Data / Nonprofits / Florida / Marathon
Nonprofits in Marathon, FL: 87 registered with the IRS
87 nonprofits are registered with the IRS in Marathon, FL, 73 of them 501(c)(3) charities; the 35 that report revenue took in $136.1 million. The largest by revenue: Fishermens Health Inc ($97.9 million), Guidance Care Center Inc ($15.3 million), Hidden Harbor Marine Environmental Project Inc ($5.4 million). Most common causes: human services (10), animal-related (9), public safety, disaster preparedness and relief (5).
SpecStream is the live web data engine for teams and agents. It reads the IRS register of exempt organizations as the IRS updates it, and this page is that reading. Ask for the nonprofits you need by place, cause and size, with their latest Form 990 figures and websites, and they arrive in your sheet, CRM, Slack or agent.
Every organization, largest by revenue first
| Organization | Category | Type | Since | Revenue | Assets | Filing |
|---|---|---|---|---|---|---|
| Fishermens Health Inc | Health care | 501(c)(3) | 2017 | $97.9 million | $69.5 million | 2025-09 |
| Guidance Care Center Inc | 501(c)(3) | 1975 | $15.3 million | $11 million | 2025-06 | |
| Hidden Harbor Marine Environmental Project Inc | Animal-related | 501(c)(3) | 1992 | $5.4 million | $16.8 million | 2025-12 |
| Florida Keys Area Health Education Center Program Inc | Health care | 501(c)(3) | 1990 | $3 million | $5.2 million | 2025-06 |
| History Flight | Public and societal benefit | 501(c)(3) | 2024 | $2.4 million | $799,648 | 2022-12 |
| Pigeon Key Foundation | Environment | 501(c)(3) | 1993 | $2.2 million | $3.6 million | 2025-06 |
| Keys Area Interdenominational Resources | Human services | 501(c)(3) | 2000 | $1.5 million | $607,764 | 2024-12 |
| Habitat for Humanity International Inc | Housing and shelter | 501(c)(3) | 1987 | $1.1 million | $8 million | 2025-12 |
| Florida Keys Land & Sea Trust Inc | Environment | 501(c)(3) | 1979 | $1.1 million | $3.1 million | 2025-09 |
| Grace Jones Community Center Inc | Human services | 501(c)(3) | 1987 | $874,866 | $1.9 million | 2025-06 |
| Marathon Yacht Club | 501(c)(7) | 1982 | $655,673 | $1 million | 2026-01 | |
| Community Cooperative Preschool Inc | Human services | 501(c)(3) | 2015 | $611,809 | $29,129 | 2025-06 |
| Marathon Chamber of Commerce | 501(c)(6) | 1945 | $580,741 | $553,822 | 2024-12 | |
| The Marathon Community Theatre Inc | Arts, culture and humanities | 501(c)(3) | 1978 | $528,666 | $439,771 | 2024-06 |
| American Legion Post | 501(c)(19) | 1946 | $478,352 | $1 million | 2025-05 | |
| Safe Harbor Animal Rescue of the Keys Incorpporated | Animal-related | 501(c)(3) | 2014 | $378,775 | $51,863 | 2014-12 |
| Marathon Premier Sailfish Tournament Inc | 501(c)(3) | 2021 | $245,201 | $30,454 | 2025-12 | |
| Benevolent & Protective Order of Elks of the USA | 501(c)(8) | 1951 | $204,146 | $180,848 | 2026-03 | |
| Marathon Lodge No 1058 Loyal Order of Moose | 501(c)(8) | 1935 | $203,850 | $720,168 | 2025-04 | |
| Marathon Wild Bird Center Inc | Animal-related | 501(c)(3) | 2000 | $194,370 | $106,876 | 2025-12 |
| Lionfish Invitational Inc | Food, agriculture and nutrition | 501(c)(3) | 2023 | $170,513 | $328 | 2025-12 |
| Independence Cay Inc | Human services | 501(c)(3) | 2009 | $166,303 | $138,691 | 2025-12 |
| Professional Firefighters of Monroe County Iaff Local 3909 | Employment | 501(c)(5) | 2025 | $159,171 | $111,715 | 2024-12 |
