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
- American Association of University Women
EIN 066043902 · Headquarters: New Canaan, CT, US · Community Improvement & Capacity Building · Latest available filing year: 2009 · Primary form: IRS Form 990-N
- American Association of University Women
EIN 066048499 · Headquarters: Waterford, CT, US · Community Improvement & Capacity Building · Latest available filing year: 2018 · Primary form: IRS Form 990-N
- American Association of University Women
EIN 066048585 · Headquarters: Prospect, CT, US · Community Improvement & Capacity Building · Latest available filing year: 2010 · Primary form: IRS Form 990-N
- American Association of University Women
EIN 066053819 · Headquarters: Trumbull, CT, US · Education · Latest available filing year: 2025 · Primary form: IRS Form 990-N
- American Association of University Women
EIN 066063763 · Headquarters: NEW BRITAIN, CT, US · Education · Latest available filing year: 2023 · Primary form: IRS Form 990-N
- American Association of University Women
EIN 066069248 · Headquarters: Clinton, CT, US · Education · Latest available filing year: 2020 · Primary form: IRS Form 990-N
- American Association of University Women
EIN 066069986 · Headquarters: Trumbull, CT, US · Education · Latest available filing year: 2025 · Primary form: IRS Form 990-N
- American Association of University Women
EIN 066070245 · Headquarters: Ashford, CT, US · Education · Latest available filing year: 2025 · Primary form: IRS Form 990-N
- American Association of University Women
EIN 222510054 · Headquarters: Old Saybrook, CT, US · Education · Latest available filing year: 2024 · Primary form: IRS Form 990-N
- American Association of University Women
EIN 237147391 · Headquarters: Ridgefield, CT, US · Community Improvement & Capacity Building · Latest available filing year: 2008 · Primary form: IRS Form 990-N
- American Association of University Women Inc
EIN 066057849 · Headquarters: Danbury, CT, US · Education · Latest available filing year: 2025 · Primary form: IRS Form 990-N
- American Association of University Women Inc
EIN 066359934 · Headquarters: Middletown, CT, US · Community Improvement & Capacity Building · Latest available filing year: 2012 · Primary form: IRS Form 990-N
- American Association of Zoo Keepers
EIN 061284528 · Headquarters: Bridgeport, CT, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N
- American Baroque Orchestra
EIN 475053802 · Headquarters: New Haven, CT, US · Arts, Culture & Humanities · Latest available filing year: 2025 · Primary form: IRS Form 990-N
- American Board of Laser Surgery Incorporated
EIN 391534455 · Headquarters: TRUMBULL, CT, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-EZ
- American Center for the Advancement of the Blind Inc
EIN 061625257 · Headquarters: CANTON, CT, US · Human Services · Latest available filing year: 2025 · Primary form: IRS Form 990-N
- American Chamber Orchestra
EIN 201633413 · Headquarters: Norwalk, CT, US · Arts, Culture & Humanities · Latest available filing year: 2025 · Primary form: IRS Form 990-N
- American Charitable Tamil Society Inc
EIN 850752919 · Headquarters: Glastonbury, CT, USA · Arts, Culture & Humanities · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ
- American Chemical Society
EIN 066048676 · Headquarters: FAIRFIELD, CT, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N
- American Chemical Society
EIN 066068731 · Headquarters: Derby, CT, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N
- American Chemical Society Electric Cable Compounds
EIN 061085957 · Headquarters: Newtown, CT, US · Arts, Culture & Humanities · Latest available filing year: 2013 · Primary form: IRS Form 990-N
- American Chinese Heritage Association
EIN 812387365 · Headquarters: Fairfield, CT, US · Arts, Culture & Humanities · Latest available filing year: 2025 · Primary form: IRS Form 990-N
- American Civil Liberties Union Foundation of Connecticut Inc
EIN 060871754 · Headquarters: HARTFORD, CT, USA · Civil Rights, Social Action & Advocacy · Latest available filing year: 2024 · Primary form: IRS Form 990
- American Civil Liberties Union of Connecticut Inc
EIN 452857664 · Headquarters: HARTFORD, CT, USA · Civil Rights, Social Action & Advocacy · Latest available filing year: 2024 · Primary form: IRS Form 990
- American Clock and Watch Museuminc
