Nonprofits in Connecticut
Nonprofits in Connecticut. Browse 26,993 public nonprofit profiles. Review organization identities, available filing years, and their complete CharitySense profiles.
Location refers to headquarters recorded in public sources, not an organization’s service area. Classification describes its reported category and does not assess its effectiveness.
Nonprofit profiles
- National Association of Government Employees
EIN 222563763 · Headquarters: Windsor Locks, CT, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N
- National Association of Government Employees
EIN 237324456 · Headquarters: Groton, CT, US · Public & Societal Benefit · Latest available filing year: 2013 · Primary form: IRS Form 990-N
- National Association of Government Employees
EIN 352370330 · Headquarters: Madison, CT, US · Employment · Latest available filing year: 2012 · Primary form: IRS Form 990-N
- National Association of Government Employees
EIN 392074666 · Headquarters: Orange, CT, US · Employment · Latest available filing year: 2015 · Primary form: IRS Form 990-N
- National Association of Government Employees
EIN 611600231 · Headquarters: CROMWELL, CT, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N
- National Association of Government Employees
EIN 651168134 · Headquarters: BRIDGEPORT, CT, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N
- National Association of Government Employees
EIN 800488331 · Headquarters: Enfield, CT, US · Employment · Latest available filing year: 2012 · Primary form: IRS Form 990-N
- National Association of Government Employees
EIN 900497023 · Headquarters: windsor, CT, US · Education · Latest available filing year: 2013 · Primary form: IRS Form 990-N
- National Association of Government Employees Nage 222
EIN 061305909 · Headquarters: Madison, CT, US · Unknown & Unclassified · Latest available filing year: 2019 · Primary form: IRS Form 990-N
- National Association of Guardsmen Connecticut Chapter
EIN 222802800 · Headquarters: Farmington, CT, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990
- National Association of Hispanic Nu Rses
EIN 272638957 · Headquarters: Trumbull, CT, US · Health Care · Latest available filing year: 2025 · Primary form: IRS Form 990-N
- National Association of Hispanic Nurses
EIN 452400624 · Headquarters: Meriden, CT, US · Health Care · Latest available filing year: 2025 · Primary form: IRS Form 990-N
- National Association of Insurance
EIN 831897029 · Headquarters: Dayville, CT, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N
- National Association of Insurance Women
EIN 061017205 · Headquarters: Dayville, CT, US · Unknown & Unclassified · Latest available filing year: 2023 · Primary form: IRS Form 990-N
- National Association of Insurance Women
EIN 066068715 · Headquarters: Prospect, CT, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N
- National Association of Insurance Women
EIN 066069277 · Headquarters: Wallingford, CT, US · Mutual & Membership Benefit · Latest available filing year: 2016 · Primary form: IRS Form 990-N
- National Association of Insurance Women
EIN 066088825 · Headquarters: CROMWELL, CT, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N
- National Association of Insurance Women
EIN 066108600 · Headquarters: Bethel, CT, US · Mutual & Membership Benefit · Latest available filing year: 2013 · Primary form: IRS Form 990-N
- National Association of Insurance Women
EIN 066108601 · Headquarters: Fairfield, CT, US · Mutual & Membership Benefit · Latest available filing year: 2019 · Primary form: IRS Form 990-N
- National Association of Insurance Women
EIN 383937525 · Headquarters: DANBURY, CT, US · Unknown & Unclassified · Latest available filing year: 2021 · Primary form: IRS Form 990-N
- National Association of Insurance Women
EIN 731327864 · Headquarters: East Haddam, CT, US · Mutual & Membership Benefit · Latest available filing year: 2015 · Primary form: IRS Form 990-N
- National Association of Insurance Women International
EIN 066063542 · Headquarters: Fairfield, CT, US · Mutual & Membership Benefit · Latest available filing year: 2007 · Primary form: IRS Form 990-N
- National Association of Legal Document Preparers Inc
EIN 203470895 · Headquarters: Greenwich, CT, US · Crime & Legal Related · Latest available filing year: 2009 · Primary form: IRS Form 990-N
- National Association of Letter Carriers
EIN 066050764 · Headquarters: Meriden, CT, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990
