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 Legion Auxiliary

    EIN 900535122 · Headquarters: Coventry, CT, US · Public & Societal Benefit · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  2. American Legion Auxiliary

    EIN 900542998 · Headquarters: East Haven, CT, US · Public & Societal Benefit · Latest available filing year: 2017 · Primary form: IRS Form 990-N

  3. American Legion Auxiliary

    EIN 920965055 · Headquarters: Chester, CT, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  4. American Legion Auxiliary Dept of Connecticut Inc

    EIN 060616090 · Headquarters: Rocky Hill, CT, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  5. American Legion Auxiliary Oakville Unit 195 Department of Connecticut

    EIN 300629039 · Headquarters: Watertown, CT, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  6. American Legion Auxiliary Post 165

    EIN 237227390 · Headquarters: WOLCOTT, CT, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  7. American Legion Auxiliary Sutter Te Rlizzi Unit 16 Dept of Ct

    EIN 061086055 · Headquarters: Derby, CT, US · Public & Societal Benefit · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  8. American Legion Auxiliary Unit 102

    EIN 264494745 · Headquarters: Manchester, CT, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  9. American Legion Auxiliary Unit 209

    EIN 811845946 · Headquarters: Bristol, CT, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  10. American Legion Auxiliary Unit 45

    EIN 264400157 · Headquarters: South Meriden, CT, US · Unknown & Unclassified · Latest available filing year: 2023 · Primary form: IRS Form 990-N

  11. American Legion Auxiliary Unit 60

    EIN 061022900 · Headquarters: Danbury, CT, US · Public & Societal Benefit · Latest available filing year: 2010 · Primary form: IRS Form 990-N

  12. American Legion Auxiliary Unit 89

    EIN 881762090 · Headquarters: East Haven, CT, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  13. American Legion Auxillary

    EIN 800312856 · Headquarters: Moodus, CT, US · Unknown & Unclassified · Latest available filing year: 2019 · Primary form: IRS Form 990-N

  14. American Legion Auxillary Mckinney-king Unit 142

    EIN 320305674 · Headquarters: Hartford, CT, US · Unknown & Unclassified · Latest available filing year: 2013 · Primary form: IRS Form 990-N

  15. American Legion Auxillary Murray Reynolds 76

    EIN 222481393 · Headquarters: North Haven, CT, US · Unknown & Unclassified · Latest available filing year: 2020 · Primary form: IRS Form 990-N

  16. American Legion Auxillary Robert O Fletcher Unit4

    EIN 222513196 · Headquarters: Franklin, CT, US · Unknown & Unclassified · Latest available filing year: 2023 · Primary form: IRS Form 990-N

  17. American Legion Baron Smith Golec Post 156

    EIN 066107592 · Headquarters: MOODUS, CT, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990

  18. American Legion Community Ambulance Inc

    EIN 066049471 · Headquarters: Jewett City, CT, USA · Health Care · Latest available filing year: 2016 · Primary form: IRS Form 990

  19. American Legion Department of Connecticut Inc

    EIN 060242006 · Headquarters: HARTFORD, CT, USA · Unknown & Unclassified · Latest available filing year: 2023 · Primary form: IRS Form 990

  20. American Legion Inc Brock Barnes Post 33

    EIN 061295903 · Headquarters: Plainville, CT, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  21. American Legion John M Siedlicki Post 187

    EIN 060911767 · Headquarters: Wallingford, CT, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  22. American Legion Laflamme Kusek Post 15

    EIN 060633845 · Headquarters: JEWETT CITY, CT, USA · Unknown & Unclassified · Latest available filing year: 2023 · Primary form: IRS Form 990

  23. American Legion Mckinney-king Post 142

    EIN 060689327 · Headquarters: HARTFORD, CT, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  24. American Legion Memorial Home Inc

    EIN 060787931 · Headquarters: LITCHFIELD, CT, USA · Public & Societal Benefit · Latest available filing year: 2024 · Primary form: IRS Form 990

  25. American Legion Plymouth Post 20

    EIN 060624574 · Headquarters: TERRYVILLE, CT, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  26. American Legion Post #8 Rau Locke

