Nonprofits in Cos Cob, Connecticut

Nonprofits in Cos Cob, Connecticut. Browse 81 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. Aj Dimasi Foundation Inc

    EIN 991191027 · Headquarters: COS COB, CT, US · Community Improvement & Capacity Building · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  2. American Fencing Alliance Corp

    EIN 465439733 · Headquarters: Cos Cob, CT, US · Recreation & Sports · Latest available filing year: 2014 · Primary form: IRS Form 990-N

  3. Animal Rights Alliance Inc

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

  4. Astronomical Society of Greenwich

    EIN 453188575 · Headquarters: Cos Cob, CT, US · Science & Technology · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  5. Boyd Family Foundation

    EIN 203480314 · Headquarters: cos cob, CT, USA · Philanthropy, Voluntarism & Grantmaking Foundations · Latest available filing year: 2025 · Primary form: IRS Form 990-PF

  6. Bridges School Early Childhood Program Inc

    EIN 204863924 · Headquarters: COS COB, CT, USA · Education · Latest available filing year: 2024 · Primary form: IRS Form 990

  7. Burleson Institute Inc

    EIN 800940439 · Headquarters: Cos Cob, CT, US · Environment · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  8. Cardinal Players Club Inc

    EIN 834218094 · Headquarters: Cos Cob, CT, US · Education · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  9. Cardinals Girls Lacrosse Booster Club Inc

    EIN 823207119 · Headquarters: Cos Cob, CT, US · Recreation & Sports · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  10. Cardinals Lacrosse Club Inc

    EIN 475139771 · Headquarters: Cos Cob, CT, US · Recreation & Sports · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  11. Centesimus Annus Pro Pontifice Inc

    EIN 200265464 · Headquarters: Cos Cob, CT, US · Religion Related · Latest available filing year: 2007 · Primary form: IRS Form 990-N

  12. Children's Center of Cos Cob Inc

    EIN 061335265 · Headquarters: COS COB, CT, USA · Human Services · Latest available filing year: 2024 · Primary form: IRS Form 990

  13. Chris Rurak Foundations Inc

    EIN 863806956 · Headquarters: COS COB, CT, USA · Recreation & Sports · Latest available filing year: 2025 · Primary form: IRS Form 990-EZ

  14. Coalition to Modify Nota Inc

    EIN 931371867 · Headquarters: Cos Cob, CT, US · Health Care · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  15. Consortium of Eastern Regional Theatres Inc

    EIN 462777460 · Headquarters: Cos Cob, CT, US · Community Improvement & Capacity Building · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  16. Cos Cob Archers Inc

    EIN 061135292 · Headquarters: cos cob, CT, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  17. Cos Cob Crushers Inc

    EIN 463623533 · Headquarters: Cos Cob, CT, US · Recreation & Sports · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  18. Cos Cob Revolver & Rifle Club Inc

    EIN 066052196 · Headquarters: COS COB, CT, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  19. Cos Cob Volunteer Fire Co #1 Inc

    EIN 066064017 · Headquarters: Cos Cob, CT, USA · Public Safety, Disaster Preparedness & Relief · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  20. Cos Cob Volunteer Services Foundation Inc

    EIN 061214831 · Headquarters: Cos Cob, CT, USA · Public Safety, Disaster Preparedness & Relief · Latest available filing year: 2023 · Primary form: IRS Form 990

  21. Diamond Hill Communmity Service Cor P

    EIN 222597140 · Headquarters: COS COB, CT, USA · Housing & Shelter · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  22. Emily Catherine Fedorko Foundation

    EIN 471538908 · Headquarters: COS COB, CT, US · Education · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  23. Filipino Amateur League in Connecticut Inc

    EIN 270858439 · Headquarters: COS COB, CT, USA · Arts, Culture & Humanities · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  24. Friends of Greenwich Crew Inc

    EIN 800142507 · Headquarters: Cos Cob, CT, USA · Education · Latest available filing year: 2024 · Primary form: IRS Form 990

  25. Future of Newcomb College Inc

    EIN 204510120 · Headquarters: Cos Cob, CT, US · Education · Latest available filing year: 2012 · Primary form: IRS Form 990-N

  26. Ghs Chorus Boosters Inc

    EIN 393933419 · Headquarters: COS COB, CT, US · Arts, Culture & Humanities · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  27. Ghs Science Research Booster

    EIN 422055817 · Headquarters: Cos Cob, CT, US · Education · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  28. Global Peht Corp Partnership to End Human Trafficking

    EIN 812175815 · Headquarters: COS COB, CT, USA · International, Foreign Affairs & National Security · Latest available filing year: 2024 · Primary form: IRS Form 990