- National Association of Letter Carriers
EIN 066068649 · Headquarters: NORWALK, CT, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-EZ
- National Association of Letter Carriers
EIN 066099227 · Headquarters: Greenwich, CT, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N
- National Association of Letter Carriers
EIN 066099240 · Headquarters: FAIRFIELD, CT, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-EZ
- National Association of Letter Carriers
EIN 066099277 · Headquarters: Plainfield, CT, US · Employment · Latest available filing year: 2009 · Primary form: IRS Form 990-N
- National Association of Letter Carriers #19
EIN 066069316 · Headquarters: NORTH HAVEN, CT, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990
- National Association of Letter Carriers Auxiliary of USA
EIN 900127935 · Headquarters: East Haven, CT, US · Employment · Latest available filing year: 2016 · Primary form: IRS Form 990-N
- National Association of Letter Carriers Auxiliary of USA
EIN 900420924 · Headquarters: East Haven, CT, US · Employment · Latest available filing year: 2016 · Primary form: IRS Form 990-N
- National Association of Letter Carriers Branch 109
EIN 066099221 · Headquarters: Derby, CT, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-EZ
- National Association of Letter Carriers Branch 32
EIN 066068829 · Headquarters: STRATFORD, CT, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990
- National Association of Letter Carriers NALC 86
EIN 066063016 · Headquarters: East Hartford, CT, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990
- National Association of Medicaid Program Integrity
EIN 363497582 · Headquarters: WEST HARTFORD, CT, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990
- National Association of Miniature Enthusiasts
EIN 942611559 · Headquarters: Milford, CT, US · Recreation & Sports · Latest available filing year: 2008 · Primary form: IRS Form 990-N
- National Association of Negro Busin Ess and Professional Womens C
EIN 061197041 · Headquarters: TRUMBULL, CT, US · Community Improvement & Capacity Building · Latest available filing year: 2024 · Primary form: IRS Form 990-N
- National Association of Negro Busin Ess and Professional Womens C
EIN 113016409 · Headquarters: Hamden, CT, US · Unknown & Unclassified · Latest available filing year: 2023 · Primary form: IRS Form 990-N
- National Association of Negro Busin Ess and Professional Womens C
EIN 270029579 · Headquarters: New Haven, CT, US · Community Improvement & Capacity Building · Latest available filing year: 2023 · Primary form: IRS Form 990-N
- National Association of Negro Business and Professional Womens C
EIN 061515375 · Headquarters: New Haven, CT, US · Employment · Latest available filing year: 2025 · Primary form: IRS Form 990-N
- National Association of Negro Business and Professional Womens C
EIN 222521924 · Headquarters: Waterbury, CT, US · Employment · Latest available filing year: 2007 · Primary form: IRS Form 990-N
- National Association of Neonatal Nurses
EIN 833088502 · Headquarters: Tolland, CT, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N
- National Association of Nigerian Nurses in North America-connecticu
EIN 844249601 · Headquarters: SANDY HOOK, CT, US · Philanthropy, Voluntarism & Grantmaking Foundations · Latest available filing year: 2025 · Primary form: IRS Form 990-N
- National Association of Power Engineers Inc
EIN 066068836 · Headquarters: Willington, CT, US · Public & Societal Benefit · Latest available filing year: 2013 · Primary form: IRS Form 990-N
- National Association of Professional Mortgage Women
EIN 760436907 · Headquarters: West Hartford, CT, US · Community Improvement & Capacity Building · Latest available filing year: 2015 · Primary form: IRS Form 990-N
- National Association of Professional Mortgage Women
EIN 770313198 · Headquarters: West Hartford, CT, US · Community Improvement & Capacity Building · Latest available filing year: 2015 · Primary form: IRS Form 990-N
- National Association of Professional Mortgage Women
EIN 911555726 · Headquarters: West Hartford, CT, US · Community Improvement & Capacity Building · Latest available filing year: 2015 · Primary form: IRS Form 990-N
- National Association of Professional Mortgage Women Easter
EIN 272916061 · Headquarters: West Hartford, CT, US · Civil Rights, Social Action & Advocacy · Latest available filing year: 2015 · Primary form: IRS Form 990-N
- National Association of Public Affairs Networks Inc
