Data / Nonprofits / Connecticut / Stonington
Nonprofits in Stonington, CT: 77 registered with the IRS
77 nonprofits are registered with the IRS in Stonington, CT, 62 of them 501(c)(3) charities; the 30 that report revenue took in $43.8 million. The largest by revenue: Coast Guard Foundation Inc ($17.3 million), Pine Point School Inc ($5.4 million), Stonington Country Club Inc ($4.2 million). Most common causes: arts, culture and humanities (12), philanthropy, voluntarism and grantmaking foundations (9), recreation and sports (7).
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Every organization, largest by revenue first
| Organization | Category | Type | Since | Revenue | Assets | Filing |
|---|---|---|---|---|---|---|
| Coast Guard Foundation Inc | Public and societal benefit | 501(c)(3) | 1986 | $17.3 million | $29.7 million | 2025-12 |
| Pine Point School Inc | 501(c)(3) | 1949 | $5.4 million | $12.6 million | 2025-06 | |
| Stonington Country Club Inc | 501(c)(7) | 1991 | $4.2 million | $10.6 million | 2024-12 | |
| New England Science & Sailing Foundation Inc | Recreation and sports | 501(c)(3) | 2004 | $3.7 million | $5.5 million | 2025-12 |
| The Stonington Community Center Inc | Human services | 501(c)(3) | 1946 | $2.6 million | $5.1 million | 2025-12 |
| Stonington Harbor Yacht Club Inc | Recreation and sports | 501(c)(7) | 2002 | $1.2 million | $2 million | 2024-12 |
| Mystic Ballet Inc | Arts, culture and humanities | 501(c)(3) | 2000 | $1 million | $2.5 million | 2024-12 |
| Wadawanuck Club Inc | Recreation and sports | 501(c)(7) | 1950 | $1 million | $2.7 million | 2024-12 |
| Stonington Free Library Association | Education | 501(c)(3) | 1943 | $967,528 | $7.6 million | 2025-06 |
| Stonington Community Rowing Center | Recreation and sports | 501(c)(3) | 2021 | $747,944 | $1.7 million | 2024-12 |
| Fellowship House Ministries Inc | Human services | 501(c)(3) | 1991 | $738,697 | $1.1 million | 2026-06 |
| Stonington Historical Society | Arts, culture and humanities | 501(c)(3) | 1943 | $701,865 | $4.3 million | 2023-12 |
| James Merrill House Foundation | Arts, culture and humanities | 501(c)(3) | 2021 | $624,556 | $2.2 million | 2025-03 |
| Yellow Farmhouse Education Center | Arts, culture and humanities | 501(c)(3) | 2018 | $531,788 | $379,615 | 2024-12 |
| Groton Sportsmens Club Inc | 501(c)(7) | 1962 | $479,554 | $2.2 million | 2026-06 | |
| Capital Institute | Human services | 501(c)(3) | 2011 | $388,323 | $160,897 | 2024-12 |
| The Maurice C La Grua Center Inc | Philanthropy, voluntarism and grantmaking foundations | 501(c)(3) | 2007 | $360,619 | $883,899 | 2025-06 |
| Stonington Volunteer Ambulance Corp Inc | 501(c)(3) | 1978 | $359,263 | $769,309 | 2025-06 | |
| Portugese Holy Ghost Society Inc Portugueses Club | Religion-related | 501(c)(4) | 1943 | $283,181 | $513,328 | 2025-12 |
| Salt Marsh Opera Company | Arts, culture and humanities | 501(c)(3) | 2001 | $277,702 | $810,753 | 2024-12 |
| Stonington Cemetery Association Inc | 501(c)(13) | 1913 | $188,903 | $1.3 million | 2026-06 | |
| Inclusion A Sylvestre Foundation Inc | Human services | 501(c)(3) | 2019 | $147,279 | $356,528 | 2025-12 |
| Rotary Foundation of the Stoningtons Inc | Community improvement and capacity building | 501(c)(3) | 2000 | $126,815 | $220,494 | 2025-06 |
| Stonington Village Improvement Association Incorporated | Community improvement and capacity building | 501(c)(3) | 1953 | $111,279 | $366,239 | 2026-03 |
| Friends of Stonington Crew Inc | Recreation and sports | 501(c)(3) | 2001 | $103,181 | $75,882 | 2025-12 |
| Edward Miller Est Residue Cotr Uw 323-306148840 | 501(c)(91) | 1970 | $76,568 | $1.1 million | 2025-09 | |
| Deans Mill Elementary School Parent Teacher Organization | Education | 501(c)(3) | 2005 | $55,513 | $17,473 | 2025-06 |
| Free Wheelin Foundation | Human services | 501(c)(3) | 2022 | $51,220 | $46,032 | 2024-12 |
| Stonington Land Trust Inc | Environment | 501(c)(3) | 2007 | $32,415 | $2.8 million | 2025-06 |
| Swedish Womens Educational Association | Arts, culture and humanities | 501(c)(3) | 1979 | $32,247 | $272,994 | 2025-12 |
| Allgood Studios & Gallery Inc | Arts, culture and humanities | 501(c)(3) | 2026 | |||
| American Legion | 501(c)(19) | 1946 | $0 | $0 | 2025-12 | |
| Bagel Grants Inc | Science and technology | 501(c)(3) | 2025 | |||
| Broadway Theatre Studio Foundation | Arts, culture and humanities | 501(c)(3) | 2019 | $0 | $0 | 2025-12 |
| Calvary Episcopal Church | 501(c)(3) | 1944 | ||||