| Monroe County Commercial Fishermen Inc | 501(c)(3) | 1992 | $152,150 | $131,428 | 2025-12 | |
| Heart of the Keys Recreation Association Inc | Recreation and sports | 501(c)(3) | 1993 | $134,791 | $7,705 | 2025-08 |
| Keys Health Ready Coalition Inc | Human services | 501(c)(3) | 2015 | $109,539 | $1,757 | 2025-06 |
| Paytons Promise Inc | Animal-related | 501(c)(3) | 2022 | $104,195 | $44,025 | 2025-12 |
| Marathon Yacht Club Educational Foundation Inc | Education | 501(c)(3) | 2014 | $58,178 | $51,861 | 2025-12 |
| Marathon Garden Club Inc | Environment | 501(c)(3) | 1986 | $49,809 | $706,977 | 2025-04 |
| Zonta Club of Marathon Foundation Inc | Human services | 501(c)(3) | 2012 | $23,152 | $112,768 | 2025-05 |
| Whiskers & Paws Forever of Monroecounty Inc | Animal-related | 501(c)(3) | 2007 | $11,113 | $1 | 2025-12 |
| Valerie Bonzer Foundation for the American Dreamer Inc | Human services | 501(c)(3) | 2023 | $9,000 | $750 | 2025-12 |
| Arkwild Inc | Animal-related | 501(c)(3) | 1999 | $2,477 | $5,329 | 2025-12 |
| Marathon Animal Shelter | Animal-related | 501(c)(3) | 1998 | $2,190 | $636,050 | 2025-12 |
| Florida Keys Hurricane Recovery Foundation Inc | Public safety, disaster preparedness and relief | 501(c)(3) | 2017 | $494 | $53,978 | 2025-12 |
| American Caribbean Charitable Trust Inc | Public safety, disaster preparedness and relief | 501(c)(3) | 2017 | $0 | $0 | 2023-12 |
| American Legion Auxiliary | 501(c)(19) | 1946 | $0 | $0 | 2025-06 | |
| Ancient Undersea Expedition | Education | 501(c)(3) | 2026 | |||
| C B Schmitt Charitable Foundation Inc | Philanthropy, voluntarism and grantmaking foundations | 501(c)(3) | 2003 | $120,490 | 2025-09 | |
| Christopher Massimilian Memorial Fund | Philanthropy, voluntarism and grantmaking foundations | 501(c)(3) | 2017 | $0 | $0 | 2025-12 |
| Diocese of Southeast Florida Saint Columbus Episcopal CH 450 52ND St | 501(c)(3) | 1973 | ||||
| Educational Coalition of Monroe County | Arts, culture and humanities | 501(c)(3) | 2002 | $0 | $0 | 2024-12 |
| Faith Baptist Temple of Marathon Florida Inc | 501(c)(3) | 1976 | ||||
| Fkcanp | Employment | 501(c)(6) | 2015 | $0 | $0 | 2024-12 |
| Florida Health Organization Inc | Community improvement and capacity building | 501(c)(6) | 2009 | $0 | $0 | 2025-06 |
| Florida Keys Citizens Coalition Inc | Environment | 501(c)(3) | 2013 | $0 | $0 | 2025-12 |
| Florida Keys Community Center Inc | Arts, culture and humanities | 501(c)(3) | 2018 | $0 | $151,686 | 2023-12 |
| Florida Keys Ehlers Danlos Society Inc | Diseases, disorders and medical disciplines | 501(c)(3) | 2022 | $0 | $0 | 2022-12 |
| Forgotten Felines of the Florida Keys Inc | Animal-related | 501(c)(3) | 2023 | $0 | $0 | 2025-12 |
| Free & Accepted Masons of Florida | 501(c)(10) | 1941 | $0 | $0 | 2025-12 | |
| Friends of Fred Inc | Human services | 501(c)(3) | 2025 | $0 | $0 | 2025-12 |
| Iglesia Bautista El Faro Marathon Inc | 501(c)(3) | 1969 | ||||
| Island Knights Chapter of the Widows Sons | Human services | 501(c)(3) | 2025 | $0 | $0 | 2024-12 |
| Kirk of the Keys | Religion-related | 501(c)(3) | 2013 | 2012-12 | ||
| Liberty Lighthouse Outreach Ministries Inc | 501(c)(3) | 1986 | ||||
| Marathon Alumni Athletic Club Inc | Human services | 501(c)(3) | 2000 | $0 | $0 | 2024-12 |
