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

  1. American Federation of Teachers Newtown Federation of Teachers

    EIN 237106725 · Headquarters: Sandy Hook, CT, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  2. American Federation of Teachers University of Connecticut Professional

    EIN 066070253 · Headquarters: STORRS, CT, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  3. American Federation of Teachers West Haven Federation of Teachers

    EIN 066073591 · Headquarters: WEST HAVEN, CT, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  4. American Federation of Teachers Wethersfield Federation of Teachers

    EIN 066068869 · Headquarters: WETHERSFIELD, CT, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  5. American Federation of Technical Engineers

    EIN 060977844 · Headquarters: Stratford, CT, USA · Employment · Latest available filing year: 2023 · Primary form: IRS Form 990-EZ

  6. American Federation Service Clerical Local 318

    EIN 061069342 · Headquarters: Rocky Hill, CT, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-EZ

  7. American Federation Teachers 4257

    EIN 237297723 · Headquarters: East Hartford, CT, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  8. American Federations of Teachers

    EIN 900935330 · Headquarters: Winsted, CT, US · Unknown & Unclassified · Latest available filing year: 2023 · Primary form: IRS Form 990-N

  9. American Fencing Alliance Corp

    EIN 465439733 · Headquarters: Cos Cob, CT, US · Recreation & Sports · Latest available filing year: 2014 · Primary form: IRS Form 990-N

  10. American Fire Sprinkler Association Inc

    EIN 800095383 · Headquarters: Milford, CT, US · Public Safety, Disaster Preparedness & Relief · Latest available filing year: 2008 · Primary form: IRS Form 990-N

  11. American Fisheries Society

    EIN 237226682 · Headquarters: STORRS MANSFIELD, CT, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  12. American Friends of Afem Inc

    EIN 471033509 · Headquarters: New Haven, CT, US · International, Foreign Affairs & National Security · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  13. American Friends of Argentinean Yeshivot Inc

    EIN 262681657 · Headquarters: Waterbury, CT, US · Philanthropy, Voluntarism & Grantmaking Foundations · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  14. American Friends of Arts and Crafts in Chipping Campden

    EIN 202429504 · Headquarters: Sharon, CT, US · Arts, Culture & Humanities · Latest available filing year: 2019 · Primary form: IRS Form 990-N

  15. American Friends of Chabad of Portugal

    EIN 274831983 · Headquarters: West Hartford, CT, USA · Religion Related · Latest available filing year: 2025 · Primary form: IRS Form 990

  16. American Friends of Kenya Inc

    EIN 550884320 · Headquarters: WETHERSFIELD, CT, USA · Education · Latest available filing year: 2025 · Primary form: IRS Form 990-EZ

  17. American Friends of Kishorit Inc

    EIN 274371984 · Headquarters: West Hartford, CT, USA · Philanthropy, Voluntarism & Grantmaking Foundations · Latest available filing year: 2024 · Primary form: IRS Form 990

  18. American Friends of Le Korsa Inc

    EIN 203279061 · Headquarters: BETHANY, CT, USA · Philanthropy, Voluntarism & Grantmaking Foundations · Latest available filing year: 2024 · Primary form: IRS Form 990

  19. American Friends of Learners in Kenya

    EIN 923671811 · Headquarters: Norwalk, CT, US · International, Foreign Affairs & National Security · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  20. American Friends of Leo Baeck College Inc

    EIN 874625919 · Headquarters: Orange, CT, US · Philanthropy, Voluntarism & Grantmaking Foundations · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  21. American Friends of Les Etes De La Danse Inc

    EIN 454202156 · Headquarters: Stamford, CT, USA · Arts, Culture & Humanities · Latest available filing year: 2020 · Primary form: IRS Form 990-EZ

  22. American Friends of Lifeline for the Old in Israel Inc

    EIN 132965874 · Headquarters: ORANGE, CT, USA · International, Foreign Affairs & National Security · Latest available filing year: 2011 · Primary form: IRS Form 990-EZ

  23. American Friends of the Archbishop of Canterbury's Anglican Communion Fundinc

    EIN 311720280 · Headquarters: GREENWICH, CT, USA · Religion Related · Latest available filing year: 2024 · Primary form: IRS Form 990

  24. American Friends of the Episcopal Diocese of Jerusalem

    EIN 596155008 · Headquarters: Darien, CT, USA · Human Services · Latest available filing year: 2025 · Primary form: IRS Form 990

  25. American Friends of the Grange Festival Inc

    EIN 844713815 · Headquarters: FAIRFIELD, CT, US · Arts, Culture & Humanities · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  26. American Friends of the Henri-cartier Bresson Foundation Inc C/o Arlety Campos

    EIN 640965574 · Headquarters: NEW CANAAN, CT, USA · Arts, Culture & Humanities · Latest available filing year: 2017 · Primary form: IRS Form 990-EZ

  27. American Friends of the Institut Detudes Politiques

    EIN 843608166 · Headquarters: New Canaan, CT, US · International, Foreign Affairs & National Security · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  28. American Friends of Tikvot Inc Co Armel Leslie

