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. Orthopedic Solutions to Surgical Access Inc

    EIN 812421831 · Headquarters: MANCHESTER, CT, USA · Diseases, Disorders & Medical Disciplines · Latest available filing year: 2025 · Primary form: IRS Form 990

  2. Ortiz Boxing Inc

    EIN 463761687 · Headquarters: Bridgeport, CT, US · Recreation & Sports · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  3. Osborn Family Foundation

    EIN 207321621 · Headquarters: NEW CANAAN, CT, USA · Philanthropy, Voluntarism & Grantmaking Foundations · Latest available filing year: 2012 · Primary form: IRS Form 990-PF

  4. Osborn Hill Kids Place Inc

    EIN 061522712 · Headquarters: FAIRFIELD, CT, US · Human Services · Latest available filing year: 2022 · Primary form: IRS Form 990-N

  5. Osborn Hill School Pta

    EIN 060994087 · Headquarters: FAIRFIELD, CT, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  6. Oscar Frederick Peyser Foundation Inc

    EIN 136065515 · Headquarters: HARTFORD, CT, USA · Unknown & Unclassified · Latest available filing year: 2023 · Primary form: IRS Form 990-PF

  7. Oscar H Cowan American Legion Post 3 Inc

    EIN 061478619 · Headquarters: STAMFORD, CT, US · Public & Societal Benefit · Latest available filing year: 2016 · Primary form: IRS Form 990-N

  8. Oscar H Cpowan Post 3 American Legion Building Assoc Inc

    EIN 061135168 · Headquarters: STAMFORD, CT, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  9. Oseas Conservation Foundation Inc

    EIN 465546130 · Headquarters: RIDGEFIELD, CT, USA · Environment · Latest available filing year: 2025 · Primary form: IRS Form 990

  10. Osenti Legacy Centre Inc

    EIN 852020421 · Headquarters: Manchester, CT, USA · Religion Related · Latest available filing year: 2025 · Primary form: IRS Form 990-EZ

  11. Oset Inc

    EIN 473488865 · Headquarters: STAMFORD, CT, USA · Health Care · Latest available filing year: 2024 · Primary form: IRS Form 990

  12. Oshana Elementary Pto

    EIN 872666859 · Headquarters: Plantsville, CT, US · Education · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  13. Osm Foundation Inc

    EIN 812380339 · Headquarters: TRUMBULL, CT, USA · Education · Latest available filing year: 2020 · Primary form: IRS Form 990-EZ

  14. Ossen Family Foundation

    EIN 261243178 · Headquarters: WEST HARTFORD, CT, USA · Philanthropy, Voluntarism & Grantmaking Foundations · Latest available filing year: 2025 · Primary form: IRS Form 990-PF

  15. Osterman Community Foundation

    EIN 202246985 · Headquarters: CHESHIRE, CT, USA · Philanthropy, Voluntarism & Grantmaking Foundations · Latest available filing year: 2025 · Primary form: IRS Form 990

  16. Ostomy Awareness Foundation

    EIN 853145343 · Headquarters: New Milford, CT, US · Diseases, Disorders & Medical Disciplines · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  17. Oswegatchie Hills Club Inc

    EIN 060865114 · Headquarters: Niantic, CT, US · Recreation & Sports · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  18. Oswegatchie School Organization

    EIN 061055804 · Headquarters: Waterford, CT, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  19. Oswegatchie Volunteer Fire Service Benefit Association

    EIN 061480952 · Headquarters: WATERFORD, CT, USA · Public Safety, Disaster Preparedness & Relief · Latest available filing year: 2024 · Primary form: IRS Form 990-PF

  20. Otfinoski Family Foundation

    EIN 261511601 · Headquarters: OLD LYME, CT, USA · Philanthropy, Voluntarism & Grantmaking Foundations · Latest available filing year: 2023 · Primary form: IRS Form 990-PF

  21. Otherworld Interactive Theater Inc

    EIN 223205646 · Headquarters: Cheshire, CT, USA · Arts, Culture & Humanities · Latest available filing year: 2025 · Primary form: IRS Form 990-EZ

  22. Otis Library

    EIN 060669124 · Headquarters: NORWICH, CT, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  23. Ottava for All Inc

    EIN 872418285 · Headquarters: MERIDEN, CT, USA · Health Care · Latest available filing year: 2024 · Primary form: IRS Form 990