EIN 201365183 · Headquarters: Hartford, CT, US · Education · Latest available filing year: 2019 · Primary form: IRS Form 990-N
- National Association of Purchasing Management - Seven
EIN 237035781 · Headquarters: Norwalk, CT, US · Recreation & Sports · Latest available filing year: 2011 · Primary form: IRS Form 990-N
- National Association of Retired & Veteran Railway Employees
EIN 521255474 · Headquarters: Hamden, CT, US · Public & Societal Benefit · Latest available filing year: 2010 · Primary form: IRS Form 990-N
- National Association of Scholars
EIN 931226383 · Headquarters: New Britain, CT, US · Education · Latest available filing year: 2025 · Primary form: IRS Form 990-N
- National Association of Seadogs Blizzard
EIN 932990919 · Headquarters: REDDING, CT, US · Arts, Culture & Humanities · Latest available filing year: 2025 · Primary form: IRS Form 990-N
- National Association of Tax Professionals Inc
EIN 061249462 · Headquarters: SHELTON, CT, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N
- National Association of Teachers of Singing
EIN 223202640 · Headquarters: Hamden, CT, US · Education · Latest available filing year: 2025 · Primary form: IRS Form 990-N
- National Association of Watch and Clock Collectors Inc
EIN 522149019 · Headquarters: STRATFORD, CT, US · Arts, Culture & Humanities · Latest available filing year: 2025 · Primary form: IRS Form 990-N
- National Association of Women in Construction
EIN 237028843 · Headquarters: WINDSOR, CT, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N
- National Auxiliary of the Sons of Union Veterans of Civil War
EIN 066107730 · Headquarters: Cromwell, CT, US · Public & Societal Benefit · Latest available filing year: 2019 · Primary form: IRS Form 990-N
- National Auxiliary of the Sons of Union Veterans of the Civil War Us
EIN 066107734 · Headquarters: Rockville, CT, US · Public & Societal Benefit · Latest available filing year: 2007 · Primary form: IRS Form 990-N
- National Black Nurses Association Inc
EIN 061555276 · Headquarters: HARTFORD, CT, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N
- National Business Travel Association Inc
EIN 061477324 · Headquarters: Terryville, CT, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N
- National Camping Travelers Inc
EIN 237203261 · Headquarters: North Stoniington, CT, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N
- National Cancer Awareness Foundation
EIN 020522300 · Headquarters: Farmington, CT, US · Unknown & Unclassified · Latest available filing year: 2010 · Primary form: IRS Form 990-N
- National Center for Financial Training Inc
EIN 061588153 · Headquarters: Norwich, CT, US · Public & Societal Benefit · Latest available filing year: 2016 · Primary form: IRS Form 990-N
- National Center for Inquiry Learning Inc
EIN 472341257 · Headquarters: Sandy Hook, CT, US · Education · Latest available filing year: 2025 · Primary form: IRS Form 990-N
- National Center for Montessori in the Public Sector
EIN 473737369 · Headquarters: WEST HARTFORD, CT, USA · Education · Latest available filing year: 2024 · Primary form: IRS Form 990
- National Charitable Endowment
EIN 822958346 · Headquarters: Darien, CT, US · Philanthropy, Voluntarism & Grantmaking Foundations · Latest available filing year: 2024 · Primary form: IRS Form 990
- National Charity League - Canaan Parish
EIN 061495483 · Headquarters: New Canaan, CT, US · Philanthropy, Voluntarism & Grantmaking Foundations · Latest available filing year: 2024 · Primary form: IRS Form 990-N
- National Charity League Inc
EIN 061466324 · Headquarters: Ridgefield, CT, US · Philanthropy, Voluntarism & Grantmaking Foundations · Latest available filing year: 2025 · Primary form: IRS Form 990-N
- National Charity League Inc Fairfield Chapter
EIN 463004954 · Headquarters: Fairfield, CT, US · Human Services · Latest available filing year: 2024 · Primary form: IRS Form 990-N
- National Charity League Inc Greenwich Chapter
EIN 845059320 · Headquarters: Riverside, CT, US · Philanthropy, Voluntarism & Grantmaking Foundations · Latest available filing year: 2022 · Primary form: IRS Form 990-N
- National Charity League Inc New Canaan Chapter
EIN 061438136 · Headquarters: NEW CANAAN, CT, USA · Philanthropy, Voluntarism & Grantmaking Foundations · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ
- National Charity League Inc Norwalk Chapter
EIN 862761523 · Headquarters: Norwalk, CT, US · Philanthropy, Voluntarism & Grantmaking Foundations · Latest available filing year: 2020 · Primary form: IRS Form 990-N
