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. Society of Plastics Engineers Inc

    EIN 371779002 · Headquarters: Danbury, CT, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  2. Society of Professional Assessors Inc

    EIN 222849328 · Headquarters: Wallingford, CT, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  3. Society of the Descendants of the Founders of Hartford Inc

    EIN 222544181 · Headquarters: West Hartford, CT, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  4. Society of The Founders of Norwich CT Inc

    EIN 060729937 · Headquarters: Norwich, CT, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  5. Society of Utility and Regulatory Financial Analysts Inc

    EIN 521084765 · Headquarters: Wethersfield, CT, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-EZ

  6. Society of Women Engineers

    EIN 061285357 · Headquarters: West Haven, CT, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  7. Society of Women Engineers

    EIN 167482810 · Headquarters: Berlin, CT, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  8. Society St Jean Baptiste of New Britain Inc

    EIN 060540675 · Headquarters: EAST BERLIN, CT, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  9. Sociologists for Women in Society

    EIN 232162891 · Headquarters: SOUTH GLASTONBURY, CT, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  10. Sojourner Ministries

    EIN 431560089 · Headquarters: New Britain, CT, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-EZ

  11. Solar Energy Association of Connecticut Inc

    EIN 061025208 · Headquarters: Glastonbury, CT, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  12. Somers Booster Club Inc

    EIN 222632266 · Headquarters: Somers, CT, US · Unknown & Unclassified · Latest available filing year: 2020 · Primary form: IRS Form 990-N

  13. Somers Little League

    EIN 066068799 · Headquarters: SOMERS, CT, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  14. Somers Parents' Soccer Association Inc

    EIN 222519678 · Headquarters: ENFIELD, CT, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-EZ

  15. Somers Rangers Company

    EIN 462804396 · Headquarters: Somers, CT, US · Unknown & Unclassified · Latest available filing year: 2017 · Primary form: IRS Form 990-N

  16. Somers Senior Citizens Club

    EIN 061286764 · Headquarters: Somers, CT, US · Unknown & Unclassified · Latest available filing year: 2020 · Primary form: IRS Form 990-N

  17. Somers Sportsmen's Association Inc

    EIN 061014292 · Headquarters: SOMERS, CT, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  18. Sommers Cooperative Preschool Inc

    EIN 060845403 · Headquarters: Somers, CT, USA · Unknown & Unclassified · Latest available filing year: 2022 · Primary form: IRS Form 990-EZ

  19. Son of Man Recordings Inc

    EIN 850597321 · Headquarters: WALLINGFORD, CT, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  20. Sonrise Mentorship Corp

    EIN 852188553 · Headquarters: Manchester, CT, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  21. Sons and Daughters of Italy in America

    EIN 222691828 · Headquarters: WETHERSFIELD, CT, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-EZ

  22. Sons of Hermann of the State of Connecticut

    EIN 066090781 · Headquarters: Guilford, CT, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  23. Sons of Hermann of the State of Connecticut

    EIN 237574669 · Headquarters: Meriden, CT, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  24. Sons of Hermann of the State of Connecticut

    EIN 237574678 · Headquarters: CANTON, CT, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  25. Sons of Hermann of the State of Connecticut

    EIN 237574680 · Headquarters: Groton, CT, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  26. Sons of Italy in America

    EIN 061064334 · Headquarters: North Branford, CT, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  27. Sons of Italy in America

    EIN 066045817 · Headquarters: NORWALK, CT, USA · Unknown & Unclassified · Latest available filing year: 2020 · Primary form: IRS Form 990

  28. Sons of Italy in America Supreme Lodge Amerigo Vespucci Lodge No 160 Inc

    EIN 060242910 · Headquarters: DANBURY, CT, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  29. Sons of Norway

    EIN 061301809 · Headquarters: Darien, CT, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  30. Sons of Norway

    EIN 237525689 · Headquarters: Middletown, CT, US · Unknown & Unclassified · Latest available filing year: 2020 · Primary form: IRS Form 990-N

  31. Sons of Union Veterans of the Civil War

    EIN 050475405 · Headquarters: Pawcatuck, CT, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  32. Sons of Union Veterans of the Civil War

    EIN 061099042 · Headquarters: Vernon, CT, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  33. Sons of Union Veterans of the Civil War

    EIN 201216252 · Headquarters: Avon, CT, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  34. Sons of Union Veterans of the Civil War

    EIN 237021662 · Headquarters: Derby, CT, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  35. Sons of Union Veterans of the Civil War

