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. Southport Area Association Inc

    EIN 066054529 · Headquarters: SOUTHPORT, CT, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  2. Southport Area Fund

    EIN 222599664 · Headquarters: SOUTHPORT, CT, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-PF

  3. Southwest Community Health Center Inc

    EIN 061023013 · Headquarters: BRIDGEPORT, CT, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  4. Southwestern Connecticut Emergency Med Serv Adv Council Inc

    EIN 060950201 · Headquarters: Fairfield, CT, US · Unknown & Unclassified · Latest available filing year: 2019 · Primary form: IRS Form 990-N

  5. Southwestern Regional Communications Center Inc

    EIN 061135253 · Headquarters: SHELTON, CT, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  6. Southwick Hybrids

    EIN 815356598 · Headquarters: Broad Brook, CT, US · Unknown & Unclassified · Latest available filing year: 2017 · Primary form: IRS Form 990-N

  7. Spanish American Merchants Association Inc

    EIN 061390672 · Headquarters: HARTFORD, CT, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  8. Spay and Neuter Association of Newtown Inc

    EIN 061074334 · Headquarters: Newtown, CT, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  9. Special Education Equity for Kids of Connecticut Inc

    EIN 821559291 · Headquarters: MYSTIC, CT, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-EZ

  10. Special Olympics Connecticut Inc

    EIN 237099756 · Headquarters: HAMDEN, CT, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  11. Special Wishes Inc

    EIN 222776048 · Headquarters: Oakville, CT, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  12. Spg Foundation Inc

    EIN 883969287 · Headquarters: SHELTON, CT, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  13. Sphere Consortium Inc

    EIN 237014582 · Headquarters: Suffield, CT, USA · Unknown & Unclassified · Latest available filing year: 2023 · Primary form: IRS Form 990-EZ

  14. Sphere Inc

    EIN 222968009 · Headquarters: RIDGEFIELD, CT, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990

  15. Sphinx Shriners

    EIN 060544940 · Headquarters: NEWINGTON, CT, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  16. Sphinx Shriners Main Return

    EIN 510220492 · Headquarters: NEWINGTON, CT, USA · Unknown & Unclassified · Latest available filing year: 2022 · Primary form: IRS Form 990

  17. Spiritualist Church of Peace & Light

    EIN 275535003 · Headquarters: New London, CT, US · Unknown & Unclassified · Latest available filing year: 2019 · Primary form: IRS Form 990-N

  18. Sportmens Athletic Club of Hartford Ct Inc

    EIN 061019167 · Headquarters: Hartford, CT, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-EZ

  19. Sprague Rod & Gun Club Inc

    EIN 060636979 · Headquarters: BALTIC, CT, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  20. Spring Glen Civic Association Inc

    EIN 061207424 · Headquarters: Hamden, CT, US · Unknown & Unclassified · Latest available filing year: 2021 · Primary form: IRS Form 990-N

  21. Spring Glen School Pta

    EIN 061245115 · Headquarters: Hamden, CT, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  22. Spring Grove Cemetery Association

    EIN 060545670 · Headquarters: Darien, CT, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  23. Spring Grove Cemetery Association

    EIN 060660457 · Headquarters: HARTFORD, CT, USA · Unknown & Unclassified · Latest available filing year: 2020 · Primary form: IRS Form 990

  24. Springdale Fire Company Inc

    EIN 060545784 · Headquarters: STAMFORD, CT, USA · Unknown & Unclassified · Latest available filing year: 2023 · Primary form: IRS Form 990

  25. St Casimirs Lithuanian Society Inc

    EIN 060643181 · Headquarters: WINDSOR, CT, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-EZ

  26. St Catherine Center for Special Needs Inc

    EIN 472207552 · Headquarters: FAIRFIELD, CT, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  27. St Clement's Foundation

    EIN 061435991 · Headquarters: PORTLAND, CT, USA · Unknown & Unclassified · Latest available filing year: 2023 · Primary form: IRS Form 990-T

  28. St John the Baptist Greek Catholic Cemetery Assoc Inc

    EIN 060617397 · Headquarters: STRATFORD, CT, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  29. St John Urban Development Corporation

    EIN 060834802 · Headquarters: Stamford, CT, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  30. St John's Housing Corporation

    EIN 060950850 · Headquarters: TOLLAND, CT, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  31. St Joseph Polish Society of Colchester Incorporated

    EIN 060660460 · Headquarters: COLCHESTER, CT, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990

  32. St Jude Housing Corporation

    EIN 222578187 · Headquarters: NORWICH, CT, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  33. St Lucian's Residence Inc

