Unknown & Unclassified nonprofits in Connecticut

Unknown & Unclassified nonprofits in Connecticut. Browse 7,402 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. Alexander Gregorek Vfw 572

    EIN 465275588 · Headquarters: Thomaston, CT, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  2. Alexander Host Foundation

    EIN 222549698 · Headquarters: GREENWICH, CT, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-PF

  3. Alfa Romeo Owners Club Ct Chapter

    EIN 461942471 · Headquarters: Stamford, CT, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  4. Alfio a Candido Memorial Foundation Inc

    EIN 263743706 · Headquarters: SOUTHBURY, CT, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  5. Alice Sheldon Barton Trust

    EIN 066250029 · Headquarters: Vernon Rockville, CT, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-PF

  6. All Saints Cemetery Association Inc

    EIN 060790128 · Headquarters: WATERBURY, CT, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  7. Allen Research Endowment Inc

    EIN 814117507 · Headquarters: GREENWICH, CT, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-PF

  8. Alliance Francaise of New Haven Inc

    EIN 237029050 · Headquarters: New Haven, CT, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  9. Alliance of Claims Assistance Professionals

    EIN 364213043 · Headquarters: Stamford, CT, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  10. Allied Community Programs Inc

    EIN 060813149 · Headquarters: ENFIELD, CT, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  11. Alpha Chi Epsilon Inc

    EIN 263055592 · Headquarters: Stamford, CT, US · Unknown & Unclassified · Latest available filing year: 2011 · Primary form: IRS Form 990-N

  12. Alpha Delta Kappa Sorority Inc

    EIN 060384281 · Headquarters: Cromwell, CT, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  13. Alpha Epsilon Pi Fraternity

    EIN 061031096 · Headquarters: Storrs Mansfield, CT, US · Unknown & Unclassified · Latest available filing year: 2021 · Primary form: IRS Form 990-N

  14. Alpha Gamma Rho Fraternity

    EIN 510167356 · Headquarters: Storrs, CT, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  15. Alpha Iota Sorority

    EIN 068098226 · Headquarters: Branford, CT, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  16. Alpha Phi Omega

    EIN 061632211 · Headquarters: Hamden, CT, US · Unknown & Unclassified · Latest available filing year: 2023 · Primary form: IRS Form 990-N

  17. Alpha Phi Omega

    EIN 066070350 · Headquarters: STORRS, CT, US · Unknown & Unclassified · Latest available filing year: 2020 · Primary form: IRS Form 990-N

  18. Alpha Phi Omega

    EIN 204319382 · Headquarters: WEST HARTFORD, CT, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  19. Alpha Zeta Omega Pharmaceutical Fraternity

    EIN 060977524 · Headquarters: Storrs, CT, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  20. Alpha Zeta Omega Pharmaceutical Fraternity

    EIN 232071901 · Headquarters: Trumbull, CT, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  21. Alphaomega Charitable Foundation Inc

    EIN 650510147 · Headquarters: GREENWICH, CT, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-PF

  22. Alstom Abb Ce Retirees Club

    EIN 061184784 · Headquarters: Granby, CT, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  23. Alternatives to Violence Project Inc

    EIN 061352476 · Headquarters: Litchfield, CT, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  24. Altruk Vanners Inc

    EIN 061352372 · Headquarters: Woloctt, CT, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  25. Altrusa Club of Ne Ct Foundation

    EIN 061469432 · Headquarters: STORRS, CT, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  26. Altrusa International Inc

    EIN 066107698 · Headquarters: Middletown, CT, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  27. Alumnae Association of Hartford Hospital School of Nursing Inc

    EIN 060664601 · Headquarters: HARTFORD, CT, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  28. Alumni Association of the Hartford Public High School

    EIN 066026028 · Headquarters: EAST HARTFORD, CT, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  29. Alumni Fund Association of Yale University

    EIN 066078326 · Headquarters: New Haven, CT, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  30. Alumni in Support of Yale Opthalmology Inc

    EIN 271984999 · Headquarters: Danbury, CT, US · Unknown & Unclassified · Latest available filing year: 2017 · Primary form: IRS Form 990-N

  31. Am Fed of State County & Municipal Employees 2836 CT Local

    EIN 510213499 · Headquarters: West Haven, CT, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  32. Amalgamated Transit Union

    EIN 060241073 · Headquarters: NORTH HAVEN, CT, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  33. Amalgamated Transit Union

    EIN 060655044 · Headquarters: Stamford, CT, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-EZ

