Data / Nonprofits / New York / Armonk
Nonprofits in Armonk, NY: 97 registered with the IRS
97 nonprofits are registered with the IRS in Armonk, NY, 77 of them 501(c)(3) charities; the 39 that report revenue took in $55.7 million. The largest by revenue: Opengate Inc ($26.2 million), International Brotherhood of Electrical Workers Welfare Fund 17 ($4.7 million), Montessori Childrens Room ($4.3 million). Most common causes: philanthropy, voluntarism and grantmaking foundations (19), education (8), community improvement and capacity building (7).
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Every organization, largest by revenue first
| Organization | Category | Type | Since | Revenue | Assets | Filing |
|---|---|---|---|---|---|---|
| Opengate Inc | Human services | 501(c)(3) | 1969 | $26.2 million | $24.3 million | 2024-12 |
| International Brotherhood of Electrical Workers Welfare Fund 17 | 501(c)(9) | 1953 | $4.7 million | $2.9 million | 2024-12 | |
| Montessori Childrens Room | Education | 501(c)(3) | 1983 | $4.3 million | $4.3 million | 2025-06 |
| Insead Management Education Foundation | International, foreign affairs and national security | 501(c)(3) | 1966 | $3.4 million | $607,272 | 2024-12 |
| 914 Cares Inc | Philanthropy, voluntarism and grantmaking foundations | 501(c)(3) | 2016 | $3.4 million | $2.4 million | 2025-12 |
| Builders Institute of Westchester & Putnam Counties Inc | 501(c)(6) | 1947 | $1.7 million | $6 million | 2024-12 | |
| Kisco Foundation Inc | Community improvement and capacity building | 501(c)(3) | 2002 | $1.6 million | $18.4 million | 2024-12 |
| Windmill Club Inc Windmill Farm | 501(c)(7) | 1956 | $1.5 million | $540,312 | 2025-12 | |
| St Nersess Armenian Seminary Inc | 501(c)(3) | 1976 | $1.4 million | $21.6 million | 2025-05 | |
| International Brotherhood of Electrical Workers | 501(c)(5) | 1940 | $1.3 million | $358,020 | 2025-12 | |
| Armonk Childrens Corner Inc | 501(c)(3) | 1985 | $957,212 | $921,050 | 2025-06 | |
| Byram Hills Teachers Association Benefit Fund | 501(c)(9) | 1982 | $758,336 | $1.1 million | 2025-06 | |
| Byram Hills Education Foundation Inc | Education | 501(c)(3) | 1995 | $638,301 | $1.1 million | 2025-06 |
| Armonk Independent Fire Company Inc | Public safety, disaster preparedness and relief | 501(c)(3) | 2018 | $385,826 | $229,306 | 2025-12 |
| Technology Business Management Council LTD | Community improvement and capacity building | 501(c)(6) | 2015 | $358,176 | $1.3 million | 2024-12 |
| Reconnecting Ministries Inc | Religion-related | 501(c)(3) | 2014 | $248,843 | $59,633 | 2025-12 |
| Friends of the North Castle Public Library Inc | Philanthropy, voluntarism and grantmaking foundations | 501(c)(3) | 1995 | $244,066 | $552,092 | 2024-12 |
| Byram Hills Youth Lacrosse Inc | Recreation and sports | 501(c)(3) | 2001 | $232,656 | $83,520 | 2024-12 |
| American Federation of Teachers | 501(c)(5) | 1967 | $228,120 | $50,845 | 2025-08 | |
| The Atlantieist Support Foundation | Education | 501(c)(3) | 2011 | $217,512 | $6,388 | 2024-12 |
| Whippoorwill Club Inc | 501(c)(7) | 1948 | $207,711 | $38.1 million | 2024-12 | |
| Little League Baseball Inc | Recreation and sports | 501(c)(3) | 1981 | $198,451 | $268,747 | 2025-09 |
| North Castle Historical Society | Arts, culture and humanities | 501(c)(3) | 1972 | $191,824 | $1.7 million | 2025-12 |
| International Association of Lions Clubs | Community improvement and capacity building | 501(c)(4) | 1940 | $187,306 | $85,740 | 2026-06 |
| The Police Benevolent Association of the Town of North Castle Inc | Employment | 501(c)(5) | 2002 | $146,337 | $277,366 | 2024-12 |
| Museum of Ceramic Art-New York | Arts, culture and humanities | 501(c)(3) | 2000 | $141,565 | $124,027 | 2025-12 |
| Pta New York Congress | 501(c)(3) | 1966 | $134,352 | $366,750 | 2025-06 | |