| Marathon Association for Youth Development & Athletic Excellence | Youth development | 501(c)(3) | 2016 | $0 | $0 | 2025-12 |
| Marathon Baptist Church Inc | Religion-related | 501(c)(3) | 2018 | |||
| Marathon Fire Rescue Benevolent Association Inc | Public safety, disaster preparedness and relief | 501(c)(3) | 2021 | $0 | $0 | 2024-12 |
| Marathon First Baptist Church | 501(c)(3) | 1969 | ||||
| Marathon Florida Chapter No 1027 Women of the Moose | Mutual and membership benefit | 501(c)(8) | 2012 | $0 | $0 | 2023-04 |
| Marathon Friends of the Library Inc | Education | 501(c)(3) | 2022 | $0 | $0 | 2026-05 |
| Marathon Memorial Foundation Corp | Youth development | 501(c)(3) | 2025 | |||
| Marathon and Lower Keys Association of Realtors Inc | Community improvement and capacity building | 501(c)(6) | 2016 | $0 | $628,601 | 2024-12 |
| Marine Corps League | Community improvement and capacity building | 501(c)(4) | 1946 | $0 | $0 | 2026-06 |
| Martin Luther Chapel | 501(c)(3) | 1941 | ||||
| Micah Missions Inc | International, foreign affairs and national security | 501(c)(3) | 2007 | $0 | $0 | 2024-01 |
| Middle Keys Experimental Aircraft Association Inccorporated | Public and societal benefit | 501(c)(3) | 2001 | $0 | $0 | 2025-12 |
| Monroe County Firefighters Benevolent Association Inc | Public safety, disaster preparedness and relief | 501(c)(3) | 2015 | $0 | $0 | 2025-12 |
| Monroe County Sheriffs Explorers | Public and societal benefit | 501(c)(3) | 2015 | $0 | $0 | 2024-12 |
| New Life Assembly of God | 501(c)(3) | 1964 | ||||
| One Hundred Club of Monroe County Inc | Public safety, disaster preparedness and relief | 501(c)(3) | 2022 | $0 | $0 | 2024-12 |
| Pa Ministries Inc | Religion-related | 501(c)(3) | 2024 | $0 | $0 | 2025-12 |
| Partnership for Policing Innovation and Reform | Crime and legal-related | 501(c)(3) | 2021 | $0 | $6.3 million | 2025-12 |
| Presents in Paradise Inc | Public and societal benefit | 501(c)(3) | 2018 | $0 | $0 | 2025-12 |
| Pro-Form Sports Inc | Recreation and sports | 501(c)(3) | 2026 | |||
| Professional Firefighters of Marathon Inc | Employment | 501(c)(5) | 2025 | $0 | $0 | 2025-09 |
| R3each Inc | Animal-related | 501(c)(3) | 2016 | $0 | $0 | 2025-12 |
| Ruckus Inspires Inc | Youth development | 501(c)(3) | 2025 | $0 | $0 | 2025-12 |
| San Pablo Catholic Parish in Marathon Inc | 501(c)(3) | 1946 | ||||
| Saving Jane Inc | Crime and legal-related | 501(c)(3) | 2025 | |||
| Snow Family Foundation | Philanthropy, voluntarism and grantmaking foundations | 501(c)(3) | 1999 | $1.7 million | 2025-12 | |
| Sustainable Ocean and Reefs Inc | Environment | 501(c)(3) | 2024 | $0 | $1 | 2024-12 |
| The Frances Louise Wolfson Family Foundation Inc | 501(c)(3) | 1993 | $641,526 | 2025-12 | ||
| The Last Resort Ministry Inc | Religion-related | 501(c)(3) | 2018 | $0 | $0 | 2025-12 |
| Tommy Craft Memorial Inc | Education | 501(c)(3) | 2002 | $0 | $0 | 2025-03 |
| United States Power Squadrons | 501(c)(3) | 1949 | $0 | $0 | 2026-01 |
By cause in Marathon, FL
- Human services 10
- Animal-related 9
- Public safety, disaster preparedness and relief 5
- Environment 5
- Education 4
- Public and societal benefit 4
- Religion-related 4
- Community improvement and capacity building 3
- Philanthropy, voluntarism and grantmaking foundations 3
- Employment 3
- Youth development 3
- Arts, culture and humanities 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.