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. Ancient Free & Accepted Masons of Connecticut

    EIN 066060658 · Headquarters: Brooklyn, CT, US · Unknown & Unclassified · Latest available filing year: 2022 · Primary form: IRS Form 990-N

  2. Ancient Free & Accepted Masons of Connecticut

    EIN 066060877 · Headquarters: Windsor, CT, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  3. Ancient Free & Accepted Masons of Connecticut

    EIN 066065063 · Headquarters: Stratford, CT, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  4. Ancient Free & Accepted Masons of Connecticut

    EIN 066088010 · Headquarters: Niantic, CT, US · Unknown & Unclassified · Latest available filing year: 2020 · Primary form: IRS Form 990-N

  5. Ancient Free & Accepted Masons of Connecticut

    EIN 066137636 · Headquarters: Branford, CT, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  6. Ancient Free & Accepted Masons of Connecticut

    EIN 237104401 · Headquarters: West Hartford, CT, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  7. Ancient Free & Accepted Masons of Connecticut

    EIN 237107004 · Headquarters: Willimantic, CT, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  8. Ancient Free & Accepted Masons of Connecticut

    EIN 237107639 · Headquarters: Niantic, CT, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990

  9. Ancient Free & Accepted Masons of Connecticut

    EIN 237107861 · Headquarters: Collinsville, CT, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  10. Ancient Free & Accepted Masons of Connecticut

    EIN 237107862 · Headquarters: GUILFORD, CT, US · Unknown & Unclassified · Latest available filing year: 2023 · Primary form: IRS Form 990-N

  11. Ancient Free & Accepted Masons of Connecticut

    EIN 237107865 · Headquarters: Thompson, CT, US · Unknown & Unclassified · Latest available filing year: 2021 · Primary form: IRS Form 990-N

  12. Ancient Free & Accepted Masons of Connecticut

    EIN 237110837 · Headquarters: Danbury, CT, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  13. Ancient Free & Accepted Masons of Connecticut

    EIN 237120528 · Headquarters: Shelton, CT, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  14. Ancient Free & Accepted Masons of Connecticut

    EIN 237131464 · Headquarters: Old Saybrook, CT, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  15. Ancient Free & Accepted Masons of Connecticut

    EIN 237144282 · Headquarters: Newington, CT, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990

  16. Ancient Free & Accepted Masons of Connecticut

    EIN 237144290 · Headquarters: Unionville, CT, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  17. Ancient Free & Accepted Masons of Connecticut

    EIN 237144291 · Headquarters: Norwalk, CT, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  18. Ancient Free & Accepted Masons of Connecticut

    EIN 237144292 · Headquarters: Woodbury, CT, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  19. Ancient Free & Accepted Masons of Connecticut

    EIN 237144293 · Headquarters: WALLINGFORD, CT, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  20. Ancient Free & Accepted Masons of Connecticut

    EIN 237144294 · Headquarters: Sandy Hook, CT, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  21. Ancient Free & Accepted Masons of Connecticut

    EIN 237144300 · Headquarters: PORTLAND, CT, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  22. Ancient Free & Accepted Masons of Connecticut

    EIN 237144302 · Headquarters: Norfolk, CT, US · Unknown & Unclassified · Latest available filing year: 2020 · Primary form: IRS Form 990-N

  23. Ancient Free & Accepted Masons of Connecticut

    EIN 237144303 · Headquarters: New Canaan, CT, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  24. Ancient Free & Accepted Masons of Connecticut

    EIN 237144306 · Headquarters: NEW HAVEN, CT, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  25. Ancient Free & Accepted Masons of Connecticut

    EIN 237144310 · Headquarters: New Haven, CT, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  26. Ancient Free & Accepted Masons of Connecticut

    EIN 237149844 · Headquarters: Vernon, CT, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  27. Ancient Free & Accepted Masons of Connecticut

    EIN 237151685 · Headquarters: TORRINGTON, CT, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  28. Ancient Free & Accepted Masons of Connecticut

    EIN 237154791 · Headquarters: Stratford, CT, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  29. Ancient Free & Accepted Masons of Connecticut

    EIN 237537883 · Headquarters: Westport, CT, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  30. Ancient Free & Accepted Masons of Connecticut

    EIN 371712079 · Headquarters: New Haven, CT, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  31. Ancient Free & Accepted Masons of Connecticut

    EIN 593788303 · Headquarters: Pawcatuck, CT, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990

  32. Ancient Free & Accepted Masons of Conneticut

    EIN 066062154 · Headquarters: Manchester, CT, US · Unknown & Unclassified · Latest available filing year: 2022 · Primary form: IRS Form 990-N

  33. Ancient Free & Accepted Masons of CT

    EIN 066057166 · Headquarters: Danbury, CT, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-EZ