- National Charity League Westport Chapter
EIN 870769582 · Headquarters: Westport, CT, US · Community Improvement & Capacity Building · Latest available filing year: 2024 · Primary form: IRS Form 990-N
- National Charity League-nutmeg Chapter
EIN 061547401 · Headquarters: Ridgefield, CT, US · Human Services · Latest available filing year: 2024 · Primary form: IRS Form 990-N
- National Coast Guard Museum Association Inc
EIN 061621858 · Headquarters: NEW LONDON, CT, USA · Arts, Culture & Humanities · Latest available filing year: 2024 · Primary form: IRS Form 990
- National Community Development
EIN 223075761 · Headquarters: STRATFORD, CT, USA · Community Improvement & Capacity Building · Latest available filing year: 2011 · Primary form: IRS Form 990-PF
- National Community of Catechetical Leaders
EIN 520969407 · Headquarters: CHESHIRE, CT, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990
- National Corvette Restorers Society Inc
EIN 061259147 · Headquarters: Danbury, CT, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N
- National Council for Geocosmic Research Inc
EIN 450550616 · Headquarters: Trumbull, CT, US · Recreation & Sports · Latest available filing year: 2015 · Primary form: IRS Form 990-N
- National Council of 56 Clubs
EIN 611263883 · Headquarters: Stratford, CT, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N
- National Council of Family Relations
EIN 364676521 · Headquarters: Storrs, CT, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N
- National Council of Jewish Women Incorporated
EIN 060940003 · Headquarters: Danbury, CT, US · Community Improvement & Capacity Building · Latest available filing year: 2011 · Primary form: IRS Form 990-N
- National Council of Jewish Women Incorporated
EIN 061078644 · Headquarters: Simsbury, CT, US · Unknown & Unclassified · Latest available filing year: 2019 · Primary form: IRS Form 990-N
- National Council of Jewish Women Incorporated
EIN 066062813 · Headquarters: Fairfield, CT, US · Community Improvement & Capacity Building · Latest available filing year: 2011 · Primary form: IRS Form 990-N
- National Council of Jewish Women Incorporated
EIN 237426866 · Headquarters: Hamden, CT, US · Community Improvement & Capacity Building · Latest available filing year: 2011 · Primary form: IRS Form 990-N
- National Council of Negro Women Inc
EIN 066082740 · Headquarters: Bloomfield, CT, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N
- National Council of Negro Women Inc
EIN 562344983 · Headquarters: New Haven, CT, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N
- National Council of Negro Women Inc
EIN 853851373 · Headquarters: Oakdale, CT, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N
- National Council of Negro Women Inc
EIN 911917271 · Headquarters: NEW LONDON, CT, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N
- National Council of Teachers of English
EIN 821650099 · Headquarters: BRISTOL, CT, US · Unknown & Unclassified · Latest available filing year: 2023 · Primary form: IRS Form 990-N
- National Diaper Bank Network Inc
EIN 452823935 · Headquarters: NEW HAVEN, CT, USA · Human Services · Latest available filing year: 2024 · Primary form: IRS Form 990
- National Education Association in Danbury
EIN 237107187 · Headquarters: DANBURY, CT, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990
- National Educational Support Trust USA INC
EIN 454714585 · Headquarters: Storrs Mansfield, CT, USA · Education · Latest available filing year: 2020 · Primary form: IRS Form 990-PF
- National Electrical Contractors Association Inc & Ibew 90 Jatc
EIN 237311925 · Headquarters: WALLINGFORD, CT, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990
- National Electrical Contractors of Assn Inc
EIN 060672066 · Headquarters: BERLIN, CT, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990
- National Emphysema Foundation Inc
EIN 237124098 · Headquarters: NORWALK, CT, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-PF
- National Exchange Club
EIN 066044320 · Headquarters: Canaan, CT, US · Community Improvement & Capacity Building · Latest available filing year: 2014 · Primary form: IRS Form 990-N
- National Exchange Club
EIN 066047185 · Headquarters: WATERBURY, CT, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N
- National Exchange Club
EIN 066047354 · Headquarters: MIDDLETOWN, CT, US · Community Improvement & Capacity Building · Latest available filing year: 2023 · Primary form: IRS Form 990-N