EIN 066006559 · Headquarters: BRISTOL, CT, USA · Arts, Culture & Humanities · Latest available filing year: 2024 · Primary form: IRS Form 990
- American College of Healthcare Executives
EIN 050613539 · Headquarters: GREENWICH, CT, USA · Community Improvement & Capacity Building · Latest available filing year: 2025 · Primary form: IRS Form 990-EZ
- American College of Nurse-midwives
EIN 320133341 · Headquarters: Branford, CT, US · Community Improvement & Capacity Building · Latest available filing year: 2024 · Primary form: IRS Form 990-N
- American College of Physicians Connecticut Chapter
EIN 311695017 · Headquarters: AVON, CT, USA · Education · Latest available filing year: 2024 · Primary form: IRS Form 990
- American College of Psychoanalysts
EIN 480813330 · Headquarters: Bloomfield, CT, US · Unknown & Unclassified · Latest available filing year: 2021 · Primary form: IRS Form 990-N
- American Colonization Society
EIN 222480991 · Headquarters: Danbury, CT, US · Community Improvement & Capacity Building · Latest available filing year: 2011 · Primary form: IRS Form 990-N
- American Committee for the Advance- Ment of Torah Education in Israel
EIN 112434546 · Headquarters: DEEP RIVER, CT, USA · Religion Related · Latest available filing year: 2024 · Primary form: IRS Form 990
- American Compact Inc
EIN 871505269 · Headquarters: STONINGTON, CT, USA · Civil Rights, Social Action & Advocacy · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ
- American Contract Bridge League Unit 126 Inc
EIN 061053734 · Headquarters: Greenwich, CT, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N
- American Council of Engineering Companies of Connecticut
EIN 060860966 · Headquarters: NORTH HAVEN, CT, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990
- American Criminal Justice Association-lambda Alpha Epsilon
EIN 061395362 · Headquarters: West Haven, CT, US · Unknown & Unclassified · Latest available filing year: 2023 · Primary form: IRS Form 990-N
- American Dental Assistants Association
EIN 060959544 · Headquarters: Thomaston, CT, US · Education · Latest available filing year: 2025 · Primary form: IRS Form 990-N
- American Destiny Inc
EIN 392979564 · Headquarters: Trumbull, CT, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N
- American Detection Dog Foundation Inc
EIN 853788424 · Headquarters: STRATFORD, CT, US · Animal Related · Latest available filing year: 2022 · Primary form: IRS Form 990-N
- American Diplomacy Foundation
EIN 202832124 · Headquarters: NEW CANNAN, CT, USA · Education · Latest available filing year: 2025 · Primary form: IRS Form 990
- American Doctrine International Education Foundation Inc
EIN 030370700 · Headquarters: Derby, CT, US · Education · Latest available filing year: 2021 · Primary form: IRS Form 990-N
- American Eagle Financial Credit Union
EIN 472559616 · Headquarters: Wethersfield, CT, US · Public & Societal Benefit · Latest available filing year: 2024 · Primary form: IRS Form 990
- American Electroplaters & Surface Finishers Society Inc
EIN 222527540 · Headquarters: Wilton, CT, US · Community Improvement & Capacity Building · Latest available filing year: 2008 · Primary form: IRS Form 990-N
- American Essential Oil Trade Association Incorporated
EIN 472178302 · Headquarters: Glastonbury, CT, US · Unknown & Unclassified · Latest available filing year: 2014 · Primary form: IRS Form 990-N
- American Ex-prisoners of War
EIN 742236312 · Headquarters: Clinton, CT, US · Public & Societal Benefit · Latest available filing year: 2007 · Primary form: IRS Form 990-N
- American Fed of Teachers Local 5051
EIN 061045776 · Headquarters: NEW LONDON, CT, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ
- American Fed of Teachers Local 5099 Windham Community Memorial Hos
EIN 061415568 · Headquarters: WILLIMANTIC, CT, USA · Unknown & Unclassified · Latest available filing year: 2023 · Primary form: IRS Form 990-EZ
- American Federation of Government Employees
EIN 043603305 · Headquarters: west haven, CT, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N
- American Federation of Government Employees
EIN 061378930 · Headquarters: New London, CT, US · Employment · Latest available filing year: 2017 · Primary form: IRS Form 990-N
- American Federation of Government Employees
EIN 066070288 · Headquarters: New Fairfield, CT, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N
- American Federation of Government Employees