  29. Greenwich Adult Day Care Inc

    EIN 061066787 · Headquarters: COS COB, CT, USA · Human Services · Latest available filing year: 2024 · Primary form: IRS Form 990

  30. Greenwich Adult Day Care Trust Fund

    EIN 222894544 · Headquarters: COS COB, CT, USA · Human Services · Latest available filing year: 2025 · Primary form: IRS Form 990

  31. Greenwich Athletic Association

    EIN 222711260 · Headquarters: Cos Cob, CT, USA · Recreation & Sports · Latest available filing year: 2011 · Primary form: IRS Form 990-EZ

  32. Greenwich Botanical Center Inc

    EIN 066068606 · Headquarters: COS COB, CT, USA · Environment · Latest available filing year: 2024 · Primary form: IRS Form 990

  33. Greenwich Community Foundation

    EIN 994149462 · Headquarters: COS COB, CT, US · Arts, Culture & Humanities · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  34. Greenwich Community Projects Fund Inc

    EIN 223092506 · Headquarters: COS COB, CT, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990

  35. Greenwich High School Sports Foundation Inc

    EIN 300177313 · Headquarters: Cos Cob, CT, US · Education · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  36. Greenwich Historical Society Inc

    EIN 066036049 · Headquarters: COS COB, CT, USA · Arts, Culture & Humanities · Latest available filing year: 2024 · Primary form: IRS Form 990

  37. Greenwich Horseneck Club Inc

    EIN 061341763 · Headquarters: COS COB, CT, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  38. Greenwich Kids Triathlon

    EIN 421558596 · Headquarters: Cos Cob, CT, US · Recreation & Sports · Latest available filing year: 2008 · Primary form: IRS Form 990-N

  39. Greenwich Opera Inc

    EIN 994678247 · Headquarters: COS COB, CT, US · Arts, Culture & Humanities · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  40. Greenwich Property Owners Association Inc

    EIN 465667347 · Headquarters: Cos Cob, CT, US · Community Improvement & Capacity Building · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  41. Greenwich Safe Cycling

    EIN 061612323 · Headquarters: Cos Cob, CT, US · Recreation & Sports · Latest available filing year: 2012 · Primary form: IRS Form 990-N

  42. Hammers and Hearts Inc

    EIN 823808064 · Headquarters: Cos Cob, CT, US · Human Services · Latest available filing year: 2017 · Primary form: IRS Form 990-N

  43. Harness All Possibilities Inc

    EIN 814511699 · Headquarters: Cos Cob, CT, US · Human Services · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  44. Hats4healing Corp

    EIN 882933947 · Headquarters: Cos Cob, CT, US · Human Services · Latest available filing year: 2023 · Primary form: IRS Form 990-N

  45. Heart of Mary School Inc

    EIN 542082391 · Headquarters: COS COB, CT, US · Education · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  46. Historic Properties of Greenwich Inc

    EIN 825033533 · Headquarters: COS COB, CT, USA · Human Services · Latest available filing year: 2024 · Primary form: IRS Form 990

  47. Hopper-belmont Foundation

    EIN 843556580 · Headquarters: Cos Cob, CT, USA · Science & Technology · Latest available filing year: 2025 · Primary form: IRS Form 990-EZ

  48. James & Melissa O'shaughnessy Family Foundation

    EIN 872949314 · Headquarters: COS COB, CT, USA · Human Services · Latest available filing year: 2025 · Primary form: IRS Form 990-PF

  49. James and Chantal Sheridan Foundation

    EIN 133933347 · Headquarters: COS COB, CT, USA · Philanthropy, Voluntarism & Grantmaking Foundations · Latest available filing year: 2024 · Primary form: IRS Form 990-PF

  50. Jim Arden Foundation

    EIN 061636341 · Headquarters: COS COB, CT, US · Education · Latest available filing year: 2020 · Primary form: IRS Form 990-N

  51. Kids for Casa Buna Inc

    EIN 332277651 · Headquarters: Cos Cob, CT, US · Youth Development · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  52. Kids in Crisis Inc

    EIN 061027885 · Headquarters: COS COB, CT, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  53. Leah & Sophia Future Foundation

    EIN 883205825 · Headquarters: COS COB, CT, USA · Philanthropy, Voluntarism & Grantmaking Foundations · Latest available filing year: 2025 · Primary form: IRS Form 990-PF

  54. Mangold Music Foundation

    EIN 454483497 · Headquarters: Cos Cob, CT, US · Arts, Culture & Humanities · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  55. Morrys Big Idea Inc

    EIN 994000061 · Headquarters: Cos Cob, CT, US · Arts, Culture & Humanities · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  56. Mothering Center Inc

