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. Society for Consciousness Studies

    EIN 825193454 · Headquarters: WEST HARTFORD, CT, US · Education · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  2. Society for Experimental Mechanics

    EIN 060763080 · Headquarters: BETHEL, CT, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  3. Society for Human Resources Management of Western Connecticut

    EIN 061261227 · Headquarters: Berlin, CT, US · Community Improvement & Capacity Building · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  4. Society for Information Management Fairfield Westchester Inc

    EIN 274654498 · Headquarters: STRATFORD, CT, USA · Community Improvement & Capacity Building · Latest available filing year: 2025 · Primary form: IRS Form 990-EZ

  5. Society for Nondestructive Testing Inc Connecticut Valley Section

    EIN 066078535 · Headquarters: WINDSOR LOCKS, CT, US · Science & Technology · Latest available filing year: 2018 · Primary form: IRS Form 990-N

  6. Society for Preservation & Encourmt of Barbershop Quartet Singing Amer

    EIN 060624722 · Headquarters: Mystic, CT, US · Unknown & Unclassified · Latest available filing year: 2021 · Primary form: IRS Form 990-N

  7. Society for Preservation & Encourmt of Barbershop Quartet Singing Amer

    EIN 066069288 · Headquarters: Madison, CT, US · Arts, Culture & Humanities · Latest available filing year: 2014 · Primary form: IRS Form 990-N

  8. Society for Preservation & Encourmt of Barbershop Quartet Singing Amer

    EIN 066074005 · Headquarters: Simsbury, CT, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  9. Society for Preservation & Encourmt of Barbershop Quartet Singing Amer

    EIN 066082918 · Headquarters: Wallingford, CT, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  10. Society for Preservation & Encourmt of Barbershop Quartet Singing Amer

    EIN 066082921 · Headquarters: Ledyard, CT, US · Unknown & Unclassified · Latest available filing year: 2020 · Primary form: IRS Form 990-N

  11. Society for Preservation & Encourmt of Barbershop Quartet Singing Amer

    EIN 066082922 · Headquarters: NAUGATUCK, CT, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  12. Society for Preservation & Encourmt of Barbershop Quartet Singing Amer

    EIN 222736055 · Headquarters: Enfield, CT, US · Arts, Culture & Humanities · Latest available filing year: 2019 · Primary form: IRS Form 990-N

  13. Society for Preservation & Encourmt of Barbershop Quartet Singing Amer

    EIN 237010718 · Headquarters: WATERBURY, CT, US · Arts, Culture & Humanities · Latest available filing year: 2007 · Primary form: IRS Form 990-N

  14. Society for Preservation & Encrgmnt of Barbershop Quartet Singing Amer

    EIN 066074899 · Headquarters: Manchester, CT, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  15. Society for Preservation & Encrgmnt of Barbershop Quartet Singing Amer

    EIN 066100159 · Headquarters: Newtown, CT, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  16. Society for Reformation Research

    EIN 430888540 · Headquarters: CHESHIRE, CT, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  17. Society for Technical Communication

    EIN 310968780 · Headquarters: Bethany, CT, US · Arts, Culture & Humanities · Latest available filing year: 2009 · Primary form: IRS Form 990-N

  18. Society for the Archeological Study of the Mary Rose Inc

    EIN 061043551 · Headquarters: Greenwich, CT, US · Environment · Latest available filing year: 2012 · Primary form: IRS Form 990-N

  19. Society for the Increase of the Ministry

    EIN 066053077 · Headquarters: HARTFORD, CT, USA · Education · Latest available filing year: 2024 · Primary form: IRS Form 990

  20. Society for the Preservation and Encouragement of Barbershop Quart

    EIN 060851877 · Headquarters: Stratford, CT, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  21. Society for the Preservation of Historic Cements Inc

    EIN 205448341 · Headquarters: Plainville, CT, US · Arts, Culture & Humanities · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  22. Society of American Magicians Magic Endowment Fund Inc

    EIN 222761202 · Headquarters: TOLLAND, CT, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  23. Society of American Magicians Parent Assembly No 1 Inc