| Armonk Chamber of Commerce Inc | Community improvement and capacity building | 501(c)(6) | 2018 | $131,881 | $55,628 | 2024-12 |
| Promotional Fund of the Terrazzo & Mosaic Contractors Association of | 501(c)(6) | 1962 | $124,090 | $802,611 | 2024-12 | |
| Friends of Ucbm Inc | Philanthropy, voluntarism and grantmaking foundations | 501(c)(3) | 2024 | $85,400 | $85,346 | 2024-12 |
| Joint Industry Advancement Fund | 501(c)(6) | 1973 | $76,329 | $3,972 | 2024-12 | |
| Stayin Alive | Public safety, disaster preparedness and relief | 501(c)(3) | 2014 | $63,693 | $12,934 | 2025-12 |
| Society for Preservation & Encourmt of Barbershop Quartet Singing Amer | Arts, culture and humanities | 501(c)(3) | 1946 | $60,736 | $58,923 | 2025-12 |
| Joseph B Corpina Jr Memorial Foundation Inc | 501(c)(3) | 1984 | $44,674 | $280,689 | 2025-12 | |
| Byram Hills Preschool Association Inc | 501(c)(3) | 1994 | $28,638 | $77,855 | 2025-06 | |
| American Legion Auxiliary | 501(c)(19) | 1946 | $28,636 | $133,123 | 2025-12 | |
| Tzahal Shalom of N Westchester Incorporated | International, foreign affairs and national security | 501(c)(3) | 2015 | $20,454 | $401,268 | 2024-12 |
| Marble Terrazzo Mosaic & Specialties Contractors Associatio | 501(c)(6) | 1973 | $2,865 | $108,807 | 2024-12 | |
| Romeo Milio Lynch Syndrome Foundation | Health care | 501(c)(3) | 2012 | $1 | $24,617 | 2024-12 |
| Andree Wildenstein Dormeuil and Roger Dormeuil Foundation | 501(c)(3) | 1986 | $10.4 million | 2025-12 | ||
| Armonk Alliance Church of the Christian Missionary Alliance | 501(c)(3) | 1972 | 2014-12 | |||
| Armonk Community Foundation | Philanthropy, voluntarism and grantmaking foundations | 501(c)(3) | 2000 | $0 | $0 | 2025-12 |
| Armonk Youth Flag Football League | Youth development | 501(c)(3) | 2026 | |||
| Building & Allied Construction Industries of Westchester Inc | Community improvement and capacity building | 501(c)(6) | 2019 | $0 | $0 | 2025-12 |
| Byram Hills Bobcat Boosters Inc | Education | 501(c)(3) | 2007 | $0 | $0 | 2026-07 |
| Cabbage Hill Farm Foundation Inc | 501(c)(3) | 1997 | $4.3 million | 2024-12 | ||
| Career Chats | Employment | 501(c)(3) | 2024 | $0 | $0 | 2025-12 |
| Carol and George Henry Family Foundation | 501(c)(3) | 1987 | $6.8 million | 2025-12 | ||
| Chabad of Armonk Chappaqua and Pleasantville Inc | Religion-related | 501(c)(3) | 2016 | |||
| Chang K Park Foundation | Philanthropy, voluntarism and grantmaking foundations | 501(c)(3) | 2008 | $30.9 million | 2025-06 | |
| Congregation B Nai Yisrael of Armonk | 501(c)(3) | 1981 | ||||
| Congregation Shireinu | Religion-related | 501(c)(3) | 2010 | |||
| Csea 860 822600 Westchester County Town of North Castle | 501(c)(5) | 1970 | $0 | $0 | 2025-09 | |
| Daniel Gray Fishing Club of White Plains N Y Inc | 501(c)(7) | 1966 | $0 | $0 | 2025-12 | |
| Elzbieta & David Grove Private Foundation Inc | Philanthropy, voluntarism and grantmaking foundations | 501(c)(3) | 2025 | $7.1 million | 2024-12 | |
| Empoweringscience Inc | Science and technology | 501(c)(3) | 2021 | $0 | $0 | 2025-12 |
| Flexitoon Puppet Theatre Inc | Arts, culture and humanities | 501(c)(3) | 2010 | $0 | $0 | 2025-12 |
| Friends of Frosty Inc | Food, agriculture and nutrition | 501(c)(3) | 2014 | $0 | $0 | 2024-12 |
| Friends of La Scala Inc | 501(c)(3) | 1981 | $0 | $0 | 2024-05 | |
| Friends of Miller House-Washingtons Headquarters | Arts, culture and humanities | 501(c)(3) | 2014 | $0 | $0 | 2023-12 |
| Fund for Education and Emotional Development Inc | Education | 501(c)(3) | 2011 | $0 | $3,779 | 2024-12 |
| Gerstner Family Foundation | Philanthropy, voluntarism and grantmaking foundations | 501(c)(3) | 2007 | $157.9 million | 2024-12 | |
| Global Ummah Foundation | Human services | 501(c)(3) | 2023 | $0 | $0 | 2024-12 |
| Grossman Family Philanthropic Foundation | Philanthropy, voluntarism and grantmaking foundations | 501(c)(3) | 2006 | $12.1 million | 2025-12 | |
