Data / Nonprofits / Connecticut / Cos Cob
Nonprofits in Cos Cob, CT: 76 registered with the IRS
76 nonprofits are registered with the IRS in Cos Cob, CT, 65 of them 501(c)(3) charities; the 26 that report revenue took in $35 million. The largest by revenue: Greenwich Water Club Inc ($10 million), Kids in Crisis Inc ($7.7 million), New Canaan Winter Club Inc ($4.4 million). Most common causes: arts, culture and humanities (10), human services (8), education (8).
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Every organization, largest by revenue first
| Organization | Category | Type | Since | Revenue | Assets | Filing |
|---|---|---|---|---|---|---|
| Greenwich Water Club Inc | Recreation and sports | 501(c)(7) | 2007 | $10 million | $2,550 | 2025-12 |
| Kids in Crisis Inc | 501(c)(3) | 1981 | $7.7 million | $14.5 million | 2025-06 | |
| New Canaan Winter Club Inc | 501(c)(7) | 1959 | $4.4 million | $5.6 million | 2025-07 | |
| Greenwich Historical Society Inc | Arts, culture and humanities | 501(c)(3) | 1957 | $3.7 million | $25 million | 2025-06 |
| Global Peht Corp | International, foreign affairs and national security | 501(c)(3) | 2016 | $2 million | $1.6 million | 2025-06 |
| Greenwich Adult Day Care Inc | Human services | 501(c)(3) | 1983 | $1.9 million | $3 million | 2025-06 |
| Bridges School Early Childhoodprogram Inc | Education | 501(c)(3) | 2007 | $1.8 million | $1.8 million | 2025-08 |
| Historic Properties of Greenwich Inc | Human services | 501(c)(3) | 2022 | $908,416 | $826,965 | 2024-12 |
| Greenwich Botanical Center Inc | Environment | 501(c)(3) | 1957 | $820,650 | $886,344 | 2025-06 |
| Cos Cob Revolver & Rifle Club Incorporated | 501(c)(7) | 1965 | $268,898 | $1.2 million | 2024-12 | |
| Greenwich Adult Day Care Trust Fund | Human services | 501(c)(3) | 1988 | $242,112 | $2.1 million | 2025-12 |
| Friends of Greenwich Crew Inc | Education | 501(c)(3) | 2008 | $190,225 | $238,283 | 2025-06 |
| Ptsa Connecticut Congress | 501(c)(3) | 1955 | $175,003 | $192,392 | 2025-06 | |
| Childrens Center of Cos Cob Inc | Human services | 501(c)(3) | 1996 | $149,972 | $90,953 | 2025-06 |
| The Mianus River Boat & Yacht Club Inc | 501(c)(7) | 1995 | $125,207 | $663,856 | 2024-12 | |
| Undies Project Inc | 501(c)(3) | 2016 | $120,664 | $71,375 | 2025-06 | |
| Greenwich Community Projects Fund Inc | 501(c)(3) | 1992 | $99,697 | $177,807 | 2025-12 | |
| Hopper Belmont Foundation Inc | Science and technology | 501(c)(3) | 2020 | $96,333 | $382,323 | 2025-12 |
| Diamond Hill Community Service Corporation | Housing and shelter | 501(c)(3) | 1987 | $61,558 | $16,213 | 2026-06 |
| Cos Cob Volunteer Fire Company No 1 Incorporated | Public safety, disaster preparedness and relief | 501(c)(3) | 2010 | $50,398 | $168,472 | 2024-12 |
| The Greenwich Rotary Foundation | 501(c)(3) | 1966 | $40,150 | $622,366 | 2026-06 | |
| Filipino Amateur League in Connecticut Inc | Arts, culture and humanities | 501(c)(3) | 2012 | $32,457 | $43,088 | 2025-08 |
| Cos Cob Volunteer Services Foundation Inc | Public safety, disaster preparedness and relief | 501(c)(3) | 1989 | $23,742 | $1.3 million | 2024-09 |
| Old Stone Bridge Property Owners Association | 501(c)(4) | 1981 | $21,460 | $213 | 2026-02 | |
| The Cos Cob Fire Police Patrol Incorporated | Public safety, disaster preparedness and relief | 501(c)(3) | 2013 | $18,626 | $118,939 | 2025-10 |
| Chris Rurak Foundation Inc | Recreation and sports | 501(c)(3) | 2021 | $5,000 | $55,859 | 2025-12 |
| Aj Dimasi Foundation Inc | Community improvement and capacity building | 501(c)(3) | 2024 | $0 | $0 | 2025-12 |
| Animal Rights Alliance Inc | 501(c)(3) | 1988 | $0 | $0 | 2026-03 | |
| Astronomical Society of Greenwich | Science and technology | 501(c)(3) | 2015 | $0 | $0 | 2026-06 |
| Beta-Spectrin 1 SPTBN1 Foundation Inc | Medical research | 501(c)(3) | 2023 | $0 | $0 | 2025-12 |
| Boyd Family Foundation | Philanthropy, voluntarism and grantmaking foundations | 501(c)(3) | 2006 | $175,211 | 2025-12 | |
| Burleson Institute Inc | Environment | 501(c)(3) | 2014 | $0 | $0 | 2025-12 |
| Cardinal Players Club Inc | Education | 501(c)(3) | 2019 | $0 | $0 | 2025-06 |
| Cardinals Girls Lacrosse Booster Club Inc | Recreation and sports | 501(c)(3) | 2022 | $0 | $0 | 2025-12 |
| Cardinals Lacrosse Club Inc | Recreation and sports | 501(c)(3) | 2022 | $0 | $0 | 2024-12 |
| Ceramic Youth Project | Education | 501(c)(3) | 2024 | |||