    EIN 237021668 · Headquarters: Vernon, CT, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  36. Sons of Union Veterans of the Civil War

    EIN 371848823 · Headquarters: HARWINTON, CT, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  37. Sons of Union Veterans of the Civil War

    EIN 911851519 · Headquarters: Vernon, CT, US · Unknown & Unclassified · Latest available filing year: 2023 · Primary form: IRS Form 990-N

  38. Sonshine Day Care Center

    EIN 061091239 · Headquarters: Manchester, CT, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  39. Sorenson-Pearson Family Fndtn Inc

    EIN 066099725 · Headquarters: Canton, CT, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-PF

  40. Soroptimist International of the Americas Inc

    EIN 571207482 · Headquarters: Weatogue, CT, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  41. Soroptimist International of the Americas Inc

    EIN 814715115 · Headquarters: Waterford, CT, US · Unknown & Unclassified · Latest available filing year: 2023 · Primary form: IRS Form 990-N

  42. Sound Beach Volunteer Services Foundation Inc

    EIN 061052014 · Headquarters: OLD GREENWICH, CT, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  43. Sound Business Group

    EIN 372114764 · Headquarters: NORWALK, CT, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  44. Sound Shore Pickleball League Inc

    EIN 992394207 · Headquarters: Greenwich, CT, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  45. South Britain Cemetary Association

    EIN 066035438 · Headquarters: SOUTHBURY, CT, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  46. South Burying Ground Association of Kensington Inc

    EIN 066058947 · Headquarters: Kensington, CT, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  47. South Central Chiefs of Police Asso

    EIN 061048839 · Headquarters: NEW HAVEN, CT, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990

  48. South Central CT Regional Economic Dev Corp

    EIN 061455545 · Headquarters: New Haven, CT, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  49. South East Connecticut Community Center of the Blind Inc

    EIN 060945527 · Headquarters: New London, CT, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-EZ

  50. South End Burying Ground Association

    EIN 066037838 · Headquarters: SOUTHINGTON, CT, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  51. South End Community Council of Stratford Inc

    EIN 222553838 · Headquarters: STRATFORD, CT, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  52. South Glastonbury Public Library Association Inc

    EIN 237365075 · Headquarters: South Glastonbury, CT, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  53. South Norwalk Boat Club Inc

    EIN 060542400 · Headquarters: NORWALK, CT, USA · Unknown & Unclassified · Latest available filing year: 2023 · Primary form: IRS Form 990

  54. South Norwalk Community Center Inc

    EIN 060872692 · Headquarters: Norwalk, CT, US · Unknown & Unclassified · Latest available filing year: 2021 · Primary form: IRS Form 990-N

  55. South Windsor Alliance for Progress

    EIN 821274913 · Headquarters: South Windsor, CT, US · Unknown & Unclassified · Latest available filing year: 2020 · Primary form: IRS Form 990-N

  56. South Windsor Cemetery Association

    EIN 060769278 · Headquarters: SOUTH WINDSOR, CT, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990

  57. South Windsor Chamber of Commerce

    EIN 060896726 · Headquarters: SOUTH WINDSOR, CT, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  58. South Windsor Connecticut Education Association

    EIN 237106757 · Headquarters: SOUTH WINDSOR, CT, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  59. South Windsor Cultural Arts Commission

    EIN 237195765 · Headquarters: South Windsor, CT, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  60. South Windsor Historical Society Inc

    EIN 237146776 · Headquarters: SOUTH WINDSOR, CT, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  61. South Windsor Land Conservation Trust

    EIN 510204084 · Headquarters: EAST WINDSOR HILL, CT, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-PF

  62. South Windsor Little League Inc

    EIN 061279172 · Headquarters: SOUTH WINDSOR, CT, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  63. South Windsor Soccer Club Inc

    EIN 061204931 · Headquarters: SOUTH WINDSOR, CT, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  64. South Windsor Youth Hockey Association

    EIN 222943703 · Headquarters: SOUTH WINDSOR, CT, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  65. Southbury Business Association Inc

    EIN 061284511 · Headquarters: SOUTHBURY, CT, US · Unknown & Unclassified · Latest available filing year: 2022 · Primary form: IRS Form 990-N

  66. Southbury Elderly Housing Inc

    EIN 222515002 · Headquarters: SOUTHBURY, CT, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990

  67. Southbury Historical Society Inc

    EIN 061064312 · Headquarters: SOUTHBURY, CT, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990