| Castle Family Foundation | Philanthropy, voluntarism and grantmaking foundations | 501(c)(3) | 1999 | $206,831 | 2025-12 | |
| Coast Guard Foundation Inc | Public and societal benefit | 501(c)(3) | 2025 | $0 | $0 | 2025-12 |
| Compassionate Heart Ministries | Religion-related | 501(c)(3) | 1998 | $0 | $0 | 2024-12 |
| Connecticut Education Association | 501(c)(5) | 1971 | $0 | $0 | 2025-06 | |
| Connecticut Martime Coalition Inc | Community improvement and capacity building | 501(c)(6) | 2000 | $0 | $1,798 | 2025-12 |
| Connecticut Student Journalism Collaborative Inc | Education | 501(c)(3) | 2024 | $0 | $0 | 2026-06 |
| Conneticut Maritime Foundation Inc | Environment | 501(c)(3) | 2003 | $7,054 | 2025-12 | |
| Crane Charitable Trust | Philanthropy, voluntarism and grantmaking foundations | 501(c)(3) | 2014 | $3.5 million | 2025-12 | |
| Cush Inc | Education | 501(c)(3) | 2007 | $0 | $0 | 2025-12 |
| Department of Rhode Island Auxiliar Y VFW | Public and societal benefit | 501(c)(19) | 2010 | $0 | $0 | 2025-06 |
| Earth Optimist Club | Environment | 501(c)(3) | 2024 | $0 | $0 | 2025-12 |
| Eugene Atwood Fund | 501(c)(3) | 1999 | $1.9 million | 2026-03 | ||
| Federated Garden Clubs of Connecticut Inc | Environment | 501(c)(3) | 1967 | $0 | $0 | 2025-06 |
| Fromson Foundation Inc | 501(c)(3) | 1983 | $55,487 | 2024-11 | ||
| Goodies Run Inc | Food, agriculture and nutrition | 501(c)(3) | 2025 | $0 | $0 | 2024-12 |
| International Assoc of Local and Regional Funds in Emer Countries | International, foreign affairs and national security | 501(c)(6) | 2004 | |||
| James P Verhalen Family Foundation Inc | Philanthropy, voluntarism and grantmaking foundations | 501(c)(3) | 2000 | $4.3 million | 2024-12 | |
| Marine Chemists Association Inc | 501(c)(3) | 1980 | $170,739 | 2024-12 | ||
| Marks Family Foundation | Philanthropy, voluntarism and grantmaking foundations | 501(c)(3) | 2001 | $2.5 million | 2024-12 | |
| Mind Energy Innovations Inc | Health care | 501(c)(3) | 2017 | $0 | $0 | 2023-12 |
| Mudratz Incorporated | Recreation and sports | 501(c)(3) | 2024 | $0 | $0 | 2025-12 |
| Mystic Paper Beasts Incorporated | Arts, culture and humanities | 501(c)(3) | 1977 | $0 | $0 | 2025-12 |
| New London United Inc | Community improvement and capacity building | 501(c)(4) | 2013 | $0 | $0 | 2025-12 |
| Plexus Institute Inc | Arts, culture and humanities | 501(c)(3) | 2001 | $0 | $0 | 2024-12 |
| Portuguese Holy Ghost Society Foundation Inc | Philanthropy, voluntarism and grantmaking foundations | 501(c)(3) | 2026 | |||
| Quiambaug Fire Co | Public safety, disaster preparedness and relief | 501(c)(3) | 2012 | $0 | $0 | 2026-06 |
| Robert G Youngs Family Foundation Inc | Philanthropy, voluntarism and grantmaking foundations | 501(c)(3) | 2012 | $171,907 | 2025-12 | |
| Rotary International | 501(c)(4) | 1958 | $0 | $0 | 2026-06 | |
| Sergio Franchi Music Foundation | Arts, culture and humanities | 501(c)(3) | 2019 | $951,981 | 2025-12 | |
| Spirit Wind Center Inc | Arts, culture and humanities | 501(c)(3) | 2014 | $0 | $0 | 2025-12 |
| Stonington Borough Volunteer Fire Company Inc | Public safety, disaster preparedness and relief | 501(c)(3) | 2014 | $0 | $0 | 2025-06 |
| Stonington Cemetery Association Foundation | Philanthropy, voluntarism and grantmaking foundations | 501(c)(3) | 2025 | $0 | $0 | 2026-06 |
| Stonington Small Boat Association Inc | 501(c)(7) | 1985 | $0 | $0 | 2025-12 | |
| Stonington Soccer Tournament | Recreation and sports | 501(c)(3) | 2025 | $0 | $0 | 2025-12 |
| Summit Missing Animal Response Team Inc | Animal-related | 501(c)(3) | 2014 | $0 | $0 | 2025-12 |
| Teammates for Life Inc | Human services | 501(c)(3) | 2015 | $0 | $0 | 2025-12 |
| The Sea Life Foundation Inc | Environment | 501(c)(3) | 2026 | $0 | $0 | 2026-03 |
| The Woodhaven Foundation | 501(c)(3) | 1998 | $1.8 million | 2025-12 | ||
| The@michael M Wiseman and Helen A Garten Charitable Foundation | Philanthropy, voluntarism and grantmaking foundations | 501(c)(3) | 2001 | $723,895 | 2025-12 | |
| United Church | 501(c)(3) | 1955 | ||||
| Waldron-Williams Fund Inc | Human services | 501(c)(3) | 2022 | $0 | $0 | 2025-12 |
| Wimpfheimer Foundation Inc | 501(c)(3) | 1953 | $622,205 | 2025-12 |
By cause in Stonington, CT
- Arts, culture and humanities 12
- Philanthropy, voluntarism and grantmaking foundations 9
- Recreation and sports 7
- Human services 7
- Environment 5
- Education 4
- Community improvement and capacity building 4
- Public and societal benefit 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.