    EIN 136144414 · Headquarters: MIDDLETOWN, CT, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  24. Society of Connecticut Sculptors

    EIN 061343836 · Headquarters: Litchfield, CT, US · Arts, Culture & Humanities · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  25. Society of Cosmetic Chemists Ct Chapter

    EIN 061136038 · Headquarters: ANSONIA, CT, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  26. Society of Creative Arts Newtown

    EIN 060978466 · Headquarters: NEWTOWN, CT, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  27. Society of Critical Care Medicine

    EIN 043282722 · Headquarters: Hartford, CT, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  28. Society of Financial Service Professionals Connecticut Chapter

    EIN 066082276 · Headquarters: ROCKY HILL, CT, USA · Unknown & Unclassified · Latest available filing year: 2023 · Primary form: IRS Form 990-EZ

  29. Society of Fire Protection Engineers

    EIN 060976665 · Headquarters: Hartford, CT, US · Public Safety, Disaster Preparedness & Relief · Latest available filing year: 2008 · Primary form: IRS Form 990-N

  30. Society of Human Engagement and Business Alignmen

    EIN 992825064 · Headquarters: Hartford, CT, USA · Community Improvement & Capacity Building · Latest available filing year: 2025 · Primary form: IRS Form 990-EZ

  31. Society of Human Engagement and Business CENTER

    EIN 880722736 · Headquarters: East Hartford, CT, USA · Education · Latest available filing year: 2024 · Primary form: IRS Form 990

  32. Society of Human Resource Management Inc

    EIN 912138360 · Headquarters: DARIEN, CT, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  33. Society of Latin-american Firefighters Inc

    EIN 311716919 · Headquarters: Manchester, CT, US · Public Safety, Disaster Preparedness & Relief · Latest available filing year: 2007 · Primary form: IRS Form 990-N

  34. Society of Manufacturing Engineers

    EIN 066084965 · Headquarters: Barkhamsted, CT, US · Unknown & Unclassified · Latest available filing year: 2018 · Primary form: IRS Form 990-N

  35. Society of Manufacturing Engineers

    EIN 066084966 · Headquarters: Waterbury, CT, US · Unknown & Unclassified · Latest available filing year: 2023 · Primary form: IRS Form 990-N

  36. Society of Manufacturing Engineers

    EIN 237150165 · Headquarters: Wallingford, CT, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  37. Society of Manufacturing Engineers

    EIN 311235589 · Headquarters: Norwalk, CT, US · Science & Technology · Latest available filing year: 2013 · Primary form: IRS Form 990-N

  38. Society of Mayflower Descendants in Connecticut

    EIN 066041007 · Headquarters: MIDDLETOWN, CT, USA · Arts, Culture & Humanities · Latest available filing year: 2024 · Primary form: IRS Form 990

  39. Society of Middletown First Settlers Descendants

    EIN 271282259 · Headquarters: Middletown, CT, US · Arts, Culture & Humanities · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  40. Society of Nepalese in America Inc

    EIN 454753056 · Headquarters: BRANFORD, CT, USA · Education · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  41. Society of Orpheus & Bacchus

    EIN 061003238 · Headquarters: New Haven, CT, US · Unknown & Unclassified · Latest available filing year: 2022 · Primary form: IRS Form 990-N

  42. Society of Our Lady of Grace Inc

    EIN 061087760 · Headquarters: HARTFORD, CT, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  43. Society of Physician Assistants in Rheumatology

    EIN 542108972 · Headquarters: Waterbury, CT, US · Diseases, Disorders & Medical Disciplines · Latest available filing year: 2009 · Primary form: IRS Form 990-N

  44. Society of Plactic Engineers

    EIN 823181937 · Headquarters: Danbury, CT, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  45. Society of Plastics Engineers

    EIN 042753844 · Headquarters: DANBURY, CT, US · Science & Technology · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  46. Society of Plastics Engineers

    EIN 061058469 · Headquarters: Bethel, CT, US · Science & Technology · Latest available filing year: 2017 · Primary form: IRS Form 990-N