EIN 066082836 · Headquarters: MIDDLETOWN, CT, US · Employment · Latest available filing year: 2015 · Primary form: IRS Form 990-N
- American Federation of Government Employees
EIN 066109847 · Headquarters: Suffield, CT, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N
- American Federation of Government Employees
EIN 237112282 · Headquarters: Orange, CT, US · Employment · Latest available filing year: 2017 · Primary form: IRS Form 990-N
- American Federation of Government Employees Local 2105
EIN 066069954 · Headquarters: Groton, CT, USA · Employment · Latest available filing year: 2025 · Primary form: IRS Form 990-EZ
- American Federation of Labor & Congress of Industrial Orgs
EIN 061229898 · Headquarters: EAST HAVEN, CT, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N
- American Federation of Labor & Congress of Industrial Orgs
EIN 061518525 · Headquarters: Uncasville, CT, US · Employment · Latest available filing year: 2016 · Primary form: IRS Form 990-N
- American Federation of Labor and Congress of Industrial Orgs
EIN 061392063 · Headquarters: MONROE, CT, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N
- American Federation of Musicians Local 400
EIN 060384079 · Headquarters: Rocky Hill, CT, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990
- American Federation of Musicians of the Us & Canada
EIN 060430403 · Headquarters: Cheshire, CT, US · Arts, Culture & Humanities · Latest available filing year: 2017 · Primary form: IRS Form 990-N
- American Federation of Musicians of the Us & Canada
EIN 066068473 · Headquarters: Torrington, CT, US · Arts, Culture & Humanities · Latest available filing year: 2015 · Primary form: IRS Form 990-N
- American Federation of Musicians of the Us & Canada
EIN 066069221 · Headquarters: Middletown, CT, US · Arts, Culture & Humanities · Latest available filing year: 2009 · Primary form: IRS Form 990-N
- American Federation of St Cty and Muni Empl 1376 Loc Derby Police Dept Emp
EIN 066107724 · Headquarters: DERBY, CT, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ
- American Federation of State County & Muncipal Employees Local 1565
EIN 066069953 · Headquarters: GLASTONBURY, CT, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990
- American Federation of State County & Municipal Em
EIN 066084969 · Headquarters: Waterbury, CT, USA · Unknown & Unclassified · Latest available filing year: 2023 · Primary form: IRS Form 990-EZ
- American Federation of State County & Municipal Employees
EIN 042667570 · Headquarters: Enfield, CT, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N
- American Federation of State County & Municipal Employees
EIN 060789307 · Headquarters: branford, CT, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N
- American Federation of State County & Municipal Employees
EIN 060959808 · Headquarters: BRISTOL, CT, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ
- American Federation of State County & Municipal Employees
EIN 060964729 · Headquarters: Newington, CT, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N
- American Federation of State County & Municipal Employees
EIN 060974775 · Headquarters: New Canaan, CT, US · Employment · Latest available filing year: 2010 · Primary form: IRS Form 990-N
- American Federation of State County & Municipal Employees
EIN 061003473 · Headquarters: Wallingford, CT, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N
- American Federation of State County & Municipal Employees
EIN 061019052 · Headquarters: Bridgeport, CT, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N
- American Federation of State County & Municipal Employees
EIN 061055671 · Headquarters: TERRYVILLE, CT, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N
- American Federation of State County & Municipal Employees
EIN 061058312 · Headquarters: Milford, CT, US · Employment · Latest available filing year: 2009 · Primary form: IRS Form 990-N
- American Federation of State County & Municipal Employees
EIN 061070436 · Headquarters: Uncasville, CT, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N
- American Federation of State County & Municipal Employees
EIN 061072318 · Headquarters: West Hartford, CT, US · Employment · Latest available filing year: 2015 · Primary form: IRS Form 990-N
- American Federation of State County & Municipal Employees
EIN 061073281 · Headquarters: Fairfield, CT, US · Employment · Latest available filing year: 2018 · Primary form: IRS Form 990-N