| Hammy Rel13f Fund Inc | Diseases, disorders and medical disciplines | 501(c)(3) | 2022 | $1,134 | 2025-04 | |
| Hayworth Family Foundation | Philanthropy, voluntarism and grantmaking foundations | 501(c)(3) | 2024 | $959,959 | 2024-12 | |
| Heavenly Productions Foundation | Philanthropy, voluntarism and grantmaking foundations | 501(c)(3) | 2005 | $0 | $0 | 2025-08 |
| Houston Family Foundation | Philanthropy, voluntarism and grantmaking foundations | 501(c)(3) | 2002 | $2.5 million | 2025-12 | |
| Hudson Valley Fellowship | Religion-related | 501(c)(3) | 2011 | |||
| Ibm International Foundation | International, foreign affairs and national security | 501(c)(3) | 1985 | $357.7 million | 2024-12 | |
| Insight & Foresight Inc | Medical research | 501(c)(3) | 2024 | $0 | $1 | 2024-12 |
| John & Annamaria Phillips Foundation | Education | 501(c)(3) | 1996 | $2.3 million | 2025-12 | |
| Ken Jagroo Foundation Inc | Philanthropy, voluntarism and grantmaking foundations | 501(c)(3) | 2019 | $4.9 million | 2024-12 | |
| Khan Universal Foundation Inc | Public safety, disaster preparedness and relief | 501(c)(3) | 2003 | $47,060 | 2025-12 | |
| Klem Family Foundation Inc | Philanthropy, voluntarism and grantmaking foundations | 501(c)(3) | 2019 | $1.7 million | 2025-12 | |
| Kohlberg Foundation Inc | 501(c)(3) | $209.6 million | 2024-12 | |||
| L & L Foundation | 501(c)(3) | 1964 | $7.2 million | 2025-12 | ||
| Marcelle Picard White Foundation | 501(c)(3) | 1970 | $944,021 | 2025-12 | ||
| National Coli Directors | Community improvement and capacity building | 501(c)(6) | 2010 | $0 | $4,326 | 2023-12 |
| New York Society of Pediatric Critical Care Medicine Inc | Community improvement and capacity building | 501(c)(6) | 2009 | $0 | $0 | 2025-12 |
| Parks Family Foundation Inc | Philanthropy, voluntarism and grantmaking foundations | 501(c)(3) | 2024 | |||
| Petsncharge Foundation Inc | Animal-related | 501(c)(3) | 2023 | $0 | $0 | 2024-12 |
| Project W Inc | Philanthropy, voluntarism and grantmaking foundations | 501(c)(3) | 2014 | $0 | $4,960 | 2025-07 |
| Protect Residential Rye Association | Environment | 501(c)(3) | 2016 | $0 | $0 | 2025-12 |
| Robert J Seifer Cancer Research Foundation | Philanthropy, voluntarism and grantmaking foundations | 501(c)(3) | 2000 | $84,607 | 2025-12 | |
| Rozov Family Foundation Inc | Philanthropy, voluntarism and grantmaking foundations | 501(c)(3) | 2022 | $313,936 | 2024-12 | |
| Rudolph & Hilda U Forchheimer Foundation Inc | 501(c)(3) | 1967 | $4.5 million | 2025-12 | ||
| Smiles Team Inc | Health care | 501(c)(3) | 2023 | $0 | $0 | 2025-12 |
| Tatiana Piankova Foundation | 501(c)(3) | 1984 | $7.8 million | 2025-07 | ||
| The Madelon Global Health Foundation Inc | Philanthropy, voluntarism and grantmaking foundations | 501(c)(3) | 2019 | $401,418 | 2025-12 | |
| The Salon Family Foundation Inc | Science and technology | 501(c)(3) | 2007 | $1.3 million | 2025-12 | |
| Thomas J Berlinghoff Memorial Fund | Public and societal benefit | 501(c)(3) | 2018 | $0 | $0 | 2024-12 |
| Toastmasters International | 501(c)(3) | 1945 | $0 | $0 | 2025-12 | |
| Vineyard Gazette Journalism Foundation Inc | 501(c)(3) | 1963 | $2.3 million | 2024-12 | ||
| Westchester Area Mathematics Circle Inc | Education | 501(c)(3) | 2022 | $0 | $0 | 2025-12 |
| Whippoorwill Club Foundation Inc | Education | 501(c)(3) | 2000 | $0 | $89,425 | 2024-12 |
| Yudelson Foundation | Philanthropy, voluntarism and grantmaking foundations | 501(c)(3) | 2009 | $1 | 2024-12 |
By cause in Armonk, NY
- Philanthropy, voluntarism and grantmaking foundations 19
- Education 8
- Community improvement and capacity building 7
- Arts, culture and humanities 5
- Religion-related 4
- International, foreign affairs and national security 3
- Public safety, disaster preparedness and relief 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.