  24. Otter Cove Association Inc

    EIN 066079283 · Headquarters: Old Saybrook, CT, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  25. Our Children's Center

    EIN 061223504 · Headquarters: WEST HARTFORD, CT, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990

  26. Our Commuity Cares Inc

    EIN 364755921 · Headquarters: Clinton, CT, US · Community Improvement & Capacity Building · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  27. Our Community Heros Inc

    EIN 873664174 · Headquarters: GUILFORD, CT, USA · Community Improvement & Capacity Building · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  28. Our Community Matters Inc

    EIN 861883197 · Headquarters: NEW HAVEN, CT, USA · Health Care · Latest available filing year: 2022 · Primary form: IRS Form 990

  29. Our Companions Domestic Animal Sanctuary Inc

    EIN 412047734 · Headquarters: Manchester, CT, USA · Animal Related · Latest available filing year: 2024 · Primary form: IRS Form 990

  30. Our Cure 4 Life

    EIN 472455610 · Headquarters: COLUMBIA, CT, US · Unknown & Unclassified · Latest available filing year: 2014 · Primary form: IRS Form 990-N

  31. Our Happy Place Inc

    EIN 853769232 · Headquarters: BURLINGTON, CT, US · Mental Health & Crisis Intervention · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  32. Our Heritage Inc

    EIN 202687336 · Headquarters: Westport, CT, US · Religion Related · Latest available filing year: 2008 · Primary form: IRS Form 990-N

  33. Our Heroes Fund-Connecticut Swat Challenge

    EIN 473977432 · Headquarters: West Hartford, CT, USA · Crime & Legal Related · Latest available filing year: 2024 · Primary form: IRS Form 990

  34. Our House Meriden Inc

    EIN 832248999 · Headquarters: Meriden, CT, US · Community Improvement & Capacity Building · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  35. Our Humanity Matters Inc

    EIN 461267305 · Headquarters: NEW PRESTON, CT, USA · Human Services · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  36. Our Kids 4 Kids Vision

    EIN 883613719 · Headquarters: Hamden, CT, US · Youth Development · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  37. Our Lady of Good Counsel Charitable Foundation Tr

    EIN 066484893 · Headquarters: WETHERSFIELD, CT, USA · Philanthropy, Voluntarism & Grantmaking Foundations · Latest available filing year: 2023 · Primary form: IRS Form 990-PF

  38. Our Lady of Guadalupe Home Foundation Inc

    EIN 030346498 · Headquarters: North Haven, CT, US · Human Services · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  39. Our Lady of Mercy Preparatory Academy

    EIN 831029360 · Headquarters: Madison, CT, US · Education · Latest available filing year: 2024 · Primary form: IRS Form 990

  40. Our Ladys Pilgrimage Inc

    EIN 462354962 · Headquarters: New Canaan, CT, USA · Religion Related · Latest available filing year: 2025 · Primary form: IRS Form 990

  41. Our Little Guild Association Inc

    EIN 932087538 · Headquarters: North Grosvenordale, CT, US · Arts, Culture & Humanities · Latest available filing year: 2022 · Primary form: IRS Form 990-N

  42. Our New Village

    EIN 922857003 · Headquarters: Hartford, CT, US · Food, Agriculture & Nutrition · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  43. Our Piece of the Pie Inc

    EIN 060939659 · Headquarters: HARTFORD, CT, USA · Human Services · Latest available filing year: 2024 · Primary form: IRS Form 990

  44. Our Saviors Cemetery Inc

    EIN 451861428 · Headquarters: Granby, CT, US · Mutual & Membership Benefit · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  45. Our Shoreline Community Association Inc

    EIN 270862627 · Headquarters: West Mystic, CT, US · Human Services · Latest available filing year: 2020 · Primary form: IRS Form 990-N

  46. Our Tolland Inc

    EIN 474960895 · Headquarters: Tolland, CT, US · Public & Societal Benefit · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  47. Our Vision Inc

    EIN 061019196 · Headquarters: Westport, CT, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  48. Ousatonic Fish & Game Protective Association Inc

    EIN 061056971 · Headquarters: New Milford, CT, US · Unknown & Unclassified · Latest available filing year: 2023 · Primary form: IRS Form 990-N

  49. Out Film CT Inc

    EIN 222990670 · Headquarters: Hartford, CT, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-EZ

