Data / Nonprofits / New York / Brookville
Nonprofits in Brookville, NY: 34 registered with the IRS
34 nonprofits are registered with the IRS in Brookville, NY, 33 of them 501(c)(3) charities; the 16 that report revenue took in $814.2 million. The largest by revenue: Long Island University ($491.3 million), Nysarc Inc ($167.3 million), Citizens Options Unlimited Inc ($80.8 million). Most common causes: human services (8), philanthropy, voluntarism and grantmaking foundations (4), housing and shelter (4).
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Every organization, largest by revenue first
| Organization | Category | Type | Since | Revenue | Assets | Filing |
|---|---|---|---|---|---|---|
| Long Island University | 501(c)(3) | 1942 | $491.3 million | $1.18 billion | 2025-08 | |
| Nysarc Inc | Human services | 501(c)(3) | 1954 | $167.3 million | $180.9 million | 2024-12 |
| Citizens Options Unlimited Inc | 501(c)(3) | 2008 | $80.8 million | $37 million | 2024-12 | |
| Brookville Center for Childrens Services Inc | Human services | 501(c)(3) | 2003 | $59.2 million | $22.5 million | 2025-06 |
| Advantage Care Diagnostic and Treatment Center Inc | Human services | 501(c)(3) | 2003 | $8.7 million | $10.7 million | 2024-12 |
| Nassau County Ahrc Foundation Inc | Philanthropy, voluntarism and grantmaking foundations | 501(c)(3) | 1995 | $5.3 million | $65.4 million | 2025-12 |
| Community Services Support Corporation | Human services | 501(c)(3) | 1978 | $859,590 | $17.1 million | 2024-12 |
| Mental Retardation Communityservices of Nassau County - Project | Housing and shelter | 501(c)(3) | 2007 | $179,171 | $2 million | 2024-12 |
| MRCS V Inc | Human services | 501(c)(3) | 2014 | $177,783 | $2.6 million | 2024-12 |
| American Federation of Teachers | 501(c)(5) | 1945 | $139,700 | $179,353 | 2025-08 | |
| Mental Retardation Community Services of Nassau County-Project | Housing and shelter | 501(c)(3) | 2008 | $113,605 | $1.9 million | 2024-12 |
| Mental Retardation Community Services of Nassau County Inc | Human services | 501(c)(3) | 2000 | $54,926 | $505,451 | 2024-12 |
| Mental Retardation Community Serv of Nassau Cty-Project II Inc | Housing and shelter | 501(c)(3) | 2006 | $54,326 | $1.2 million | 2024-12 |
| Old Tennis Club Inc | Recreation and sports | 501(c)(3) | 2020 | $29,121 | $759,671 | 2024-12 |
| Nassau Community Mental Retardation Services Company Inc | Human services | 501(c)(3) | 1970 | $23,306 | $667,614 | 2025-06 |
| Pediatric Kidney Foundation Inc | Diseases, disorders and medical disciplines | 501(c)(3) | 2002 | $16,581 | $68,907 | 2024-12 |
| A-Team Elite Ny Rescue Dogs Inc | Animal-related | 501(c)(3) | 2025 | |||
| Amy Beck Charitable Foundation | Philanthropy, voluntarism and grantmaking foundations | 501(c)(3) | 2013 | $1.9 million | 2024-12 | |
| Brookville Park Foundation Inc | Community improvement and capacity building | 501(c)(3) | 1982 | $0 | $0 | 2025-12 |
| Christian Missionary of Mokpo Inc | Religion-related | 501(c)(3) | 1999 | |||
| Genetic Cancer Research Fund Inc | Medical research | 501(c)(3) | 2011 | $0 | $0 | 2025-12 |
| Greek Orthodox Church of the Holy Resurrection of Brookville Ny Inc | Religion-related | 501(c)(3) | 2022 | |||
| Long Island Regional Advisory Council On Higher Education | 501(c)(3) | 1973 | $0 | $43,407 | 2025-06 | |
| Lutheran High School Association of Nassau and Suffolk Counties | 501(c)(3) | 1941 | ||||
| Marilyn and Barry Rubenstein Family Foundation | 501(c)(3) | 1993 | $1.3 million | 2025-06 | ||
| Metropolitan Community Partners Inc | Human services | 501(c)(3) | 2019 | $1 | 2025-12 | |
| Nathaniel D & Golda Berlin Charitable Foundation | Housing and shelter | 501(c)(3) | 2000 | $1.4 million | 2024-12 | |
| Pat Lyons Foundation | Philanthropy, voluntarism and grantmaking foundations | 501(c)(3) | 2003 | $0 | $0 | 2024-12 |
| Phi Eta Sigma National Honor Society Inc | Education | 501(c)(3) | 2014 | |||
| Psi Chi the National Honor Society in Psychology | 501(c)(3) | 1957 | $0 | $0 | 2025-06 | |
| Sigma Theta Tau International Inc | 501(c)(3) | 1954 | ||||
| Soloist Ensemble Urania Inc | Arts, culture and humanities | 501(c)(3) | 2012 | $0 | $0 | 2026-05 |
| Starmar Foundation | Philanthropy, voluntarism and grantmaking foundations | 501(c)(3) | 2012 | $4.1 million | 2024-12 | |
| The Joyce Green Family Foundation | 501(c)(3) | 1987 | $232,913 | 2024-12 |
By cause in Brookville, NY
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.