  34. Ancient Free & Accepted Masons of Ct Grand Lodge

    EIN 060243277 · Headquarters: WALLINGFORD, CT, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  35. Ancient Free & Accepted Masons of Ct Grand Lodge 11 St Pauls Lodge

    EIN 066036107 · Headquarters: LITCHFIELD, CT, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  36. Ancient Free & Accepted Masons of the Ct Grand Lodge 145 Friendship Tuscan

    EIN 260607927 · Headquarters: MANCHESTER, CT, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  37. Ancient Free Accepted Masons of Con

    EIN 066053415 · Headquarters: Cornwall, CT, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  38. Ancient Free and Accepted Masons of Connecticut

    EIN 853931608 · Headquarters: Wallingford, CT, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  39. Ancient Mystical Order of Rosae Crucis

    EIN 042588477 · Headquarters: East Hartford, CT, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  40. Ancient Order of Hibernians in America

    EIN 066101164 · Headquarters: Danbury, CT, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  41. Ancient Order of Hibernians in America

    EIN 542093612 · Headquarters: Fairfield, CT, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  42. Ancient Order of Hibernians in America

    EIN 811409779 · Headquarters: Glsatonbury, CT, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  43. Ancient Order of Hibernians in America 06 Fa 02 Parent Org Gen 0832

    EIN 141869699 · Headquarters: STAMFORD, CT, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  44. Ancient Order of Hibernians Naugatuck Division

    EIN 060955058 · Headquarters: NAUGATUCK, CT, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  45. Anderson-Paffard Foundation Inc

    EIN 061047468 · Headquarters: New London, CT, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-PF

  46. Andover Friends of the Library Inc

    EIN 223056227 · Headquarters: Andover, CT, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  47. Andover Hebron Marlborough Youth and Family Services Inc

    EIN 222595584 · Headquarters: HEBRON, CT, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  48. Andover Lake Property Owners Association Inc

    EIN 066069082 · Headquarters: Andover, CT, USA · Unknown & Unclassified · Latest available filing year: 2023 · Primary form: IRS Form 990

  49. Andover Sportsmans Club Inc

    EIN 222630170 · Headquarters: ANDOVER, CT, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990

  50. Andrew J & Anita G Frankel Family Foundation Inc

    EIN 136167961 · Headquarters: STAMFORD, CT, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-PF

  51. Andrew J Knuth Family Charitable Trust

    EIN 817001072 · Headquarters: WESTON, CT, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-PF

  52. Andrew Morehouse Trust Assn Inc

    EIN 352228640 · Headquarters: NEW HAVEN, CT, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  53. Angeles T Arredondo Foundation

    EIN 133100869 · Headquarters: STAMFORD, CT, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-PF

  54. Animal Rights Alliance Inc

    EIN 222882521 · Headquarters: Cos Cob, CT, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  55. Animal Welfare League of New London

    EIN 066086758 · Headquarters: GROTON, CT, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990

  56. Anna E Nolan Tuw Scholarship Fund

    EIN 066169905 · Headquarters: WATERBURY, CT, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-PF

  57. Anna M Fulling Chaplaincy Fund

    EIN 066023883 · Headquarters: WATERBURY, CT, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-PF

  58. Annual Multicultural Business Youth Educational Services

    EIN 222573324 · Headquarters: DANBURY, CT, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  59. Ansonia Community Organic Gardeners Inc

    EIN 300595575 · Headquarters: Ansonia, CT, US · Unknown & Unclassified · Latest available filing year: 2016 · Primary form: IRS Form 990-N

  60. Ansonia Federation of Education Personnel

    EIN 992034789 · Headquarters: Ansonia, CT, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  61. Ansonia Federation of Teachers C/o Pamela Mudry

    EIN 066083844 · Headquarters: ANSONIA, CT, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  62. Ansonia Rod & Gun Club

    EIN 066069233 · Headquarters: ANSONIA, CT, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  63. Ansonia Soccer Club Inc

    EIN 833318034 · Headquarters: ANSONIA, CT, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  64. Anti-racism in Action Inc

    EIN 853904390 · Headquarters: New Haven, CT, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  65. Antique Carriage and Sleigh Museum Inc

    EIN 800685596 · Headquarters: Salem, CT, US · Unknown & Unclassified · Latest available filing year: 2023 · Primary form: IRS Form 990-N

  66. Apex Community Care Inc

    EIN 222951387 · Headquarters: DANBURY CT, CT, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  67. Apic New England

    EIN 510152160 · Headquarters: OAKVILLE, CT, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-EZ

  68. Apics Hartford County Chapter 6 Inc

    EIN 061026254 · Headquarters: HARTFORD, CT, US · Unknown & Unclassified · Latest available filing year: 2020 · Primary form: IRS Form 990-N

