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. Connecticut Small Brand Council

    EIN 455392523 · Headquarters: Old Saybrook, CT, US · Recreation & Sports · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  2. Connecticut Small Business Federation Inc

    EIN 060932296 · Headquarters: Farmington, CT, US · Community Improvement & Capacity Building · Latest available filing year: 2012 · Primary form: IRS Form 990-N

  3. Connecticut Small Business-key to the Future Inc

    EIN 061429048 · Headquarters: East Hartford, CT, US · Community Improvement & Capacity Building · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  4. Connecticut Small Games Club Inc

    EIN 060932847 · Headquarters: Bridgeport, CT, USA · Recreation & Sports · Latest available filing year: 2016 · Primary form: IRS Form 990-EZ

  5. Connecticut Soaring Association Inc

    EIN 453869026 · Headquarters: New London, CT, US · Public & Societal Benefit · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  6. Connecticut Soccer Officials Assn Inc

    EIN 061298501 · Headquarters: mansfield, CT, US · Recreation & Sports · Latest available filing year: 2009 · Primary form: IRS Form 990-N

  7. Connecticut Social Work Oncology Group Inc

    EIN 743260986 · Headquarters: Ridgefield, CT, US · Diseases, Disorders & Medical Disciplines · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  8. Connecticut Society for Cardiac Rehabilitation Inc

    EIN 222586271 · Headquarters: Wallingford, CT, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  9. Connecticut Society for Healthcare Risk Management Inc

    EIN 061465568 · Headquarters: West Hartford, CT, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  10. Connecticut Society of Acupuncturists

    EIN 223950499 · Headquarters: Shelton, CT, US · Community Improvement & Capacity Building · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  11. Connecticut Society of Association Executives Inc

    EIN 222584373 · Headquarters: Niantic, CT, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  12. Connecticut Society of Certified Public Accountants Inc

    EIN 060762300 · Headquarters: Rocky Hill, CT, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  13. Connecticut Society of CPAs Accounting Scholarship Foundation

    EIN 066042593 · Headquarters: Rocky Hill, CT, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  14. Connecticut Society of Enrolled Agents Inc

    EIN 222505223 · Headquarters: MADISON, CT, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  15. Connecticut Society of Eye Physicia C/o Deborah Osborn

    EIN 237452113 · Headquarters: LITCHFIELD, CT, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990

  16. Connecticut Society of Genealogists Inc

    EIN 066105105 · Headquarters: Glastonbury, CT, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990

  17. Connecticut Society of Governmental Accountants

    EIN 061099267 · Headquarters: hartford, CT, US · Public & Societal Benefit · Latest available filing year: 2016 · Primary form: IRS Form 990-N

  18. Connecticut Society of Health-System Pharmacists

    EIN 061052212 · Headquarters: Farmington, CT, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  19. Connecticut Society of Oral & Maxillofacial Surgeons

    EIN 223106703 · Headquarters: BLOOMFIELD, CT, USA · Health Care · Latest available filing year: 2024 · Primary form: IRS Form 990

  20. Connecticut Society of Pathologists

    EIN 920666757 · Headquarters: North Haven, CT, US · Diseases, Disorders & Medical Disciplines · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  21. Connecticut Society of Perianesthesia Nurses Inc

    EIN 461796051 · Headquarters: Cheshire, CT, US · Health Care · Latest available filing year: 2021 · Primary form: IRS Form 990-N

  22. Connecticut Society of Periodontists

    EIN 061095834 · Headquarters: OLD SAYBROOK, CT, USA · Health Care · Latest available filing year: 2025 · Primary form: IRS Form 990-EZ

  23. Connecticut Society of Plastic and Reconstructive Surgeons Inc

    EIN 061048679 · Headquarters: Avon, CT, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  24. Connecticut Society of Portrait Artists

    EIN 030419432 · Headquarters: RIVERSIDE, CT, US · Arts, Culture & Humanities · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  25. Connecticut Society of Professional Engineers Inc

    EIN 060924374 · Headquarters: North Haven, CT, US · Unknown & Unclassified · Latest available filing year: 2023 · Primary form: IRS Form 990-N

  26. Connecticut Society of Professional Journalists

    EIN 066103625 · Headquarters: WOODBRIDGE, CT, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  27. Connecticut Society of Professional Journalists Foundation Inc

    EIN 222892838 · Headquarters: WOODBRIDGE, CT, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  28. Connecticut Society of Radiologic Technologist Inc

    EIN 061581966 · Headquarters: CROMWELL, CT, US · Community Improvement & Capacity Building · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  29. Connecticut Society of Santas Inc

    EIN 461224379 · Headquarters: Bethlehem, CT, US · Human Services · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  30. Connecticut Society of the Sons of the American Revolution

    EIN 066068708 · Headquarters: Old Greenwich, CT, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990