  50. Out of the Crate Inc

    EIN 811362506 · Headquarters: RIDGEFIELD, CT, US · Unknown & Unclassified · Latest available filing year: 2022 · Primary form: IRS Form 990-N

  51. Out of the Trunk Ministry

    EIN 833403110 · Headquarters: New Haven, CT, US · Human Services · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  52. Out to Lunch Bunch

    EIN 833353926 · Headquarters: Danbury, CT, US · Health Care · Latest available filing year: 2021 · Primary form: IRS Form 990-N

  53. Out to Pasture Farm and Rescue Inc

    EIN 061635636 · Headquarters: NEWINGTON, CT, USA · Animal Related · Latest available filing year: 2024 · Primary form: IRS Form 990

  54. Outbox Education Inc

    EIN 851161640 · Headquarters: GREENWICH, CT, US · Civil Rights, Social Action & Advocacy · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  55. Outct

    EIN 462852581 · Headquarters: NEW LONDON, CT, US · Human Services · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  56. Outdoor Advertising Association of Connecticut Inc

    EIN 061327510 · Headquarters: West Haven, CT, USA · Community Improvement & Capacity Building · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  57. Outdoor Stewards of Conservation Foundation Inc

    EIN 863710407 · Headquarters: MIDDLEBURY, CT, USA · Environment · Latest available filing year: 2024 · Primary form: IRS Form 990

  58. Outings4charity Inc

    EIN 272584664 · Headquarters: Vernon, CT, US · Philanthropy, Voluntarism & Grantmaking Foundations · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  59. Outreach Charities Inc

    EIN 333416688 · Headquarters: New Haven, CT, US · Human Services · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  60. Outreach Ct Veterans Inc

    EIN 822821929 · Headquarters: New Britain, CT, US · Public & Societal Benefit · Latest available filing year: 2017 · Primary form: IRS Form 990-N

  61. Outreachinc

    EIN 061211144 · Headquarters: NEWINGTON, CT, USA · Human Services · Latest available filing year: 2024 · Primary form: IRS Form 990

  62. Outrider Dogs Rescue Inc

    EIN 921248406 · Headquarters: SIMSBURY, CT, USA · Animal Related · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  63. Outrun 38 Inc

    EIN 471106304 · Headquarters: Westbrook, CT, US · Diseases, Disorders & Medical Disciplines · Latest available filing year: 2019 · Primary form: IRS Form 990-N

  64. Outrun Addiction Inc

    EIN 832239912 · Headquarters: Enfield, CT, US · Mental Health & Crisis Intervention · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  65. Outside Perspectives Inc

    EIN 473624137 · Headquarters: New Hartford, CT, USA · Education · Latest available filing year: 2023 · Primary form: IRS Form 990

  66. Over 50 Society Inc

    EIN 900150016 · Headquarters: Bridgeport, CT, US · Recreation & Sports · Latest available filing year: 2013 · Primary form: IRS Form 990-N

  67. Overcomer Training Center Inc

    EIN 853985342 · Headquarters: Middletown, CT, USA · Youth Development · Latest available filing year: 2025 · Primary form: IRS Form 990

  68. Overcomers of the World

    EIN 342007834 · Headquarters: Waterbury, CT, US · International, Foreign Affairs & National Security · Latest available filing year: 2008 · Primary form: IRS Form 990-N

  69. Overcoming Barriers Inc

    EIN 010909327 · Headquarters: BRANFORD, CT, USA · Mental Health & Crisis Intervention · Latest available filing year: 2025 · Primary form: IRS Form 990-EZ

  70. Overcoming Through Christ Inc

    EIN 842939222 · Headquarters: DANBURY, CT, US · Human Services · Latest available filing year: 2021 · Primary form: IRS Form 990-N

  71. Overeaters Anonymous Btvig Inc

    EIN 882497357 · Headquarters: MILFORD, CT, US · Mental Health & Crisis Intervention · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  72. Overlook Community Club Inc

    EIN 061313163 · Headquarters: Waterbury, CT, US · Civil Rights, Social Action & Advocacy · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  73. Overlook Development Corporation

    EIN 473222339 · Headquarters: HARTFORD, CT, US · Housing & Shelter · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  74. Overseas Save the Chinese Childrenfoundation Inc

    EIN 205955397 · Headquarters: BROOKFIELD, CT, USA · Human Services · Latest available filing year: 2025 · Primary form: IRS Form 990-EZ