    EIN 060789891 · Headquarters: HARTFORD, CT, US · Public & Societal Benefit · Latest available filing year: 2018 · Primary form: IRS Form 990-N

  27. American Legion Post 0014 Dobosc- Ertel-laboc-hansen Post

    EIN 060665922 · Headquarters: VERNON, CT, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  28. American Legion Post 0180

    EIN 066107683 · Headquarters: Lebanon, CT, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  29. American Legion Post 101 SomersCT

    EIN 066107559 · Headquarters: Somers, CT, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  30. American Legion Post 112 Inc

    EIN 066107565 · Headquarters: Montville, CT, USA · Public & Societal Benefit · Latest available filing year: 2025 · Primary form: IRS Form 990-EZ

  31. American Legion Post 127

    EIN 066107572 · Headquarters: ORANGE, CT, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  32. American Legion Post 165 Billy Peterson

    EIN 066107678 · Headquarters: WOLCOTT, CT, USA · Public & Societal Benefit · Latest available filing year: 2025 · Primary form: IRS Form 990

  33. American Legion Post 19

    EIN 060242003 · Headquarters: WILLIMANTIC, CT, USA · Public & Societal Benefit · Latest available filing year: 2011 · Primary form: IRS Form 990-EZ

  34. American Legion Post 195

    EIN 066107690 · Headquarters: WATERTOWN, CT, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  35. American Legion Post 197

    EIN 060891457 · Headquarters: MARLBOROUGH, CT, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  36. American Legion Post 26

    EIN 060621714 · Headquarters: Stafford Springs, CT, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  37. American Legion Post 27 Morgan Weir

    EIN 066107513 · Headquarters: Litchfield, CT, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  38. American Legion Post 71-Building Association Inc

    EIN 060646242 · Headquarters: West Haven, CT, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  39. American Legion Post 91

    EIN 060363962 · Headquarters: MOOSUP, CT, USA · Unknown & Unclassified · Latest available filing year: 2023 · Primary form: IRS Form 990

  40. American Legion Seicheprey Post 2

    EIN 066109197 · Headquarters: BRISTOL, CT, USA · Public & Societal Benefit · Latest available filing year: 2024 · Primary form: IRS Form 990

  41. American Legion Tanguay Magill Post 80

    EIN 060721828 · Headquarters: Enfield, CT, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  42. American Lung Association of New York Inc

    EIN 262818624 · Headquarters: EAST HARTFORD, CT, USA · Diseases, Disorders & Medical Disciplines · Latest available filing year: 2012 · Primary form: IRS Form 990

  43. American Lung Association of the Northeast Inc

    EIN 060646594 · Headquarters: EAST HARTFORD, CT, USA · Diseases, Disorders & Medical Disciplines · Latest available filing year: 2016 · Primary form: IRS Form 990

  44. American Lyme Disease Foundation Inc

    EIN 133601933 · Headquarters: NEW HAVEN, CT, USA · Medical Research · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  45. American Marketing Association Inc

    EIN 061188405 · Headquarters: Norwalk, CT, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  46. American Marketing Association Inc

    EIN 222757612 · Headquarters: Sandy Hook, CT, US · Unknown & Unclassified · Latest available filing year: 2022 · Primary form: IRS Form 990-N

  47. American Milking Devon Cattle Association

    EIN 202877628 · Headquarters: Westbrook, CT, US · Food, Agriculture & Nutrition · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  48. American Mural Project Inc

    EIN 263993911 · Headquarters: WINSTED, CT, USA · Arts, Culture & Humanities · Latest available filing year: 2024 · Primary form: IRS Form 990

  49. American Museum Tort Law Inc

    EIN 061529225 · Headquarters: Winsted, CT, USA · Arts, Culture & Humanities · Latest available filing year: 2024 · Primary form: IRS Form 990

  50. American Nedicine Association

    EIN 811525770 · Headquarters: Norwalk, CT, US · Health Care · Latest available filing year: 2023 · Primary form: IRS Form 990-N

  51. American Nedicine Licensing Board

    EIN 412145530 · Headquarters: Stamford, CT, US · Community Improvement & Capacity Building · Latest available filing year: 2014 · Primary form: IRS Form 990-N