  31. Connecticut Songwriters Association Inc

    EIN 061011256 · Headquarters: Mystic, CT, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  32. Connecticut Spa & Pool Association Inc

    EIN 510138909 · Headquarters: NORWALK, CT, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  33. Connecticut Spectrum Management Association Inc

    EIN 010589299 · Headquarters: Manchester, CT, US · Arts, Culture & Humanities · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  34. Connecticut Speech and Hearing Foundation Inc

    EIN 060983752 · Headquarters: Storrs Mansfield, CT, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  35. Connecticut Speech-language-hearing Association Inc

    EIN 060957671 · Headquarters: SOUTHINGTON, CT, US · Education · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  36. Connecticut Speedskating Inc

    EIN 455624380 · Headquarters: new canaan, CT, US · Recreation & Sports · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  37. Connecticut Spirit Association Inc

    EIN 061496371 · Headquarters: Greenwich, CT, US · Education · Latest available filing year: 2020 · Primary form: IRS Form 990-N

  38. Connecticut Spirit Basketball

    EIN 061601200 · Headquarters: Hartford, CT, USA · Recreation & Sports · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  39. Connecticut Spokebenders Inc

    EIN 861794761 · Headquarters: Meriden, CT, US · Recreation & Sports · Latest available filing year: 2022 · Primary form: IRS Form 990-N

  40. Connecticut Sports Management Group

    EIN 061240550 · Headquarters: MIDDLETOWN, CT, USA · Recreation & Sports · Latest available filing year: 2024 · Primary form: IRS Form 990

  41. Connecticut Sports Writers Alliance Inc

    EIN 061319349 · Headquarters: Enfield, CT, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  42. Connecticut Sportsmens Assoc

    EIN 900126164 · Headquarters: Kensington, CT, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  43. Connecticut Sportsmens Association Berlin Division Inc

    EIN 061455294 · Headquarters: BERLIN, CT, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  44. Connecticut Stage Company

    EIN 932109412 · Headquarters: New Canaan, CT, USA · Arts, Culture & Humanities · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  45. Connecticut Starters Junior Olympics Basketball Inc

    EIN 061239336 · Headquarters: WALLINGFORD, CT, USA · Education · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  46. Connecticut State Afl-cio

    EIN 060303260 · Headquarters: ROCKY HILL, CT, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  47. Connecticut State Association Niulpe Inc

    EIN 760726913 · Headquarters: Northford, CT, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  48. Connecticut State Building Trades Charitable Trust Fund

    EIN 207544142 · Headquarters: EAST HAVEN, CT, USA · Human Services · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  49. Connecticut State Building Trades Council

    EIN 060610495 · Headquarters: EAST HAVEN, CT, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990

  50. Connecticut State Building Trades Training Institute Inc

    EIN 874433919 · Headquarters: HARTFORD, CT, USA · Education · Latest available filing year: 2024 · Primary form: IRS Form 990

  51. Connecticut State Chapter of the Asmbs Inc

    EIN 455273084 · Headquarters: REDDING, CT, USA · Community Improvement & Capacity Building · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  52. Connecticut State Chapter of the Ntl Emergency Number Assn

    EIN 352494122 · Headquarters: PROSPECT, CT, US · Public & Societal Benefit · Latest available filing year: 2014 · Primary form: IRS Form 990-N

  53. Connecticut State Chess Association Inc

    EIN 832956048 · Headquarters: WEST HARTFORD, CT, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  54. Connecticut State Colleges and University Foundation Inc

    EIN 222647004 · Headquarters: Voluntown, CT, US · Education · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  55. Connecticut State Conference Aaup

    EIN 061144749 · Headquarters: New Milford, CT, US · Education · Latest available filing year: 2023 · Primary form: IRS Form 990-N

  56. Connecticut State Council Knights of Columbus Charitable Trust

    EIN 237122064 · Headquarters: BRISTOL, CT, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  57. Connecticut State Council of Ena Megan Petrucelli

    EIN 222695835 · Headquarters: CROMWELL, CT, USA · Education · Latest available filing year: 2025 · Primary form: IRS Form 990-EZ

  58. Connecticut State Dental Association Inc

    EIN 060605831 · Headquarters: SOUTHINGTON, CT, USA · Community Improvement & Capacity Building · Latest available filing year: 2024 · Primary form: IRS Form 990

  59. Connecticut State Dental Association Inc

    EIN 060996515 · Headquarters: Torrington, CT, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  60. Connecticut State Dental Association Inc

    EIN 061497310 · Headquarters: Waterbury, CT, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  61. Connecticut State Dental Association Inc

    EIN 061528042 · Headquarters: Milford, CT, US · Community Improvement & Capacity Building · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  62. Connecticut State Dental Association Inc

    EIN 066078172 · Headquarters: Fairfield, CT, US · Unknown & Unclassified · Latest available filing year: 2020 · Primary form: IRS Form 990-N

