNameLine1Txt>
        </BusinessName>
        <USAddress>
          <AddressLine1Txt>1600 WALT WHITMAN ROAD</AddressLine1Txt>
          <CityNm>MELVILLE</CityNm>
          <StateAbbreviationCd>NY</StateAbbreviationCd>
          <ZIPCd>117473088</ZIPCd>
        </USAddress>
        <PhoneNum>6312491110</PhoneNum>
      </BooksInCareOfDetail>
      <ForeignFinancialAccountInd>0</ForeignFinancialAccountInd>
      <ForeignOfficeInd>0</ForeignOfficeInd>
      <DonorAdvisedFndsInd>0</DonorAdvisedFndsInd>
      <OperateHospitalInd>0</OperateHospitalInd>
      <TanningServicesProvidedInd>0</TanningServicesProvidedInd>
      <RelatedOrganizationCtrlEntInd>0</RelatedOrganizationCtrlEntInd>
      <PoliticalCampaignActyInd>0</PoliticalCampaignActyInd>
      <LobbyingActivitiesInd>0</LobbyingActivitiesInd>
      <SchoolOperatingInd>0</SchoolOperatingInd>
      <TrnsfrExmptNonChrtblRltdOrgInd>0</TrnsfrExmptNonChrtblRltdOrgInd>
      <PartVIOfCompOfHghstPdEmplTxt>NONE</PartVIOfCompOfHghstPdEmplTxt>
      <PartVIHghstPdCntrctProfSrvcTxt>NONE</PartVIHghstPdCntrctProfSrvcTxt>
      <FiledScheduleAInd>1</FiledScheduleAInd>
    </IRS990EZ>
    <IRS990ScheduleA documentId="RetDoc1039100001">
      <PublicOrganization170Ind>X</PublicOrganization170Ind>
      <GiftsGrantsContriRcvd170Grp>
        <CurrentTaxYearMinus4YearsAmt>94625</CurrentTaxYearMinus4YearsAmt>
        <CurrentTaxYearMinus3YearsAmt>81905</CurrentTaxYearMinus3YearsAmt>
        <CurrentTaxYearMinus2YearsAmt>143418</CurrentTaxYearMinus2YearsAmt>
        <CurrentTaxYearMinus1YearAmt>143245</CurrentTaxYearMinus1YearAmt>
        <CurrentTaxYearAmt>148120</CurrentTaxYearAmt>
        <TotalAmt>611313</TotalAmt>
      </GiftsGrantsContriRcvd170Grp>
      <TotalCalendarYear170Grp>
        <CurrentTaxYearMinus4YearsAmt>94625</CurrentTaxYearMinus4YearsAmt>
        <CurrentTaxYearMinus3YearsAmt>81905</CurrentTaxYearMinus3YearsAmt>
        <CurrentTaxYearMinus2YearsAmt>143418</CurrentTaxYearMinus2YearsAmt>
        <CurrentTaxYearMinus1YearAmt>143245</CurrentTaxYearMinus1YearAmt>
        <CurrentTaxYearAmt>148120</CurrentTaxYearAmt>
        <TotalAmt>611313</TotalAmt>
      </TotalCalendarYear170Grp>
      <SubstantialContributorsTotAmt>37485</SubstantialContributorsTotAmt>
      <PublicSupportTotal170Amt>573828</PublicSupportTotal170Amt>
      <GrossInvestmentIncome170Grp>
        <CurrentTaxYearMinus4YearsAmt>1930</CurrentTaxYearMinus4YearsAmt>
        <CurrentTaxYearMinus3YearsAmt>307</CurrentTaxYearMinus3YearsAmt>
        <CurrentTaxYearMinus2YearsAmt>2172</CurrentTaxYearMinus2YearsAmt>
        <CurrentTaxYearMinus1YearAmt>10237</CurrentTaxYearMinus1YearAmt>
        <CurrentTaxYearAmt>11299</CurrentTaxYearAmt>
        <TotalAmt>25945</TotalAmt>
      </GrossInvestmentIncome170Grp>
      <TotalSupportAmt>637258</TotalSupportAmt>
      <PublicSupportCY170Pct>0.90050</PublicSupportCY170Pct>
      <PublicSupportPY170Pct>0.97040</PublicSupportPY170Pct>
      <ThirtyThrPctSuprtTestsCY170Ind>X</ThirtyThrPctSuprtTestsCY170Ind>
    </IRS990ScheduleA>
    <IRS990ScheduleB documentId="RetDoc1234500001">
      <ContributorInformationGrp>
        <ContributorNum>RESTRICTED</ContributorNum>
        <ContributorBusinessName>
          <BusinessNameLine1>RESTRICTED</BusinessNameLine1>
        </ContributorBusinessName>
        <ContributorUSAddress>
          <AddressLine1>RESTRICTED</AddressLine1>
          <AddressLine2>RESTRICTED</AddressLine2>
          <City>RESTRICTED</City>
          <State>RESTRICTED</State>
          <ZIPCode>RESTRICTED</ZIPCode>
        </ContributorUSAddress>
        <TotalContributionsAmt>RESTRICTED</TotalContributionsAmt>
      </ContributorInformationGrp>
    </IRS990ScheduleB>
    <IRS990ScheduleG documentId="RetDoc1041300001">
      <FundraisingEventInformationGrp>
        <Event1Nm>GOLF OUTING</Event1Nm>
        <GrossReceiptsEvent1Amt>144120</GrossReceiptsEvent1Amt>
        <CharitableContriEvent1Amt>62543</CharitableContriEvent1Amt>
        <GrossRevenueEvent1Amt>81577</GrossRevenueEvent1Amt>
        <NonCashPrizesEvent1Amt>30398</NonCashPrizesEvent1Amt>
        <RentFacilityCostsEvent1Amt>48436</RentFacilityCostsEvent1Amt>
        <OtherDirectExpensesEvent1Amt>2743</OtherDirectExpensesEvent1Amt>
        <GrossReceiptsTotalAmt>144120</GrossReceiptsTotalAmt>
        <CharitableContributionsTotAmt>62543</CharitableContributionsTotAmt>
        <GrossRevenueTotalEventsAmt>81577</GrossRevenueTotalEventsAmt>
        <NonCashPrizesTotalEventsAmt>30398</NonCashPrizesTotalEventsAmt>
        <RentFcltyCostsTotalEventsAmt>48436</RentFcltyCostsTotalEventsAmt>
        <OthDirectExpnssTotalEventsAmt>2743</OthDirectExpnssTotalEventsAmt>
        <DirectExpenseSummaryEventsAmt>81577</DirectExpenseSummaryEventsAmt>
        <NetIncomeSummaryAmt>0</NetIncomeSummaryAmt>
      </FundraisingEventInformationGrp>
    </IRS990ScheduleG>
    <IRS990ScheduleO documentId="RetDoc1051800001">
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990-EZ, PART I, LINE 4 - OTHER INVESTMENT INCOME</FormAndLineReferenceDesc>
        <ExplanationTxt>DESCRIPTION: . AMOUNT: 11,299.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990-EZ, PART I, LINE 16 - OTHER EXPENSES</FormAndLineReferenceDesc>
        <ExplanationTxt>DESCRIPTION: CHARITABLE DONATIONS. AMOUNT: 73,078. DESCRIPTION: INSURANCE. AMOUNT: 1,370. TOTAL TO FORM 990-EZ, LINE 16: 74,448.</ExplanationTxt>
      </SupplementalInformationDetail>
    </IRS990ScheduleO>
  </ReturnData>
</Return>