- American Federation of State County & Municipal Employees
EIN 061090474 · Headquarters: South Windsor, CT, US · Employment · Latest available filing year: 2016 · Primary form: IRS Form 990-N
- American Federation of State County & Municipal Employees
EIN 061222279 · Headquarters: Groton, CT, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N
- American Federation of State County & Municipal Employees
EIN 061354638 · Headquarters: Simsbury, CT, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N
- American Federation of State County & Municipal Employees
EIN 061356868 · Headquarters: Stratford, CT, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N
- American Federation of State County & Municipal Employees
EIN 061413762 · Headquarters: East Hampton, CT, US · Community Improvement & Capacity Building · Latest available filing year: 2025 · Primary form: IRS Form 990-N
- American Federation of State County & Municipal Employees
EIN 061467976 · Headquarters: New Britain, CT, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N
- American Federation of State County & Municipal Employees
EIN 066049287 · Headquarters: BRISTOL, CT, US · Unknown & Unclassified · Latest available filing year: 2021 · Primary form: IRS Form 990-N
- American Federation of State County & Municipal Employees
EIN 066068477 · Headquarters: TRUMBULL, CT, USA · Unknown & Unclassified · Latest available filing year: 2021 · Primary form: IRS Form 990-EZ
- American Federation of State County & Municipal Employees
EIN 066068891 · Headquarters: MANCHESTER, CT, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-EZ
- American Federation of State County & Municipal Employees
EIN 066069183 · Headquarters: NEW BRITAIN, CT, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N
- American Federation of State County & Municipal Employees
EIN 066069196 · Headquarters: East Hartford, CT, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N
- American Federation of State County & Municipal Employees
EIN 066069198 · Headquarters: Middletown, CT, US · Unknown & Unclassified · Latest available filing year: 2023 · Primary form: IRS Form 990-N
- American Federation of State County & Municipal Employees
EIN 066069201 · Headquarters: Norwalk, CT, US · Employment · Latest available filing year: 2014 · Primary form: IRS Form 990-N
- American Federation of State County & Municipal Employees
EIN 066070027 · Headquarters: Manchester, CT, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N
- American Federation of State County & Municipal Employees
EIN 066070246 · Headquarters: east hampton, CT, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N
- American Federation of State County & Municipal Employees
EIN 066084971 · Headquarters: hamden, CT, US · Employment · Latest available filing year: 2025 · Primary form: IRS Form 990-N
- American Federation of State County & Municipal Employees
EIN 066084975 · Headquarters: New London, CT, US · Unknown & Unclassified · Latest available filing year: 2023 · Primary form: IRS Form 990-N
- American Federation of State County & Municipal Employees
EIN 066088821 · Headquarters: NEW BRITAIN, CT, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N
- American Federation of State County & Municipal Employees
EIN 066088822 · Headquarters: NEW BRITAIN, CT, US · Unknown & Unclassified · Latest available filing year: 2023 · Primary form: IRS Form 990-N
- American Federation of State County & Municipal Employees
EIN 066089834 · Headquarters: Newington, CT, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N
- American Federation of State County & Municipal Employees
EIN 066098668 · Headquarters: Milford, CT, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N
- American Federation of State County & Municipal Employees
EIN 066107719 · Headquarters: Watertown, CT, US · Employment · Latest available filing year: 2025 · Primary form: IRS Form 990-N
- American Federation of State County & Municipal Employees
EIN 066109906 · Headquarters: Torrington, CT, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N
- American Federation of State County & Municipal Employees
EIN 066109910 · Headquarters: EAST HARTFORD, CT, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N
- American Federation of State County & Municipal Employees
EIN 113690611 · Headquarters: Newington, CT, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N