Data / Nonprofits / Maine / Thomaston
Nonprofits in Thomaston, ME: 20 registered with the IRS
20 nonprofits are registered with the IRS in Thomaston, ME, 15 of them 501(c)(3) charities; the 1 that report revenue took in $197,477. The largest by revenue: The General Henry Knox Museum ($197,477). Most common causes: arts, culture and humanities (4).
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Every organization, largest by revenue first
| Organization | Category | Type | Since | Revenue | Assets | Filing |
|---|---|---|---|---|---|---|
| The General Henry Knox Museum | Arts, culture and humanities | 501(c)(3) | 1988 | $197,477 | $2.9 million | 2024-12 |
| Amazon Pueblo | Community improvement and capacity building | 501(c)(3) | 2015 | $0 | $0 | 2024-12 |
| Delta Kappa Gamma Society International | 501(c)(6) | 1965 | $0 | $0 | 2026-06 | |
| Emblem Club of the United States of America Inc | 501(c)(10) | 1949 | $0 | $0 | 2025-08 | |
| Episcopal Church of St John Baptist | 501(c)(3) | 1940 | ||||
| Friends of the Thomaston Public Library | Education | 501(c)(3) | 2004 | $0 | $0 | 2024-12 |
| Midcoast Poetry Calendar | Arts, culture and humanities | 501(c)(3) | 2025 | $0 | $0 | 2025-12 |
| National Society of the Daughters of the American Revolution | 501(c)(3) | 1938 | $0 | $0 | 2026-04 | |
| Owls Head South Thomaston and Thomaston Solid Waste Corporation | Environment | 501(c)(3) | 2009 | |||
| Ramp Foundation | International, foreign affairs and national security | 501(c)(3) | 2021 | $2,849 | 2024-12 | |
| Supreme Emblem Club of the United States | 501(c)(4) | 1949 | $0 | $0 | 2025-06 | |
| Supreme Emblem Club of the United States of America | Mutual and membership benefit | 501(c)(10) | 1949 | $0 | $0 | 2025-12 |
| Supreme Emblem Club of the United States of America-200 | 501(c)(4) | 1967 | $0 | $0 | 2025-06 | |
| Thomaston Assembly of God | 501(c)(3) | 1964 | ||||
| Thomaston Baptist Church | 501(c)(3) | 1955 | 2013-12 | |||
| Thomaston Community Development Cor Poration | Community improvement and capacity building | 501(c)(3) | 2026 | |||
| Thomaston Garden Club | Environment | 501(c)(3) | 2022 | $0 | $0 | 2024-12 |
| Thomaston Historical Society | 501(c)(3) | 1979 | $0 | $0 | 2025-06 | |
| Watts Hall Community Arts | Arts, culture and humanities | 501(c)(3) | 2022 | $0 | $0 | 2023-12 |
| Watts Hall Community Players | Arts, culture and humanities | 501(c)(3) | 2017 | $0 | $0 | 2024-12 |
By cause in Thomaston, ME
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.