    EIN 274499609 · Headquarters: STAMFORD, CT, USA · Human Services · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  29. American Friends of University College Oxford Inc

    EIN 222871561 · Headquarters: GLASTONBURY, CT, USA · Education · Latest available filing year: 2024 · Primary form: IRS Form 990

  30. American Globe Center

    EIN 934624107 · Headquarters: Stratford, CT, US · Arts, Culture & Humanities · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  31. American Guild of Organists

    EIN 061290639 · Headquarters: New Haven, CT, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  32. American Guild of Organists

    EIN 061429719 · Headquarters: New Canaan, CT, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  33. American Guild of Organists

    EIN 066103638 · Headquarters: Southington, CT, US · Arts, Culture & Humanities · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  34. American Guild of Organists

    EIN 066103639 · Headquarters: West Hartford, CT, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  35. American Guild of Organists Ago

    EIN 066103640 · Headquarters: North Stonington, CT, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  36. American Guild of Organists Northeastern Ct Chapter

    EIN 060997078 · Headquarters: Columbia, CT, US · Arts, Culture & Humanities · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  37. American Harp Society

    EIN 943006422 · Headquarters: Wilton, CT, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  38. American Hindu Rco Inc

    EIN 261900979 · Headquarters: WILTON, CT, USA · Religion Related · Latest available filing year: 2024 · Primary form: IRS Form 990

  39. American Hope Foundation of Greater Hartford Inc

    EIN 814230295 · Headquarters: Manchester, CT, US · Mental Health & Crisis Intervention · Latest available filing year: 2021 · Primary form: IRS Form 990-N

  40. American Hot Rod Foundation Inc CO Stephen E Memishian

    EIN 431969463 · Headquarters: Greenwich, CT, USA · Arts, Culture & Humanities · Latest available filing year: 2025 · Primary form: IRS Form 990-PF

  41. American Humanist Assocation

    EIN 364847971 · Headquarters: Wilton, CT, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  42. American Humanist Association

    EIN 061284920 · Headquarters: Hamden, CT, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  43. American Humanist Association

    EIN 462792674 · Headquarters: New Haven, CT, US · Community Improvement & Capacity Building · Latest available filing year: 2013 · Primary form: IRS Form 990-N

  44. American Humanist Association

    EIN 872952357 · Headquarters: Rocky Hill, CT, US · Unknown & Unclassified · Latest available filing year: 2021 · Primary form: IRS Form 990-N

  45. American Immigration Lawyers Association

    EIN 911911187 · Headquarters: East Hartford, CT, US · Unknown & Unclassified · Latest available filing year: 2022 · Primary form: IRS Form 990-N

  46. American Immobiliare Inc C/o Brian Mcquillan

    EIN 811515272 · Headquarters: DARIEN, CT, USA · Education · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  47. American Impact Capital Foundation Inc

    EIN 831832513 · Headquarters: WESTPORT, CT, USA · Human Services · Latest available filing year: 2019 · Primary form: IRS Form 990-EZ

  48. American Independent Medical Practice Association

    EIN 933104970 · Headquarters: STAMFORD, CT, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  49. American Indian Achievement Fund Inc

    EIN 863700477 · Headquarters: Danbury, CT, US · Education · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  50. American Industrial Hygiene Association

    EIN 061030126 · Headquarters: Milford, CT, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  51. American Inns of Court Foundation

    EIN 263710632 · Headquarters: Hartford, CT, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  52. American Inns of Court Foundation

    EIN 521636963 · Headquarters: Stamford, CT, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  53. American Institute for Foreign Study Foundation Inc

    EIN 066100574 · Headquarters: STAMFORD, CT, USA · International, Foreign Affairs & National Security · Latest available filing year: 2024 · Primary form: IRS Form 990

  54. American Institute for Islamic and Arabic Studies

    EIN 900397817 · Headquarters: Fairfield, CT, USA · Religion Related · Latest available filing year: 2016 · Primary form: IRS Form 990-EZ

  55. American Institute for Neuro-integrative Development Inc Dba Giant Steps Ct

    EIN 223202695 · Headquarters: FAIRFIELD, CT, USA · Education · Latest available filing year: 2024 · Primary form: IRS Form 990

  56. American Institute of Aeronautics and Astronautics

    EIN 061316598 · Headquarters: Tolland, CT, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  57. American Institute of Building Design Connecticut Society

    EIN 061461835 · Headquarters: Windsor, CT, US · Arts, Culture & Humanities · Latest available filing year: 2013 · Primary form: IRS Form 990-N

  58. American Institute of Chemical Engineers

    EIN 237424907 · Headquarters: Waterbury, CT, US · Science & Technology · Latest available filing year: 2015 · Primary form: IRS Form 990-N

  59. American Institute of Chemical Engineers

    EIN 237424925 · Headquarters: New Canaan, CT, US · Recreation & Sports · Latest available filing year: 2011 · Primary form: IRS Form 990-N

  60. American Institute of Chemical Engineers

    EIN 510235973 · Headquarters: Windsor, CT, US · Science & Technology · Latest available filing year: 2010 · Primary form: IRS Form 990-N