  69. Apostle Immigrant Services

    EIN 271023812 · Headquarters: NEW HAVEN, CT, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  70. Apostles of the Sacred Heart Clelian Center Inc

    EIN 061316459 · Headquarters: Hamden, CT, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  71. Apostolate of the Mass Inc

    EIN 061264858 · Headquarters: WALLINGFORD, CT, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-PF

  72. Apostolic Resource Center Inc

    EIN 900490110 · Headquarters: Old Saybrook, CT, US · Unknown & Unclassified · Latest available filing year: 2021 · Primary form: IRS Form 990-N

  73. Arabelle a Meigs Hull Trust Uw Fbo Henry

    EIN 066020947 · Headquarters: ESSEX, CT, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-PF

  74. Arabian Horse Club of Ct

    EIN 222540726 · Headquarters: WALLINGFORD, CT, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-EZ

  75. Archaeological Associates of Greenwich Inc

    EIN 061059394 · Headquarters: Greenwich, CT, US · Unknown & Unclassified · Latest available filing year: 2020 · Primary form: IRS Form 990-N

  76. Archaeological Society of Connecticut Inc

    EIN 066063418 · Headquarters: Wethersfield, CT, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  77. Archbishop Henry J O Brien Assembly No 2002

    EIN 261974208 · Headquarters: Unionville, CT, US · Unknown & Unclassified · Latest available filing year: 2009 · Primary form: IRS Form 990-N

  78. Archdiocese of Hartford Investment Trust

    EIN 651247825 · Headquarters: BLOOMFIELD, CT, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-T

  79. Architecture Initiative Inc

    EIN 810786173 · Headquarters: New Haven, CT, US · Unknown & Unclassified · Latest available filing year: 2019 · Primary form: IRS Form 990-N

  80. Arena Parents Club Inc

    EIN 061073498 · Headquarters: STAMFORD, CT, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-EZ

  81. Ari of Connecticut Inc

    EIN 060712017 · Headquarters: STAMFORD, CT, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  82. Ark Education Initiative Inc Fka Innovation Foundation Inc

    EIN 854306455 · Headquarters: WILTON, CT, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-PF

  83. Arkaios

    EIN 471929929 · Headquarters: Avon, CT, US · Unknown & Unclassified · Latest available filing year: 2014 · Primary form: IRS Form 990-N

  84. Arm and Leg Inc

    EIN 812817177 · Headquarters: Hartford, CT, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  85. ArmonkYouthSports FoundationLtd

    EIN 262495986 · Headquarters: New Fairfield, CT, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  86. Armstrong Retirement Outing Committee

    EIN 472283549 · Headquarters: West Haven, CT, US · Unknown & Unclassified · Latest available filing year: 2017 · Primary form: IRS Form 990-N

  87. Army Aviation Association of America

    EIN 384090274 · Headquarters: Monroe, CT, US · Unknown & Unclassified · Latest available filing year: 2021 · Primary form: IRS Form 990-N

  88. Army Aviation Association of America Inc

    EIN 061353034 · Headquarters: Monroe, CT, US · Unknown & Unclassified · Latest available filing year: 2023 · Primary form: IRS Form 990-N

  89. Army Aviation Association of America Inc

    EIN 066041235 · Headquarters: MONROE, CT, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  90. Army Aviation Association of America Inc

    EIN 320568519 · Headquarters: Monroe, CT, US · Unknown & Unclassified · Latest available filing year: 2018 · Primary form: IRS Form 990-N

  91. Army Aviation Association of America Inc

    EIN 384035212 · Headquarters: Monroe, CT, US · Unknown & Unclassified · Latest available filing year: 2021 · Primary form: IRS Form 990-N

  92. Army Aviation Association of America Inc Air Assault Chapter

    EIN 237293387 · Headquarters: MONROE, CT, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  93. Army Aviation Association of America Inc Alaskan Midnight Sun Chapter

    EIN 301437663 · Headquarters: MONROE, CT, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  94. Army Aviation Association of America Inc Aloha Chapter of Hawaii

    EIN 237118309 · Headquarters: MONROE, CT, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  95. Army Aviation Association of America Inc Arizona Chapter

    EIN 061170305 · Headquarters: MONROE, CT, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  96. Army Aviation Association of America Inc Aviation Center Chapter

    EIN 636057171 · Headquarters: MONROE, CT, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  97. Army Aviation Association of America Inc Badger Chapter

    EIN 320378979 · Headquarters: MONROE, CT, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  98. Army Aviation Association of America Inc Battle Born Chapter

    EIN 352629528 · Headquarters: MONROE, CT, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  99. Army Aviation Association of America Inc Bavarian Chapter

    EIN 061407751 · Headquarters: MONROE, CT, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  100. Army Aviation Association of America Inc Bayou Chapter

    EIN 611843444 · Headquarters: MONROE, CT, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

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