| Coalition To Modify Nota Inc | Health care | 501(c)(3) | 2023 | $0 | $0 | 2025-12 |
| Consortium of Eastern Regional Theatres Inc | Community improvement and capacity building | 501(c)(6) | 2019 | $0 | $0 | 2025-06 |
| Cos Cob Crushers Inc | Recreation and sports | 501(c)(3) | 2019 | $0 | $0 | 2025-12 |
| Cos Cos Athletic Club | Recreation and sports | 501(c)(3) | 2025 | |||
| David and Marguerite Reisfeld Foundation Inc | 501(c)(3) | 1979 | $38,766 | 2025-12 | ||
| Emily Catherine Fedorko Foundation | Education | 501(c)(3) | 2014 | $0 | $0 | 2025-12 |
| GHS Chorus Boosters Inc | Arts, culture and humanities | 501(c)(3) | 2025 | $0 | $0 | 2025-12 |
| GHS Science Research Booster | Education | 501(c)(3) | 2026 | $0 | $0 | 2026-06 |
| GW Foundation Trust | Philanthropy, voluntarism and grantmaking foundations | 501(c)(3) | 1999 | $27.2 million | 2025-12 | |
| Greenwich Community Foundation | Arts, culture and humanities | 501(c)(3) | 2024 | $0 | $0 | 2025-12 |
| Greenwich Girls Basketball Booster Club Inc | Recreation and sports | 501(c)(3) | 2026 | |||
| Greenwich High School Sports Foundation Inc | Education | 501(c)(3) | 2003 | $0 | $0 | 2025-12 |
| Greenwich Horseneck Club Inc | 501(c)(7) | 1993 | $0 | $0 | 2025-12 | |
| Greenwich Property Owners Association Inc | Community improvement and capacity building | 501(c)(4) | 2015 | $0 | $0 | 2025-12 |
| Greenwich Reform Synagogue Inc | 501(c)(3) | 1979 | ||||
| Greenwitch Opera Inc | Arts, culture and humanities | 501(c)(3) | 2024 | $0 | $0 | 2025-11 |
| Harness All Possibilities Inc | Human services | 501(c)(3) | 2017 | $0 | $0 | 2025-12 |
| Hats4healing Corp | Human services | 501(c)(3) | 2022 | $0 | $0 | 2023-12 |
| Heart of Mary School Inc | Education | 501(c)(3) | 2003 | $0 | $0 | 2025-12 |
| James and Chantal Sheridan Foundation | Philanthropy, voluntarism and grantmaking foundations | 501(c)(3) | 1997 | $9.1 million | 2024-12 | |
| James and Melissa Oshaughnessy Family Foundation | Human services | 501(c)(3) | 2022 | $52,411 | 2025-12 | |
| Kids for Casa Buna Inc | Youth development | 501(c)(3) | 2024 | $0 | $0 | 2025-12 |
| Leah & Sophia Future Foundation | Philanthropy, voluntarism and grantmaking foundations | 501(c)(3) | 2022 | $1.4 million | 2025-12 | |
| Mangold Music Foundation | Arts, culture and humanities | 501(c)(3) | 2012 | $0 | $0 | 2025-12 |
| Ministerios Nuevo Amanecer Inc | Religion-related | 501(c)(3) | 2026 | |||
| Morrys Big Idea Inc | Arts, culture and humanities | 501(c)(3) | 2025 | $0 | $0 | 2025-12 |
| Nalewajek Family Foundation Inc | Philanthropy, voluntarism and grantmaking foundations | 501(c)(3) | 1998 | $16,642 | 2025-12 | |
| Rekhta Americas Inc | Arts, culture and humanities | 501(c)(3) | 2019 | $53,403 | 2024-12 | |
| Robert and Nancy Family Foundation Inc | Arts, culture and humanities | 501(c)(3) | 2025 | $2.6 million | 2024-12 | |
| Scplayers | Arts, culture and humanities | 501(c)(3) | 2026 | |||
| The College Voter Inc | Public and societal benefit | 501(c)(3) | 2020 | $0 | $0 | 2025-12 |
| The Grossman Family Foundation | Philanthropy, voluntarism and grantmaking foundations | 501(c)(3) | 2010 | $142.5 million | 2024-12 | |
| The Vervane Foundation Inc | 501(c)(3) | 1993 | $7.9 million | 2024-12 | ||
| The@ocean View Foundation Inc | Environment | 501(c)(3) | 1999 | $4 million | 2026-01 | |
| Trinity Church | Religion-related | 501(c)(3) | 2000 | |||
| Utility Workers Union of America Afl-Cio | 501(c)(5) | 1944 | $0 | $0 | 2025-12 | |
| Van Nest Recreation Center Inc | 501(c)(7) | 1938 | $0 | $0 | 2025-12 | |
| Veterans of Foreign Wars of the United States Dept of Connecticut | 501(c)(19) | 1972 | $0 | $0 | 2025-12 | |
| Write Start Inc | Human services | 501(c)(3) | 2025 | |||
| Zet Foundation | Philanthropy, voluntarism and grantmaking foundations | 501(c)(3) | 2007 | $204,289 | 2024-12 |
By cause in Cos Cob, CT
- Arts, culture and humanities 10
- Human services 8
- Education 8
- Philanthropy, voluntarism and grantmaking foundations 7
- Recreation and sports 7
- Public safety, disaster preparedness and relief 3
- Environment 3
- Community improvement and capacity building 3
Nonprofits in every city of the state
Read from the IRS Exempt Organizations Business Master File, updated by the IRS on October 24, 2026 and rebuilt here every morning. Revenue and assets are from each organization's latest filing as the IRS lists it; the IRS record is the official one. Organizations only: no people are named on these pages.