  68. Southbury Middlebury Scholarship Foundation

    EIN 222471012 · Headquarters: MIDDLEBURY, CT, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  69. Southbury Needy Fund Inc Dba Southbury Helping Hands

    EIN 222704087 · Headquarters: SOUTHBURY, CT, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-EZ

  70. Southeast Asian Hill Tribes Survive Inc

    EIN 132709615 · Headquarters: Bethel, CT, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  71. Southeastern Connecticut Enterprise Region Corp

    EIN 222973506 · Headquarters: GROTON, CT, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  72. Southeastern Connecticut Radio Amateur Mobile Systems

    EIN 061488492 · Headquarters: Waterford, CT, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  73. Southeastern Connecticut Womens Network

    EIN 061441214 · Headquarters: Groton, CT, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  74. Southeastern Ct Youth Hockey Inc

    EIN 061030159 · Headquarters: OAKDALE, CT, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  75. Southeastern Regional Action Council Inc

    EIN 061308487 · Headquarters: NORWICH, CT, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  76. Southern Berkshire Golden Retriever Club Inc

    EIN 061417974 · Headquarters: West Suffield, CT, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  77. Southern California Chapter American Academy Psychiatry & Law

    EIN 223358048 · Headquarters: Bloomfield, CT, US · Unknown & Unclassified · Latest available filing year: 2023 · Primary form: IRS Form 990-N

  78. Southern Connecticut Cycle Club Inc

    EIN 061268190 · Headquarters: New Haven, CT, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  79. Southern Connecticut Health System Properties Inc

    EIN 061297708 · Headquarters: BRIDGEPORT, CT, USA · Unknown & Unclassified · Latest available filing year: 2023 · Primary form: IRS Form 990

  80. Southern Connecticut Ski Council Inc

    EIN 833396450 · Headquarters: Bridgeport, CT, US · Unknown & Unclassified · Latest available filing year: 2019 · Primary form: IRS Form 990-N

  81. Southern Ct Building Owners and Managers Association Inc

    EIN 222610894 · Headquarters: BLOOMFIELD, CT, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  82. Southern Fairfield County Womens Council of Realtors

    EIN 061543732 · Headquarters: FAIRFIELD, CT, US · Unknown & Unclassified · Latest available filing year: 2009 · Primary form: IRS Form 990-N

  83. Southern New England Alumnae Panhellenic

    EIN 461244265 · Headquarters: Wallingford, CT, US · Unknown & Unclassified · Latest available filing year: 2012 · Primary form: IRS Form 990-N

  84. Southern New England Law Librarians Association

    EIN 060979807 · Headquarters: Hartford, CT, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  85. Southern New England Saddlebred Association

    EIN 461961345 · Headquarters: East Hampton, CT, US · Unknown & Unclassified · Latest available filing year: 2020 · Primary form: IRS Form 990-N

  86. Southern New England Womens Golf Association

    EIN 223205902 · Headquarters: Glastonbury, CT, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  87. Southern Society for Pediatric Research Inc

    EIN 596182249 · Headquarters: S Glastonbury, CT, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  88. Southfield Children's Center

    EIN 060906671 · Headquarters: NEWINGTON, CT, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  89. Southington Band Backers Club Inc

    EIN 061095045 · Headquarters: PLANTSVILLE, CT, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-PF

  90. Southington Festival Choir Inc

    EIN 060964217 · Headquarters: Southington, CT, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  91. Southington Land Conservation Trust Inc

    EIN 237285599 · Headquarters: Southington, CT, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  92. Southington Manna Fund Inc

    EIN 300230823 · Headquarters: Southington, CT, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  93. Southington Masonic Temple Corporation

    EIN 061025895 · Headquarters: Southington, CT, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  94. Southington Police Benevolent Assoc

    EIN 061218140 · Headquarters: SOUTHINGTON, CT, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990

  95. Southington Rotary Trust

    EIN 061063364 · Headquarters: Southington, CT, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  96. Southington Southern Youth Athletic

    EIN 061319673 · Headquarters: SOUTHINGTON, CT, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  97. Southington Sportsmen Association

    EIN 222485538 · Headquarters: SOUTHINGTON, CT, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990

  98. Southington United Soccer Club

    EIN 341991533 · Headquarters: Forestville, CT, US · Unknown & Unclassified · Latest available filing year: 2009 · Primary form: IRS Form 990-N

  99. Southington Water Upseu Union

    EIN 275159017 · Headquarters: Southington, CT, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  100. Southmayd Home Inc

    EIN 060646903 · Headquarters: WATERBURY, CT, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-PF

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