    EIN 061520463 · Headquarters: New Britain, CT, USA · Unknown & Unclassified · Latest available filing year: 2023 · Primary form: IRS Form 990

  34. St Lucy of Sircusa Mutual Benefit

    EIN 061071984 · Headquarters: Glastonbury, CT, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  35. St Lukes Lodge 48

    EIN 066042401 · Headquarters: WALLINGFORD, CT, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-EZ

  36. St Marks Day-care Center Inc

    EIN 060862926 · Headquarters: BRIDGEPORT, CT, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990

  37. St Mary's Hospital Foundation Inc

    EIN 222528400 · Headquarters: HARTFORD, CT, USA · Unknown & Unclassified · Latest available filing year: 2023 · Primary form: IRS Form 990

  38. St Marys Catholic Club Inc

    EIN 066045194 · Headquarters: Meriden, CT, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-EZ

  39. St Paul's Housing Corporation

    EIN 237158724 · Headquarters: SOUTHINGTON, CT, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990

  40. St Paul's Nursery School Inc

    EIN 061216077 · Headquarters: WALLINGFORD, CT, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-EZ

  41. St Peter & St Paul Benevolent Association of Ansonia CT

    EIN 066049465 · Headquarters: Ansonia, CT, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  42. St Peter Drum Corp Inc

    EIN 237315026 · Headquarters: new hartford, CT, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  43. St Peter's Cemetary Improvement Associa

    EIN 060737770 · Headquarters: AMSTON, CT, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-EZ

  44. St Peters Society

    EIN 066049405 · Headquarters: KENSINGTON, CT, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  45. St Peters Temple Association Inc of New Milford

    EIN 237425468 · Headquarters: New Milford, CT, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  46. St Therese Lisieux Council 8013

    EIN 364779832 · Headquarters: TRUMBULL, CT, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  47. St Thomas Day School Inc

    EIN 060736072 · Headquarters: NEW HAVEN, CT, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  48. St Thomas More School Inc

    EIN 060876084 · Headquarters: Oakdale, CT, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  49. St Vincent De Paul Place Norwich Inc

    EIN 371639042 · Headquarters: NORWICH, CT, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  50. St Vincent Depaul Middletown

    EIN 061387081 · Headquarters: MIDDLETOWN, CT, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  51. St Vincent's Development Inc

    EIN 222554128 · Headquarters: Trumbull, CT, USA · Unknown & Unclassified · Latest available filing year: 2023 · Primary form: IRS Form 990

  52. St Vincent's Special Needs Center Inc

    EIN 060702617 · Headquarters: Trumbull, CT, USA · Unknown & Unclassified · Latest available filing year: 2023 · Primary form: IRS Form 990

  53. Stac Co

    EIN 990590458 · Headquarters: Salisbury, CT, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  54. Staff Retirement Holdings Inc

    EIN 061559156 · Headquarters: New Haven, CT, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  55. Staff Union of Connecticut

    EIN 061079875 · Headquarters: Rocky HIll, CT, US · Unknown & Unclassified · Latest available filing year: 2022 · Primary form: IRS Form 990-N

  56. Stafford Administrators Association

    EIN 471129234 · Headquarters: Stafford Springs, CT, US · Unknown & Unclassified · Latest available filing year: 2014 · Primary form: IRS Form 990-N

  57. Stafford Boys Club Inc

    EIN 066045404 · Headquarters: STAFFORD SPRINGS, CT, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  58. Stafford Fish & Game Club Inc

    EIN 061098547 · Headquarters: STAFFORD SPRINGS, CT, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  59. Stafford Library Association

    EIN 060646908 · Headquarters: STAFFORD SPRINGS, CT, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  60. Stafford Springs Cemetery Assoc

    EIN 060546385 · Headquarters: Pomfret Center, CT, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  61. Stamford Administrative Unit

    EIN 222487581 · Headquarters: STAMFORD, CT, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-EZ

  62. Stamford Amateur Radio Association Incorporated

    EIN 222511899 · Headquarters: Stamford, CT, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  63. Stamford Art Association Inc

    EIN 237111511 · Headquarters: Stamford, CT, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-EZ

  64. Stamford Board of Realtors Inc

    EIN 060795109 · Headquarters: STAMFORD, CT, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  65. Stamford Chamber of Commerce Inc

    EIN 222506549 · Headquarters: STAMFORD, CT, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  66. Stamford Cross Road Residences Inc

    EIN 222538947 · Headquarters: NORTH HAVEN, CT, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  67. Stamford Education Association