  52. American Nephrology Nurses Association

    EIN 300637761 · Headquarters: WALLINGFORD, CT, US · Diseases, Disorders & Medical Disciplines · Latest available filing year: 2014 · Primary form: IRS Form 990-N

  53. American New Zealand Associationin C/o Ian Philips

    EIN 800604574 · Headquarters: NORWALK, CT, US · Education · Latest available filing year: 2017 · Primary form: IRS Form 990-N

  54. American Orff Schulwerk Association Connecticut Chapter

    EIN 061291910 · Headquarters: Middletown, CT, US · Education · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  55. American Outlaws Hartford Chapter Inc

    EIN 463223415 · Headquarters: Burlington, CT, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  56. American Payroll Association-hartford Chapter Inc

    EIN 475032410 · Headquarters: WEST HARTFORD, CT, US · Community Improvement & Capacity Building · Latest available filing year: 2017 · Primary form: IRS Form 990-N

  57. American Pet Products Association Inc

    EIN 136146744 · Headquarters: STAMFORD, CT, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  58. American Pharmacists Association Academy of Student Pharmacists

    EIN 066068488 · Headquarters: Storrs Mansfield, CT, US · Unknown & Unclassified · Latest available filing year: 2021 · Primary form: IRS Form 990-N

  59. American Pharmacists Association Academy of Student Pharmacists

    EIN 453835611 · Headquarters: Hartford, CT, US · Unknown & Unclassified · Latest available filing year: 2022 · Primary form: IRS Form 990-N

  60. American Polish Citizens Club of Griswold Inc

    EIN 061268335 · Headquarters: GRISWOLD, CT, USA · Recreation & Sports · Latest available filing year: 2024 · Primary form: IRS Form 990

  61. American Postal Workers Union

    EIN 237112112 · Headquarters: North Haven, CT, US · Unknown & Unclassified · Latest available filing year: 2022 · Primary form: IRS Form 990-N

  62. American Postal Workers Union

    EIN 237338693 · Headquarters: Waterbury, CT, US · Employment · Latest available filing year: 2011 · Primary form: IRS Form 990-N

  63. American Postal Workers Union

    EIN 237340819 · Headquarters: Fairfield, CT, US · Employment · Latest available filing year: 2009 · Primary form: IRS Form 990-N

  64. American Postal Workers Union

    EIN 237340839 · Headquarters: Danbury, CT, US · Unknown & Unclassified · Latest available filing year: 2022 · Primary form: IRS Form 990-N

  65. American Postal Workers Union 240 Stamford Conn Area Local

    EIN 237338723 · Headquarters: Stamford, CT, USA · Unknown & Unclassified · Latest available filing year: 2020 · Primary form: IRS Form 990-EZ

  66. American Postal Workers Union Greater Connecticut Area Local 237

    EIN 060686229 · Headquarters: NORTH HAVEN, CT, USA · Employment · Latest available filing year: 2025 · Primary form: IRS Form 990

  67. American Postal Workers Union Local

    EIN 066068671 · Headquarters: EAST HARTFORD, CT, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990

  68. American Production & Inven Contrl Society Apics New Haven Ct

    EIN 061023206 · Headquarters: Wallingford, CT, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  69. American Production & Inventory Control Society

    EIN 061053887 · Headquarters: Danbury, CT, US · Unknown & Unclassified · Latest available filing year: 2022 · Primary form: IRS Form 990-N

  70. American Production and Inventory Control Society Fairfield County C

    EIN 510159515 · Headquarters: Norwalk, CT, US · Unknown & Unclassified · Latest available filing year: 2019 · Primary form: IRS Form 990-N

  71. American Red Magen David for Israel

    EIN 133174804 · Headquarters: New Haven, CT, US · Philanthropy, Voluntarism & Grantmaking Foundations · Latest available filing year: 2010 · Primary form: IRS Form 990-N

  72. American Ref-fuel Preston

    EIN 223117578 · Headquarters: PRESTON, CT, USA · Philanthropy, Voluntarism & Grantmaking Foundations · Latest available filing year: 2015 · Primary form: IRS Form 990-PF