  47. Society of Plastics Engineers

    EIN 066068798 · Headquarters: Hamden, CT, US · Unknown & Unclassified · Latest available filing year: 2022 · Primary form: IRS Form 990-N

  48. Society of Plastics Engineers

    EIN 116037586 · Headquarters: DANBURY, CT, US · Science & Technology · Latest available filing year: 2020 · Primary form: IRS Form 990-N

  49. Society of Plastics Engineers

    EIN 133186178 · Headquarters: BETHEL, CT, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  50. Society of Plastics Engineers

    EIN 223049887 · Headquarters: Danbury, CT, US · Unknown & Unclassified · Latest available filing year: 2021 · Primary form: IRS Form 990-N

  51. Society of Plastics Engineers

    EIN 237241745 · Headquarters: Bethel, CT, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  52. Society of Plastics Engineers

    EIN 237243921 · Headquarters: Bethel, CT, US · Science & Technology · Latest available filing year: 2016 · Primary form: IRS Form 990-N

  53. Society of Plastics Engineers

    EIN 316050249 · Headquarters: DANBURY, CT, US · Unknown & Unclassified · Latest available filing year: 2020 · Primary form: IRS Form 990-N

  54. Society of Plastics Engineers

    EIN 436050463 · Headquarters: DANBURY, CT, US · Science & Technology · Latest available filing year: 2020 · Primary form: IRS Form 990-N

  55. Society of Plastics Engineers

    EIN 510195173 · Headquarters: TRUMBULL, CT, US · Unknown & Unclassified · Latest available filing year: 2023 · Primary form: IRS Form 990-N

  56. Society of Plastics Engineers

    EIN 586067086 · Headquarters: Danbury, CT, US · Science & Technology · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  57. Society of Plastics Engineers

    EIN 621431770 · Headquarters: Danbury, CT, US · Unknown & Unclassified · Latest available filing year: 2022 · Primary form: IRS Form 990-N

  58. Society of Plastics Engineers

    EIN 621500898 · Headquarters: DANBURY, CT, US · Unknown & Unclassified · Latest available filing year: 2020 · Primary form: IRS Form 990-N

  59. Society of Plastics Engineers

    EIN 742686513 · Headquarters: DANBURY, CT, US · Unknown & Unclassified · Latest available filing year: 2020 · Primary form: IRS Form 990-N

  60. Society of Plastics Engineers

    EIN 846036743 · Headquarters: Brookfield, CT, US · Science & Technology · Latest available filing year: 2008 · Primary form: IRS Form 990-N

  61. Society of Plastics Engineers

    EIN 956096029 · Headquarters: DANBURY, CT, US · Science & Technology · Latest available filing year: 2020 · Primary form: IRS Form 990-N

  62. Society of Plastics Engineers 15 Western New England Section

    EIN 510195187 · Headquarters: Vernon, CT, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  63. Society of Plastics Engineers Inc

    EIN 060692002 · Headquarters: DANBURY, CT, USA · Science & Technology · Latest available filing year: 2024 · Primary form: IRS Form 990

  64. Society of Plastics Engineers Inc

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

  65. Society of Professional Assessors Inc

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

  66. Society of Saint Vincent De Paul St Mary Star of the Sea Conference

    EIN 471029947 · Headquarters: New London, CT, US · Human Services · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  67. Society of St Hugh of Cluny Inc

    EIN 261180674 · Headquarters: Greenwich, CT, US · Religion Related · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  68. Society of St Vincent De Paul

    EIN 611673545 · Headquarters: Niantic, CT, US · Human Services · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  69. Society of St Vincent De Paul St Bartholomew Conference

    EIN 264108713 · Headquarters: MANCHESTER, CT, US · Religion Related · Latest available filing year: 2018 · Primary form: IRS Form 990-N

  70. Society of St Vincent Paul St Berna Rd Conference

    EIN 412650684 · Headquarters: Enfield, CT, US · Human Services · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  71. Society of the Army of the Tennessee