  63. Connecticut State Dental Association Inc

    EIN 237326713 · Headquarters: Fairfield, CT, US · Diseases, Disorders & Medical Disciplines · Latest available filing year: 2009 · Primary form: IRS Form 990-N

  64. Connecticut State Dental Foundation Inc

    EIN 223109687 · Headquarters: Southington, CT, USA · Community Improvement & Capacity Building · Latest available filing year: 2024 · Primary form: IRS Form 990-PF

  65. Connecticut State Electrology Association Incorporated

    EIN 753082748 · Headquarters: Ridgefield, CT, US · Health Care · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  66. Connecticut State Employees Assn

    EIN 060916888 · Headquarters: Hartford, CT, US · Employment · Latest available filing year: 2017 · Primary form: IRS Form 990-N

  67. Connecticut State Employees Assn

    EIN 066140447 · Headquarters: HARTFORD, CT, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  68. Connecticut State Employees Assn

    EIN 264831651 · Headquarters: Hartford, CT, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  69. Connecticut State Employees Assn

    EIN 270944986 · Headquarters: Hartford, CT, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  70. Connecticut State Employees Assn

    EIN 271498267 · Headquarters: Hartford, CT, US · Unknown & Unclassified · Latest available filing year: 2022 · Primary form: IRS Form 990-N

  71. Connecticut State Employees Assn

    EIN 271639182 · Headquarters: Hartford, CT, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  72. Connecticut State Employees Assn

    EIN 272227516 · Headquarters: Hartford, CT, US · Employment · Latest available filing year: 2014 · Primary form: IRS Form 990-N

  73. Connecticut State Employees Assn

    EIN 272458598 · Headquarters: Hartford, CT, US · Employment · Latest available filing year: 2010 · Primary form: IRS Form 990-N

  74. Connecticut State Employees Assn

    EIN 272999025 · Headquarters: Hartford, CT, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  75. Connecticut State Employees Assocation

    EIN 460701451 · Headquarters: Hartford, CT, US · Education · Latest available filing year: 2019 · Primary form: IRS Form 990-N

  76. Connecticut State Employees Association

    EIN 060305224 · Headquarters: HARTFORD, CT, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  77. Connecticut State Employees Association

    EIN 060953455 · Headquarters: Hartford, CT, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  78. Connecticut State Employees Association

    EIN 060970207 · Headquarters: Hartford, CT, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  79. Connecticut State Employees Association

    EIN 060972165 · Headquarters: Hartford, CT, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  80. Connecticut State Employees Association

    EIN 061022449 · Headquarters: Hartford, CT, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  81. Connecticut State Employees Association

    EIN 061094380 · Headquarters: Hartford, CT, US · Community Improvement & Capacity Building · Latest available filing year: 2007 · Primary form: IRS Form 990-N

  82. Connecticut State Employees Association

    EIN 061094382 · Headquarters: Hartford, CT, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  83. Connecticut State Employees Association

    EIN 061094384 · Headquarters: Hartford, CT, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  84. Connecticut State Employees Association

    EIN 061297652 · Headquarters: Hartford, CT, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  85. Connecticut State Employees Association

    EIN 061364818 · Headquarters: Hartford, CT, US · Education · Latest available filing year: 2022 · Primary form: IRS Form 990-N

  86. Connecticut State Employees Association

    EIN 061438663 · Headquarters: Hartford, CT, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  87. Connecticut State Employees Association

    EIN 061438665 · Headquarters: Hartford, CT, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  88. Connecticut State Employees Association

    EIN 061438666 · Headquarters: Hartford, CT, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  89. Connecticut State Employees Association

    EIN 061438667 · Headquarters: Hartford, CT, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  90. Connecticut State Employees Association

    EIN 061438669 · Headquarters: Hartford, CT, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  91. Connecticut State Employees Association

    EIN 061438670 · Headquarters: Hartford, CT, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  92. Connecticut State Employees Association

    EIN 061530735 · Headquarters: Hartford, CT, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  93. Connecticut State Employees Association

    EIN 061583915 · Headquarters: Hartford, CT, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  94. Connecticut State Employees Association

    EIN 161659377 · Headquarters: Hartford, CT, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  95. Connecticut State Employees Association

    EIN 201341598 · Headquarters: Hartford, CT, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  96. Connecticut State Employees Association

    EIN 208775346 · Headquarters: Hartford, CT, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  97. Connecticut State Employees Association

    EIN 237134422 · Headquarters: Hartford, CT, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  98. Connecticut State Employees Association

    EIN 237137776 · Headquarters: Hartford, CT, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  99. Connecticut State Employees Association

    EIN 237150521 · Headquarters: Hartford, CT, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  100. Connecticut State Employees Association

    EIN 237150526 · Headquarters: Hartford, CT, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

First page and all pages