    EIN 060987819 · Headquarters: Cos Cob, CT, US · Human Services · Latest available filing year: 2007 · Primary form: IRS Form 990-N

  57. Nalewajek Family Foundation

    EIN 061501851 · Headquarters: COS COB, CT, USA · Philanthropy, Voluntarism & Grantmaking Foundations · Latest available filing year: 2024 · Primary form: IRS Form 990-PF

  58. Old Stone Bridge Property Owners' Association Inc

    EIN 061031492 · Headquarters: COS COB, CT, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990

  59. Pta Ct Congress Cos Cob School

    EIN 510202170 · Headquarters: COS COB, CT, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  60. Rekhta Americas Inc

    EIN 831083624 · Headquarters: COS COB, CT, USA · Arts, Culture & Humanities · Latest available filing year: 2024 · Primary form: IRS Form 990-PF

  61. Retired Mens Association of Greenwich Inc

    EIN 352410443 · Headquarters: Cos Cob, CT, USA · Recreation & Sports · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  62. Saint Valentine Epilepsy Foundation Corporation

    EIN 842725094 · Headquarters: COS COB, CT, US · Diseases, Disorders & Medical Disciplines · Latest available filing year: 2020 · Primary form: IRS Form 990-N

  63. The College Voter Inc

    EIN 851543671 · Headquarters: Cos Cob, CT, US · Public & Societal Benefit · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  64. The Cos Cob Fire Police Patrol Inc

    EIN 061211165 · Headquarters: COS COB, CT, USA · Public Safety, Disaster Preparedness & Relief · Latest available filing year: 2023 · Primary form: IRS Form 990-EZ

  65. The David & Marguerite Reisfeld Foundation Inc

    EIN 222192164 · Headquarters: COS COB, CT, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-PF

  66. The Gary C Wendt Foundation

    EIN 066469925 · Headquarters: COS COB, CT, USA · Philanthropy, Voluntarism & Grantmaking Foundations · Latest available filing year: 2025 · Primary form: IRS Form 990-PF

  67. The Greenwich Rotary Foundation

    EIN 066082823 · Headquarters: COS COB, CT, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  68. The Greenwich Water Club Inc

    EIN 201379604 · Headquarters: Cos Cob, CT, USA · Recreation & Sports · Latest available filing year: 2025 · Primary form: IRS Form 990

  69. The Grossman Family Foundation

    EIN 263919092 · Headquarters: COS COB, CT, USA · Philanthropy, Voluntarism & Grantmaking Foundations · Latest available filing year: 2024 · Primary form: IRS Form 990-PF

  70. The Mianus River Boat & Yacht Club Inc

    EIN 061284766 · Headquarters: Cos Cob, CT, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  71. The Ocean View Foundation Inc

    EIN 223636378 · Headquarters: COS COB, CT, USA · Environment · Latest available filing year: 2025 · Primary form: IRS Form 990-PF

  72. The Robert and Nancy Family Foundation Inc

    EIN 934805181 · Headquarters: COS COB, CT, USA · Arts, Culture & Humanities · Latest available filing year: 2024 · Primary form: IRS Form 990-PF

  73. The Vervane Foundation Inc

    EIN 223256829 · Headquarters: COS COB, CT, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-PF

  74. Undies Project Inc

    EIN 814243048 · Headquarters: COS COB, CT, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  75. Unload Foundation Inc

    EIN 824585594 · Headquarters: Cos Cob, CT, US · Arts, Culture & Humanities · Latest available filing year: 2023 · Primary form: IRS Form 990-N

  76. Utility Workers Union of America Afl-cio

    EIN 066046057 · Headquarters: Cos Cob, CT, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  77. Van Nest Recreation Center Inc

    EIN 131735504 · Headquarters: COS COB, CT, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  78. Vasudhaiva Kutumbakam Foundation

    EIN 822589010 · Headquarters: Cos Cob, CT, US · Human Services · Latest available filing year: 2023 · Primary form: IRS Form 990-N

  79. Veterans of Foreign Wars of the United States Dept of Connecticut

    EIN 237124442 · Headquarters: Cos Cob, CT, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  80. Volunteer Service Foundation Inc

    EIN 844589139 · Headquarters: Cos Cob, CT, US · Philanthropy, Voluntarism & Grantmaking Foundations · Latest available filing year: 2020 · Primary form: IRS Form 990-N

  81. Zet Foundation

    EIN 205819853 · Headquarters: COS COB, CT, USA · Philanthropy, Voluntarism & Grantmaking Foundations · Latest available filing year: 2024 · Primary form: IRS Form 990-PF