  61. American Institute of Graphic Arts

    EIN 264081312 · Headquarters: Norwalk, CT, US · Arts, Culture & Humanities · Latest available filing year: 2009 · Primary form: IRS Form 990-N

  62. American Institute of Graphic Arts

    EIN 383789210 · Headquarters: Waterbury, CT, US · Arts, Culture & Humanities · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  63. American Iris Society

    EIN 550871556 · Headquarters: Cheshire, CT, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  64. American Italian Civic Club Inc

    EIN 066148334 · Headquarters: WATERBURY, CT, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990

  65. American Justice Project Inc

    EIN 874615625 · Headquarters: Bloomfield, CT, US · Civil Rights, Social Action & Advocacy · Latest available filing year: 2023 · Primary form: IRS Form 990-N

  66. American Kettlebell Alliance

    EIN 453535248 · Headquarters: WILTON, CT, US · Recreation & Sports · Latest available filing year: 2021 · Primary form: IRS Form 990-N

  67. American Lab Rescue Inc

    EIN 205985062 · Headquarters: TOLLAND, CT, USA · Animal Related · Latest available filing year: 2024 · Primary form: IRS Form 990

  68. American Law and Economics Association Inc

    EIN 223093764 · Headquarters: NEW HAVEN, CT, USA · Arts, Culture & Humanities · Latest available filing year: 2024 · Primary form: IRS Form 990

  69. American Legion

    EIN 056035653 · Headquarters: PAWCATUCK, CT, US · Unknown & Unclassified · Latest available filing year: 2020 · Primary form: IRS Form 990-N

  70. American Legion

    EIN 060322724 · Headquarters: Manchester, CT, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  71. American Legion

    EIN 060615638 · Headquarters: Oakdale, CT, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  72. American Legion

    EIN 060686627 · Headquarters: britain, CT, US · Public & Societal Benefit · Latest available filing year: 2017 · Primary form: IRS Form 990-N

  73. American Legion

    EIN 060737245 · Headquarters: SHELTON, CT, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990

  74. American Legion

    EIN 060794256 · Headquarters: Waterbury, CT, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  75. American Legion

    EIN 060870291 · Headquarters: Windsor Locks, CT, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  76. American Legion

    EIN 060871409 · Headquarters: Niantic, CT, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  77. American Legion

    EIN 060902569 · Headquarters: Middletown, CT, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  78. American Legion

    EIN 061372999 · Headquarters: Bridgeport, CT, US · Public & Societal Benefit · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  79. American Legion

    EIN 061388163 · Headquarters: Avon, CT, US · Public & Societal Benefit · Latest available filing year: 2011 · Primary form: IRS Form 990-N

  80. American Legion

    EIN 061396593 · Headquarters: Newtown, CT, US · Unknown & Unclassified · Latest available filing year: 2023 · Primary form: IRS Form 990-N

  81. American Legion

    EIN 061572882 · Headquarters: Guilford, CT, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  82. American Legion

    EIN 061636847 · Headquarters: new hartford, CT, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  83. American Legion

    EIN 066037287 · Headquarters: Hamden, CT, US · Public & Societal Benefit · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  84. American Legion

    EIN 066042524 · Headquarters: Stratford, CT, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  85. American Legion

    EIN 066042809 · Headquarters: Greenwich, CT, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  86. American Legion

    EIN 066046039 · Headquarters: Noank, CT, US · Unknown & Unclassified · Latest available filing year: 2022 · Primary form: IRS Form 990-N

  87. American Legion

    EIN 066046880 · Headquarters: EAST HAMPTON, CT, US · Unknown & Unclassified · Latest available filing year: 2019 · Primary form: IRS Form 990-N

  88. American Legion

    EIN 066048493 · Headquarters: Winsted, CT, US · Public & Societal Benefit · Latest available filing year: 2009 · Primary form: IRS Form 990-N

  89. American Legion

    EIN 066048875 · Headquarters: Cromwell, CT, US · Unknown & Unclassified · Latest available filing year: 2021 · Primary form: IRS Form 990-N

  90. American Legion

    EIN 066049467 · Headquarters: Hebron, CT, US · Public & Societal Benefit · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  91. American Legion

    EIN 066049582 · Headquarters: Taftville, CT, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  92. American Legion

    EIN 066051082 · Headquarters: Madison, CT, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  93. American Legion

    EIN 066052093 · Headquarters: Rocky Hill, CT, US · Public & Societal Benefit · Latest available filing year: 2018 · Primary form: IRS Form 990-N

  94. American Legion

    EIN 066054297 · Headquarters: Chester, CT, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  95. American Legion

    EIN 066056929 · Headquarters: Torrington, CT, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  96. American Legion

    EIN 066062838 · Headquarters: Rocky Hill, CT, US · Public & Societal Benefit · Latest available filing year: 2016 · Primary form: IRS Form 990-N

  97. American Legion

    EIN 066068487 · Headquarters: East Hartford, CT, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  98. American Legion

    EIN 066069207 · Headquarters: WILTON, CT, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  99. American Legion

    EIN 066069977 · Headquarters: Derby, CT, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  100. American Legion

    EIN 066069988 · Headquarters: Enfield, CT, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

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