  75. Owens Meadow Farm

    EIN 333352053 · Headquarters: CANTON, CT, US · Food, Agriculture & Nutrition · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  76. Owls Inc

    EIN 061079806 · Headquarters: Ridgefield, CT, US · Unknown & Unclassified · Latest available filing year: 2020 · Primary form: IRS Form 990-N

  77. Ownpace

    EIN 474342034 · Headquarters: AVON, CT, USA · Youth Development · Latest available filing year: 2015 · Primary form: IRS Form 990-PF

  78. Ox Ridge Charitable Foundation Inc

    EIN 824319855 · Headquarters: DARIEN, CT, USA · Philanthropy, Voluntarism & Grantmaking Foundations · Latest available filing year: 2024 · Primary form: IRS Form 990

  79. Ox Ridge Kennel Club Incorporated

    EIN 223109664 · Headquarters: Chester, CT, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  80. Ox Ridge Riding and Racquet Club Inc

    EIN 060482020 · Headquarters: DARIEN, CT, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  81. Oxford Academy Inc

    EIN 222809363 · Headquarters: WESTBROOK, CT, USA · Education · Latest available filing year: 2024 · Primary form: IRS Form 990

  82. Oxford Airknockers Flying Club Inc

    EIN 273168215 · Headquarters: Oxford, CT, US · Recreation & Sports · Latest available filing year: 2015 · Primary form: IRS Form 990-N

  83. Oxford Ambulance Association Inc

    EIN 066045769 · Headquarters: OXFORD, CT, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  84. Oxford Babe Ruth Inc

    EIN 061635710 · Headquarters: OXFORD, CT, USA · Human Services · Latest available filing year: 2023 · Primary form: IRS Form 990

  85. Oxford Center Volunteer Fire Compan

    EIN 061298869 · Headquarters: Oxford, CT, US · Public Safety, Disaster Preparedness & Relief · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  86. Oxford Consortium for Human Rights Inc

    EIN 852580394 · Headquarters: WINSTED, CT, USA · International, Foreign Affairs & National Security · Latest available filing year: 2024 · Primary form: IRS Form 990

  87. Oxford Flying Club Inc

    EIN 061337152 · Headquarters: OXFORD, CT, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  88. Oxford Friends for Charity Inc

    EIN 473401802 · Headquarters: Oxford, CT, US · Unknown & Unclassified · Latest available filing year: 2020 · Primary form: IRS Form 990-N

  89. Oxford High School Booster Club

    EIN 208995230 · Headquarters: OXFORD, CT, USA · Education · Latest available filing year: 2024 · Primary form: IRS Form 990

  90. Oxford Historical Society Inc

    EIN 342030150 · Headquarters: OXFORD, CT, US · Arts, Culture & Humanities · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  91. Oxford House of Connecticut Corporation

    EIN 823888786 · Headquarters: New Haven, CT, US · Housing & Shelter · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  92. Oxford Land Trust Inc

    EIN 066323106 · Headquarters: Oxford, CT, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  93. Oxford Lions Club Inc

    EIN 562580853 · Headquarters: Oxford, CT, US · Community Improvement & Capacity Building · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  94. Oxford Main Street Project Corporation

    EIN 830807750 · Headquarters: OXFORD, CT, US · Environment · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  95. Oxford Parent Teacher Organization Inc

    EIN 061064984 · Headquarters: OXFORD, CT, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  96. Oxford Quarterback Club Inc

    EIN 993325003 · Headquarters: Oxford, CT, USA · Education · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  97. Oxford Senior Citizens Inc

    EIN 061080963 · Headquarters: OXFORD, CT, US · Human Services · Latest available filing year: 2011 · Primary form: IRS Form 990-N

  98. Oxford Soccer League Inc

    EIN 061571702 · Headquarters: OXFORD, CT, USA · Recreation & Sports · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  99. Oxford Youth Football & Cheerleading Inc

    EIN 991023024 · Headquarters: OXFORD, CT, USA · Recreation & Sports · Latest available filing year: 2025 · Primary form: IRS Form 990-EZ

  100. Oyebog Tennis Academy

    EIN 582490083 · Headquarters: WESTPORT, CT, USA · International, Foreign Affairs & National Security · Latest available filing year: 2024 · Primary form: IRS Form 990

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