Data / Nonprofits / Maryland / Prince Frederick
Nonprofits in Prince Frederick, MD: 19 registered with the IRS
19 nonprofits are registered with the IRS in Prince Frederick, MD, 17 of them 501(c)(3) charities; the 5 that report revenue took in $963,234. The largest by revenue: Calvert Aquatics Club Inc ($451,070), Learning Ladders Incorporated ($274,758), Calvert County Historical Society Inc ($112,560). Most common causes: youth development (3).
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Every organization, largest by revenue first
| Organization | Category | Type | Since | Revenue | Assets | Filing |
|---|---|---|---|---|---|---|
| Calvert Aquatics Club Inc | Recreation and sports | 501(c)(3) | 2024 | $451,070 | $91,551 | 2025-07 |
| Learning Ladders Incorporated | Human services | 501(c)(3) | 2013 | $274,758 | $0 | 2025-12 |
| Calvert County Historical Society Inc | 501(c)(3) | 1972 | $112,560 | $1.2 million | 2025-05 | |
| American Legion | 501(c)(19) | 1946 | $66,533 | $3,817 | 2025-06 | |
| Friends of the Calvert County Library Inc | Education | 501(c)(3) | 1999 | $58,313 | $96,065 | 2025-12 |
| Amasiekarr Foundation Inc | Mental health and crisis intervention | 501(c)(3) | 2026 | |||
| Ancient Free & Accepted Masons of Maryland | 501(c)(8) | 1940 | $0 | $0 | 2025-12 | |
| Barstow Pto | Education | 501(c)(3) | 2021 | $0 | $0 | 2026-06 |
| Calvert Rainbow Alliance Inc | Civil rights, social action and advocacy | 501(c)(3) | 2020 | $0 | $0 | 2025-12 |
| Calvert Tide Baseball Inc | Recreation and sports | 501(c)(3) | 2025 | $0 | $0 | 2026-05 |
| Calvert Toastmasters Club | Public and societal benefit | 501(c)(3) | 1945 | $0 | $0 | 2025-12 |
| Full Gospel Assembly of God | 501(c)(3) | 1964 | ||||
| Maryland 4-H Club Foundation Inc | 501(c)(3) | 2013 | $0 | $0 | 2026-06 | |
| Maryland 4-H Club Foundation Inc | 501(c)(3) | 2013 | $0 | $0 | 2026-06 | |
| Maryland 4-H Club Foundation Inc | 501(c)(3) | 2013 | $0 | $0 | 2026-06 | |
| Maryland 4-H Club Foundation Inc | Youth development | 501(c)(3) | 2013 | $0 | $0 | 2026-06 |
| Maryland 4-H Club Foundation Inc | Youth development | 501(c)(3) | 2013 | $0 | $0 | 2026-06 |
| Maryland 4-H Club Foundation Inc | Youth development | 501(c)(3) | 2013 | $0 | $0 | 2025-06 |
| Maryland 4-H Foundation | 501(c)(3) | 2013 | $0 | $0 | 2026-06 |
By cause in Prince Frederick, MD
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.