Data / Nonprofits / New York / Southold
Nonprofits in Southold, NY: 45 registered with the IRS
45 nonprofits are registered with the IRS in Southold, NY, 37 of them 501(c)(3) charities; the 15 that report revenue took in $8.8 million. The largest by revenue: Community Action Southold Town Inc ($3.6 million), Group for the East End Inc ($1.4 million), Southold Free Library ($1.3 million). Most common causes: community improvement and capacity building (4), education (3), arts, culture and humanities (3).
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Every organization, largest by revenue first
| Organization | Category | Type | Since | Revenue | Assets | Filing |
|---|---|---|---|---|---|---|
| Community Action Southold Town Inc | 501(c)(3) | 1994 | $3.6 million | $6.9 million | 2024-12 | |
| Group for the East End Inc | Environment | 501(c)(3) | 1972 | $1.4 million | $2.4 million | 2024-12 |
| Southold Free Library | Education | 501(c)(3) | 1989 | $1.3 million | $5.5 million | 2026-06 |
| Southold Historical Society Inc | 501(c)(3) | 1962 | $609,272 | $3.8 million | 2025-12 | |
| Sea Tow Foundation Inc | Public safety, disaster preparedness and relief | 501(c)(3) | 2007 | $553,662 | $756,081 | 2025-12 |
| Southold Yacht Club Inc | 501(c)(3) | 2014 | $286,523 | $294,597 | 2025-12 | |
| American Legion | 501(c)(19) | 1946 | $203,653 | $251,704 | 2025-12 | |
| Southold Fire Department Inc | Public safety, disaster preparedness and relief | 501(c)(3) | 2012 | $179,714 | $395,562 | 2024-12 |
| Rites of Spring Music Festival Inc | Arts, culture and humanities | 501(c)(3) | 2018 | $153,870 | $51,693 | 2024-12 |
| Custer Institute Inc | 501(c)(3) | 1942 | $125,275 | $199,337 | 2025-06 | |
| Dylan Newman Forever 5 Foundation Inc | Diseases, disorders and medical disciplines | 501(c)(3) | 2022 | $110,611 | $106,100 | 2024-12 |
| Rotary Club of Southold Charitable Fund Inc | Human services | 501(c)(3) | 2017 | $70,201 | $70,497 | 2025-06 |
| North Fork Chamber of Commerce | 501(c)(6) | 1988 | $48,128 | $34,420 | 2025-12 | |
| Incorporated Long Island CHPT of the N Y State Archaeological Assoc | Arts, culture and humanities | 501(c)(3) | 2014 | $28,445 | $468,333 | 2025-12 |
| Rotary International | 501(c)(4) | 1958 | $5,938 | $5,246 | 2025-06 | |
| American Federation of Teachers | 501(c)(5) | 1967 | $0 | $0 | 2025-06 | |
| American Legion Auxiliary | 501(c)(19) | 1946 | $0 | $0 | 2025-12 | |
| Be Well Kairos Foundation Inc | Community improvement and capacity building | 501(c)(3) | 2023 | $0 | $0 | 2025-05 |
| Church of the Open Door Ministries Incorporated | 501(c)(3) | 1984 | ||||
| Civil Service Employees Association | 501(c)(5) | 1970 | $0 | $0 | 2025-09 | |
| Dannys Wish | Philanthropy, voluntarism and grantmaking foundations | 501(c)(3) | 2009 | $0 | $0 | 2023-12 |
| East End Marine Farmers Association Inc | Community improvement and capacity building | 501(c)(6) | 2022 | $0 | $0 | 2024-12 |
| Faith Gospel Missionary Outreach | Religion-related | 501(c)(3) | 2003 | $0 | $0 | 2024-12 |
| Faith Reformed Baptist Church Inc | Religion-related | 501(c)(3) | 1999 | |||
| First Church Congregation Or Society in Southold | 501(c)(3) | 1964 | ||||
| First Church of Christ Scientist | 501(c)(3) | 1941 | ||||
| First Universalist Church of Southold | 501(c)(3) | 1973 | ||||
| Friends of the Southold Free Library | 501(c)(3) | 1970 | $0 | $0 | 2025-07 | |
| Little League Baseball Inc | 501(c)(3) | 1967 | $0 | $0 | 2025-09 | |
| Long Island Tumor Registrars Association | 501(c)(3) | 1986 | $0 | $0 | 2025-12 | |
| North Fork Promotion Council Inc | Community improvement and capacity building | 501(c)(6) | 2011 | $0 | $0 | 2025-12 |
| North Fork Reform Synagougue | Religion-related | 501(c)(3) | 2016 | |||
| North Fork Volunteer Rescue Squad Association Inc | Health care | 501(c)(3) | 2013 | $0 | $0 | 2025-12 |
| Peconic Southold Civic Association Inc | Community improvement and capacity building | 501(c)(3) | 2026 | |||
| Peter K Ruhry Keys To Hope Foundation Inc | Human services | 501(c)(3) | 2012 | $0 | $0 | 2025-12 |
| Pta New York Congress | 501(c)(3) | 1962 | $0 | $0 | 2026-06 | |
| Rosenblatt Foundation | Philanthropy, voluntarism and grantmaking foundations | 501(c)(3) | 1999 | $630,818 | 2024-12 | |
| Southold Mothers Club Inc | Education | 501(c)(3) | 2023 | $0 | $0 | 2025-12 |
| Southold School Athletic Association | Recreation and sports | 501(c)(3) | 2018 | $0 | $0 | 2026-06 |
| Southold School Educational Foundation | Education | 501(c)(3) | 2014 | $0 | $0 | 2026-06 |
| Southold Sunshine Society Inc | Human services | 501(c)(3) | 2007 | $0 | $0 | 2025-12 |
| Southold Voice Inc | Environment | 501(c)(3) | 2009 | $0 | $13,652 | 2024-12 |
| Summer Showcase Concert Series of Southold Inc | Arts, culture and humanities | 501(c)(3) | 2016 | $0 | $0 | 2025-12 |
| The Guidance Center Services Inc | Crime and legal-related | 501(c)(3) | 2007 | $0 | $0 | 2025-12 |
| True Light Church | 501(c)(3) | 1964 |
By cause in Southold, NY
- Community improvement and capacity building 4
- Education 3
- Arts, culture and humanities 3
- Religion-related 3
- Human services 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.