Data / Nonprofits / Connecticut / Washington
Nonprofits in Washington, CT: 29 registered with the IRS
29 nonprofits are registered with the IRS in Washington, CT, 26 of them 501(c)(3) charities; the 12 that report revenue took in $42.2 million. The largest by revenue: The Frederick Gunn School Incorporated ($36.7 million), Pilobolus Inc ($2 million), Gunn Memorial Library Inc ($1.1 million). Most common causes: arts, culture and humanities (7), education (5), human services (3).
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Every organization, largest by revenue first
| Organization | Category | Type | Since | Revenue | Assets | Filing |
|---|---|---|---|---|---|---|
| The Frederick Gunn School Incorporated | Education | 501(c)(3) | 1929 | $36.7 million | $129.2 million | 2025-06 |
| Pilobolus Inc | Arts, culture and humanities | 501(c)(3) | 1974 | $2 million | $934,983 | 2025-09 |
| Gunn Memorial Library Inc | 501(c)(3) | 1976 | $1.1 million | $10.7 million | 2025-06 | |
| Conversations On the Green Inc | Education | 501(c)(3) | 2019 | $1 million | $917,048 | 2025-12 |
| Institute for American Indian Studies | Arts, culture and humanities | 501(c)(3) | 1971 | $364,418 | $2.7 million | 2024-12 |
| Washington Ambulance Association Inc | Health care | 501(c)(3) | 2022 | $279,481 | $1 million | 2025-09 |
| Washington Community Fund Inc | Philanthropy, voluntarism and grantmaking foundations | 501(c)(3) | 1953 | $212,568 | $2.3 million | 2026-03 |
| Fundacion Perros Sin Nombre Corporation | Animal-related | 501(c)(3) | 2018 | $173,885 | $157,622 | 2025-12 |
| Washington Friends of Music Inc | Arts, culture and humanities | 501(c)(3) | 2016 | $135,387 | $288,259 | 2025-09 |
| Lake Waramaug Friends Inc | Recreation and sports | 501(c)(3) | 2024 | $76,100 | $32,450 | 2024-12 |
| Connecticut Theatre Exchange Inc | Arts, culture and humanities | 501(c)(3) | 2025 | $52,797 | $14,277 | 2025-12 |
| Fortunate Blessings Foundation Inc | Health care | 501(c)(3) | 1999 | $51,113 | $16,860 | 2024-12 |
| Cloudbreak Inc | Arts, culture and humanities | 501(c)(3) | 2024 | $3,835 | 2025-12 | |
| Connecticut Education Association | 501(c)(5) | 1971 | $0 | $0 | 2025-06 | |
| Hollister House Garden Inc | Arts, culture and humanities | 501(c)(3) | 2022 | $6.4 million | 2025-12 | |
| International Association of Lions Clubs | 501(c)(4) | 1940 | $0 | $0 | 2025-06 | |
| Live Sweet Foundation Inc | Human services | 501(c)(3) | 2026 | |||
| National Junior Athletic Associatio N Inc | Youth development | 501(c)(3) | 2026 | $0 | $0 | 2025-12 |
| National Society of the Daughters of the American Revolution | 501(c)(3) | 1938 | $0 | $0 | 2026-02 | |
| Nettleton Hollow Association Incorporated | Human services | 501(c)(4) | 2014 | $0 | $0 | 2025-12 |
| Shepaug Student Project Foundation Inc | Community improvement and capacity building | 501(c)(3) | 1994 | $0 | $0 | 2024-05 |
| Shepaug Valley School Parent Teacher Organization | Education | 501(c)(3) | 2015 | $0 | $0 | 2025-06 |
| Sing Out CT Inc | Arts, culture and humanities | 501(c)(3) | 2016 | $0 | $0 | 2025-12 |
| Slooh Foundation Inc | Education | 501(c)(3) | 2022 | $0 | $0 | 2025-12 |
| St Johns Foundation Inc | Human services | 501(c)(3) | 2016 | $0 | $0 | 2024-12 |
| The Kestrel Foundation | Philanthropy, voluntarism and grantmaking foundations | 501(c)(3) | 1998 | $13.7 million | 2024-12 | |
| Village Improvement Society Inc | Community improvement and capacity building | 501(c)(3) | 2019 | $0 | $0 | 2024-12 |
| Washington Environmental Council Inc | Environment | 501(c)(3) | 1975 | $0 | $0 | 2025-09 |
| Washington Primary School Pto | Education | 501(c)(3) | 2010 | $0 | $0 | 2025-06 |
By cause in Washington, CT
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.