  34. Amalgamated Transit Union

    EIN 521686481 · Headquarters: Derby, CT, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  35. Amalgamated Transit Union Afl-cio-clc Local 1336

    EIN 066082512 · Headquarters: BRIDGEPORT, CT, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990

  36. Amalgamated Transit Union Local 425

    EIN 060241076 · Headquarters: EAST HARTFORD, CT, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  37. Amateur Athletic Union of the United States

    EIN 311175370 · Headquarters: EAST HAVEN, CT, US · Unknown & Unclassified · Latest available filing year: 2023 · Primary form: IRS Form 990-N

  38. Amateur Athletic Union of the United States

    EIN 471861822 · Headquarters: South Windsor, CT, US · Unknown & Unclassified · Latest available filing year: 2019 · Primary form: IRS Form 990-N

  39. Amateur Athletic Union of the United States Inc

    EIN 474828759 · Headquarters: Bristol, CT, US · Unknown & Unclassified · Latest available filing year: 2017 · Primary form: IRS Form 990-N

  40. Amateur Athletic Union of the United States Inc

    EIN 843051408 · Headquarters: Cromwell, CT, US · Unknown & Unclassified · Latest available filing year: 2020 · Primary form: IRS Form 990-N

  41. Amateur Athletic Union of the Us

    EIN 862645374 · Headquarters: MILFORD, CT, USA · Unknown & Unclassified · Latest available filing year: 2020 · Primary form: IRS Form 990-EZ

  42. Amer Fed of St County Muni Employees

    EIN 237062638 · Headquarters: PLAINVILLE, CT, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-EZ

  43. Amercian Legion

    EIN 550871551 · Headquarters: Southbury, CT, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  44. America's First Network Credit Union

    EIN 060944493 · Headquarters: EAST HARTFORD, CT, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  45. American Academy of Matrimonial Lawyers Ct Chapter Aaml C/o David Mcgrath

    EIN 061060466 · Headquarters: HARTFORD, CT, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  46. American Academy of Psychiatry & the Law

    EIN 133223111 · Headquarters: Bloomfield, CT, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  47. American Academy of Psychiatry & the Law

    EIN 382247667 · Headquarters: BLOOMFIELD, CT, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  48. American Academy of Psychiatry & the Law

    EIN 521491301 · Headquarters: Bloomfield, CT, US · Unknown & Unclassified · Latest available filing year: 2022 · Primary form: IRS Form 990-N

  49. American Art Therapy Association Inc

    EIN 061452871 · Headquarters: Shelton, CT, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  50. American Assoc of Franchisees & Dealers

    EIN 336117862 · Headquarters: Enfield, CT, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  51. American Association of Colleges for Teacher Education

    EIN 510232628 · Headquarters: NEW HAVEN, CT, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  52. American Association of Family and Consumer Sciences

    EIN 061362860 · Headquarters: Berlin, CT, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  53. American Association of Neuroscience Nurses

    EIN 812986058 · Headquarters: Shelton, CT, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  54. American Association of Psychiatric Pharmacists

    EIN 461175940 · Headquarters: STORRS, CT, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  55. American Association of the Order of St Lazarus Inc

    EIN 237230009 · Headquarters: RIDGEFIELD, CT, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  56. American Association of Zoo Keepers

    EIN 061284528 · Headquarters: Bridgeport, CT, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  57. 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

  58. American Chemical Society

    EIN 066048676 · Headquarters: FAIRFIELD, CT, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  59. American Chemical Society

    EIN 066068731 · Headquarters: Derby, CT, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  60. American College of Psychoanalysts

    EIN 480813330 · Headquarters: Bloomfield, CT, US · Unknown & Unclassified · Latest available filing year: 2021 · Primary form: IRS Form 990-N

  61. 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

  62. 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

  63. 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

  64. American Destiny Inc

    EIN 392979564 · Headquarters: Trumbull, CT, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  65. 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

  66. 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

  67. 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

  68. 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

  69. 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

  70. American Federation of Government Employees

    EIN 066109847 · Headquarters: Suffield, CT, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  71. 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

  72. 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

  73. 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

  74. 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

  75. 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

  76. 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

  77. 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

  78. 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

  79. 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

  80. 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

  81. 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

  82. 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

  83. 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

  84. 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

  85. 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

  86. 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

  87. 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

  88. 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

  89. 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

  90. 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

  91. 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

  92. 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

  93. 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

  94. 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

  95. 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

  96. 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

  97. 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

  98. 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

  99. 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

  100. 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

First page and all pages