Data / Nonprofits / Massachusetts / Osterville
Nonprofits in Osterville, MA: 45 registered with the IRS
45 nonprofits are registered with the IRS in Osterville, MA, 38 of them 501(c)(3) charities; the 25 that report revenue took in $39.3 million. The largest by revenue: Wianno Club ($10.3 million), Oyster Harbors Club Inc ($9.1 million), Cape Cod Academy Inc ($9.1 million). Most common causes: philanthropy, voluntarism and grantmaking foundations (9), arts, culture and humanities (5), recreation and sports (4).
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 |
|---|---|---|---|---|---|---|
| Wianno Club | 501(c)(7) | 1938 | $10.3 million | $27.7 million | 2025-10 | |
| Oyster Harbors Club Inc | 501(c)(7) | 1948 | $9.1 million | $30.5 million | 2025-12 | |
| Cape Cod Academy Inc | 501(c)(3) | 1977 | $9.1 million | $10.6 million | 2025-06 | |
| McGraw Motorcycle Museum Foundation | Arts, culture and humanities | 501(c)(3) | 2025 | $2.9 million | $2.8 million | 2025-12 |
| New England States Committee On Electricity | Public and societal benefit | 501(c)(4) | 2011 | $1.6 million | $2 million | 2025-12 |
| Three Bays Preservation Inc | Environment | 501(c)(3) | 1997 | $1.3 million | $5.6 million | 2024-12 |
| Osterville Free Library Corporation | Education | 501(c)(3) | 1957 | $1.1 million | $11.8 million | 2025-06 |
| Wianno Yacht Club | 501(c)(7) | 1949 | $733,828 | $915,211 | 2024-12 | |
| The Oyster Harbors Club Scholarship Fund Inc | 501(c)(3) | 1988 | $682,087 | $1.5 million | 2025-12 | |
| Cape Cod Chamber Music Festival Inc | Arts, culture and humanities | 501(c)(3) | 1980 | $442,773 | $1.2 million | 2025-10 |
| Cranberry Sunset Farm Inc | Human services | 501(c)(3) | 2014 | $383,031 | $1.8 million | 2025-12 |
| Cape Cod Challenger Club Inc | Recreation and sports | 501(c)(3) | 2006 | $295,922 | $97,830 | 2025-12 |
| Massachusetts Organization of Educational Collaboratives | Education | 501(c)(3) | 1997 | $248,531 | $126,178 | 2025-06 |
| Osterville Historical Society Inc | 501(c)(3) | 1960 | $248,262 | $2.8 million | 2024-12 | |
| Osterville Anglers Club Inc | Recreation and sports | 501(c)(7) | 1993 | $171,263 | $181,607 | 2025-12 |
| Cape Cod Writers Center Inc | Arts, culture and humanities | 501(c)(3) | 1978 | $140,082 | $734,918 | 2025-09 |
| Cotocheset Historic Preservation Trust Inc | Arts, culture and humanities | 501(c)(3) | 2009 | $135,659 | $564,243 | 2025-12 |
| Osterville Village Assocation | Community improvement and capacity building | 501(c)(4) | 2006 | $69,250 | $46,198 | 2026-05 |
| Osterville Rotary Foundation Inc | Philanthropy, voluntarism and grantmaking foundations | 501(c)(3) | 2016 | $66,016 | $49,523 | 2025-06 |
| New England Society for Abandoned Animals Inc | Animal-related | 501(c)(3) | 2007 | $64,725 | $125,471 | 2024-12 |
| Cape Cod Senior Babe Ruth Inc | Recreation and sports | 501(c)(3) | 1997 | $22,895 | $15,698 | 2025-12 |
| Barnstable Girls Lacrosse | Recreation and sports | 501(c)(3) | 2021 | $21,975 | $30,195 | 2025-12 |
| Garden Club Federation of Massacuse TTS Inc | Environment | 501(c)(3) | 2004 | $20,518 | $87,117 | 2025-06 |
| Rotary International | 501(c)(4) | 1942 | $12,844 | $1,657 | 2025-06 | |
| Hamblin Bogs Inc | Science and technology | 501(c)(3) | 2023 | $1,300 | $99,813 | 2024-12 |
| Ahn Family Foundation Trust Ua 112497 | Philanthropy, voluntarism and grantmaking foundations | 501(c)(3) | 1998 | $4.2 million | 2024-12 | |
| Barnstable High School Girls Lacros Se Boosters Inc | Education | 501(c)(3) | 2026 | $0 | $0 | 2026-06 |
| Bayberry Christian Adventist School | 501(c)(3) | 1947 | ||||
| Bright Promises Pre-School Inc | 501(c)(3) | 1971 | ||||
| Cape Cod Collaborative | Housing and shelter | 501(c)(3) | 1993 | |||
| Daniel Family Charitable Foundation | Philanthropy, voluntarism and grantmaking foundations | 501(c)(3) | 2006 | $389,958 | 2024-12 | |
| Gregory Family Foundation Inc | Philanthropy, voluntarism and grantmaking foundations | 501(c)(3) | 1990 | $162,927 | 2025-12 | |
| Help Tibetan Nuns Inc | International, foreign affairs and national security | 501(c)(3) | 2016 | $0 | $0 | 2024-12 |
| Ingeborg Foundation | Philanthropy, voluntarism and grantmaking foundations | 501(c)(3) | 1998 | $546,087 | 2025-12 | |
| Islamic Center of Cape Cod Inc | Religion-related | 501(c)(3) | 2002 | |||
| Jake & Ann Orourke Memorial Fund | Food, agriculture and nutrition | 501(c)(3) | 2026 | |||
| John L McGraw and Marjorie P McGraw Charitable Foundation | 501(c)(3) | 2023 | $5.3 million | 2025-12 | ||
| Lois Weber Film Festival | Arts, culture and humanities | 501(c)(3) | 2024 | $2,600 | 2024-12 | |
| Mayahs Militia Inc | Diseases, disorders and medical disciplines | 501(c)(3) | 2023 | $0 | $0 | 2023-12 |
| Osterville Baptist Church | 501(c)(3) | 1972 | ||||
| Pemberton Family Foundation Inc | Philanthropy, voluntarism and grantmaking foundations | 501(c)(3) | 1998 | $2.3 million | 2025-06 | |
| St Peters Church Nursery School Inc | 501(c)(3) | 1984 | $0 | $0 | 2025-06 | |
| The Nicholas and Marion Madonna Foundation | Philanthropy, voluntarism and grantmaking foundations | 501(c)(3) | 2007 | $4.1 million | 2024-12 | |
| The Vela Foundation | Philanthropy, voluntarism and grantmaking foundations | 501(c)(3) | 2008 | $12.3 million | 2024-12 | |
| Zammer Foundation of Cape Cod | Philanthropy, voluntarism and grantmaking foundations | 501(c)(3) | 2019 | $216,066 | 2024-12 |
By cause in Osterville, MA
- Philanthropy, voluntarism and grantmaking foundations 9
- Arts, culture and humanities 5
- Recreation and sports 4
- Education 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.