    EIN 060712064 · Headquarters: STAMFORD, CT, US · Unknown & Unclassified · Latest available filing year: 2023 · Primary form: IRS Form 990-N

  68. Stamford Emergency Medical Services Inc

    EIN 222757306 · Headquarters: STAMFORD, CT, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  69. Stamford Eruv Inc

    EIN 061086077 · Headquarters: Stamford, CT, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  70. Stamford Healthcare Credit Union Inc

    EIN 060991086 · Headquarters: STAMFORD, CT, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990

  71. Stamford Kiwanis Trust Fund

    EIN 066038976 · Headquarters: Stamford, CT, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  72. Stamford Little League

    EIN 061449574 · Headquarters: STAMFORD, CT, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  73. Stamford Municipal Nurses Association

    EIN 455279834 · Headquarters: Stamford, CT, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  74. Stamford North Little League

    EIN 472778163 · Headquarters: STAMFORD, CT, USA · Unknown & Unclassified · Latest available filing year: 2022 · Primary form: IRS Form 990-EZ

  75. Stamford Paramedic Association - Iaep Local 684

    EIN 061445970 · Headquarters: STAMFORD, CT, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  76. Stamford Partnership Inc

    EIN 060993590 · Headquarters: STAMFORD, CT, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  77. Stamford Photography Club

    EIN 472232462 · Headquarters: WESTON, CT, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  78. Stamford Police Association Inc

    EIN 066069059 · Headquarters: Stamford, CT, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  79. Stamford Spartans Youth Football Inc

    EIN 862019554 · Headquarters: STAMFORD, CT, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  80. Stamford St Andrew's - the Ferguson Tr C/o the Episcopal Church in Connecticut

    EIN 066041829 · Headquarters: MERIDEN, CT, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  81. Stamford Woman's Club Inc

    EIN 060653184 · Headquarters: STAMFORD, CT, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-PF

  82. Stamford Womens Golf Assn Inc

    EIN 833529333 · Headquarters: STAMFORD, CT, US · Unknown & Unclassified · Latest available filing year: 2020 · Primary form: IRS Form 990-N

  83. Stamford Yacht Club

    EIN 060547390 · Headquarters: STAMFORD, CT, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  84. Stamford Youth Soccer League

    EIN 061004370 · Headquarters: GREENWICH, CT, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  85. Stanley and Catherine Maas Foundati

    EIN 112690167 · Headquarters: WESTPORT, CT, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-PF

  86. Stanley L Richter Association for the Arts Inc

    EIN 237102777 · Headquarters: Danbury, CT, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  87. Staples Free School Trust

    EIN 066038707 · Headquarters: Easton, CT, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-PF

  88. Staples High School Pta C/o Michelle Macris

    EIN 060994415 · Headquarters: WESTPORT, CT, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  89. Staples Softball Booster Club

    EIN 900672049 · Headquarters: westport, CT, US · Unknown & Unclassified · Latest available filing year: 2013 · Primary form: IRS Form 990-N

  90. Starfleet Uss Charter Oak Club

    EIN 922781890 · Headquarters: New London, CT, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  91. State Condo Management Inc

    EIN 470938125 · Headquarters: NEW HAVEN, CT, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  92. State Police Credit Union

    EIN 060762028 · Headquarters: MERIDEN, CT, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990

  93. Stepney Volunteer Fire Company #1 of Ct

    EIN 066051565 · Headquarters: MONROE, CT, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  94. Stepup Ed Inc

    EIN 922820273 · Headquarters: Hamden, CT, US · Unknown & Unclassified · Latest available filing year: 2023 · Primary form: IRS Form 990-N

  95. Sterling Road Association Inc

    EIN 061260521 · Headquarters: Greenwich, CT, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  96. Sterling Ski Club Inc

    EIN 061099438 · Headquarters: STRATFORD, CT, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  97. Sterling Volunteer Fire Company Inc

    EIN 222473967 · Headquarters: Sterling, CT, US · Unknown & Unclassified · Latest available filing year: 2021 · Primary form: IRS Form 990-N

  98. Stew Leonard Iii Water Safety Fd Inc

    EIN 223264276 · Headquarters: NORWALK, CT, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  99. Stewart Foundation

    EIN 136162897 · Headquarters: NEW CANAAN, CT, USA · Unknown & Unclassified · Latest available filing year: 2023 · Primary form: IRS Form 990-PF

  100. Stillman Foundation Inc

    EIN 061108752 · Headquarters: Stamford, CT, USA · Unknown & Unclassified · Latest available filing year: 2021 · Primary form: IRS Form 990-PF

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