    EIN 464782556 · Headquarters: Avon, CT, US · Community Improvement & Capacity Building · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  72. Society of the Cincinnati in the State of Connecticut

    EIN 066047355 · Headquarters: GREENWICH, CT, USA · Arts, Culture & Humanities · Latest available filing year: 2023 · Primary form: IRS Form 990

  73. 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

  74. 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

  75. Society of the War of 1812 in the State of Connecticut

    EIN 452511177 · Headquarters: Avon, CT, US · Arts, Culture & Humanities · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  76. 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

  77. Society of Women Engineers

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

  78. Society of Women Engineers

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

  79. Society of Women Engineers

    EIN 812901281 · Headquarters: New Haven, CT, US · Community Improvement & Capacity Building · Latest available filing year: 2023 · Primary form: IRS Form 990-N

  80. Society of Women Environmental Professionals

    EIN 550829998 · Headquarters: Southbury, CT, US · Environment · Latest available filing year: 2007 · Primary form: IRS Form 990-N

  81. 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

  82. Sociologists for Women in Society

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

  83. Soderstrom Scholars Fund Inc

    EIN 882809697 · Headquarters: GREENWICH, CT, USA · Education · Latest available filing year: 2025 · Primary form: IRS Form 990-EZ

  84. Soebrown Scholarship Foundation Incorporated

    EIN 883930379 · Headquarters: Windsor, CT, US · Education · Latest available filing year: 2022 · Primary form: IRS Form 990-N

  85. Soft Focus Foundation

    EIN 412965394 · Headquarters: Westport, CT, US · Arts, Culture & Humanities · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  86. Soft Landing Inc

    EIN 812259138 · Headquarters: Norwich, CT, US · Crime & Legal Related · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  87. Softball U Inc

    EIN 923001738 · Headquarters: MILFORD, CT, USA · Recreation & Sports · Latest available filing year: 2025 · Primary form: IRS Form 990-EZ

  88. Sojourner Ministries

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

  89. 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

  90. Solar Lodge No 131

    EIN 237144284 · Headquarters: Chester, CT, US · Mutual & Membership Benefit · Latest available filing year: 2023 · Primary form: IRS Form 990-N

  91. Solar Youth Inc

    EIN 061600471 · Headquarters: NEW HAVEN, CT, USA · Education · Latest available filing year: 2023 · Primary form: IRS Form 990

  92. Soldier Strong Access

    EIN 822575169 · Headquarters: STAMFORD, CT, USA · Community Improvement & Capacity Building · Latest available filing year: 2025 · Primary form: IRS Form 990

  93. Soldier Strong Inc

    EIN 462142225 · Headquarters: STAMFORD, CT, USA · Education · Latest available filing year: 2024 · Primary form: IRS Form 990

  94. Soldiers for the Truth Foundation

    EIN 311592564 · Headquarters: Greenwich, CT, USA · Education · Latest available filing year: 2024 · Primary form: IRS Form 990

  95. Solerico Foundation Inc

    EIN 825475193 · Headquarters: Westport, CT, US · Environment · Latest available filing year: 2020 · Primary form: IRS Form 990-N

  96. Solid Oak Big Band

    EIN 223258231 · Headquarters: NEWINGTON, CT, US · Arts, Culture & Humanities · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  97. Solidarity Sports Club Inc

    EIN 061368164 · Headquarters: HARTFORD, CT, US · Recreation & Sports · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  98. Solomon and Katie Wohl Foundation C/o Sally G Title

    EIN 066032085 · Headquarters: WEST HARTFORD, CT, USA · Philanthropy, Voluntarism & Grantmaking Foundations · Latest available filing year: 2017 · Primary form: IRS Form 990-PF

  99. Solomon Schechter Academy of New London County

    EIN 060904868 · Headquarters: Norwich, CT, US · Education · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  100. Solomon Schechter Day School of Greater Hartford Inc

    EIN 060873657 · Headquarters: WEST HARTFORD, CT, USA · Education · Latest available filing year: 2024 · Primary form: IRS Form 990

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