  73. American Rental Association

    EIN 061129732 · Headquarters: Torrington, CT, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  74. American Rhododendron Society

    EIN 061051744 · Headquarters: Bloomfield, CT, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  75. American Rose Society

    EIN 581782982 · Headquarters: Meriden, CT, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  76. American Russian Sokol Sick Benefit Society of Bridgeport Inc

    EIN 060242534 · Headquarters: Shelton, CT, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  77. American Savings Foundation Inc

    EIN 300308972 · Headquarters: NEW BRITAIN, CT, USA · Philanthropy, Voluntarism & Grantmaking Foundations · Latest available filing year: 2025 · Primary form: IRS Form 990-PF

  78. American School at Hartford for the Deaf

    EIN 060667600 · Headquarters: WEST HARTFORD, CT, USA · Education · Latest available filing year: 2024 · Primary form: IRS Form 990

  79. American School for the Deaf Alumni Association

    EIN 061384519 · Headquarters: West Hartford, CT, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  80. American School for the Deaf Institute of Deaf Education and Culture Inc

    EIN 473343748 · Headquarters: WEST HARTFORD, CT, USA · Arts, Culture & Humanities · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  81. American Schooner Association Inc

    EIN 464543436 · Headquarters: MYSTIC, CT, US · Recreation & Sports · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  82. American Secondary Schools for International Students and Teachers Inc

    EIN 030272890 · Headquarters: SUFFIELD, CT, USA · International, Foreign Affairs & National Security · Latest available filing year: 2024 · Primary form: IRS Form 990

  83. American Shakespeare Theatre Inc

    EIN 473536111 · Headquarters: West Hartford, CT, US · Arts, Culture & Humanities · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  84. American Shepherd Ministries Inc

    EIN 932550386 · Headquarters: Jewett City, CT, US · Religion Related · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  85. American Society for Scleroderma Research Inc

    EIN 201769497 · Headquarters: Shelton, CT, US · Medical Research · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  86. American Society for Training and Development

    EIN 066080985 · Headquarters: Wilton, CT, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  87. American Society of Addiction Medicine Inc

    EIN 061575323 · Headquarters: Middletown, CT, US · Mental Health & Crisis Intervention · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  88. American Society of Friends of Teatro Alla Scala Inc

    EIN 472453571 · Headquarters: GREENWICH, CT, US · Arts, Culture & Humanities · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  89. American Society of Heating Refrig & Air Cond Engineer 004 Connecticut

    EIN 061137720 · Headquarters: CROMWELL, CT, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  90. American Society of Heating Refrigerating & A-c Engineers

    EIN 223348612 · Headquarters: Danbury, CT, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  91. American Society of Interior Design Connecticut

    EIN 237417537 · Headquarters: Wilton, CT, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  92. American Society of Media Photographers Inc

    EIN 061428608 · Headquarters: Bloomfield, CT, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  93. American Society of Plumbing Engineers

    EIN 061566246 · Headquarters: Niantic, CT, US · Community Improvement & Capacity Building · Latest available filing year: 2008 · Primary form: IRS Form 990-N

  94. American Statistical Association

    EIN 061277288 · Headquarters: North Haven, CT, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  95. American String Teachers Association Incorporated

    EIN 066042231 · Headquarters: Granby, CT, US · Arts, Culture & Humanities · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  96. American Student Dental Association

    EIN 205422777 · Headquarters: Farmington, CT, US · Education · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  97. American Students for Educational Liberty

    EIN 850756635 · Headquarters: South Windsor, CT, US · Education · Latest available filing year: 2022 · Primary form: IRS Form 990-N

  98. American Supporters of Highgate School Inc

    EIN 800669050 · Headquarters: WILTON, CT, USA · Education · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  99. American Telemedicine Connect Consortium Inc

    EIN 474363573 · Headquarters: Westport, CT, USA · Health Care · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  100. American Turkish Islamic Cultural Center

    EIN 464099467 · Headquarters: Thomaston, CT, US · Arts, Culture & Humanities · Latest available filing year: 2025 · Primary form: IRS Form 990-N

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