Data / Nonprofits / California / Sonoma / Philanthropy, voluntarism and grantmaking foundations
Philanthropy, voluntarism and grantmaking foundations nonprofits in Sonoma, CA: 14 registered with the IRS
14 philanthropy, voluntarism and grantmaking foundations nonprofits are registered with the IRS in Sonoma, CA, 14 of them 501(c)(3) charities; the 2 that report revenue took in $1.5 million. The largest by revenue: Sonoma Valley Education Foundation ($1.1 million), Women Giving As One Inc ($441,407).
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Every organization, largest by revenue first
| Organization | Type | Since | Revenue | Assets | Filing |
|---|---|---|---|---|---|
| Sonoma Valley Education Foundation | 501(c)(3) | 1993 | $1.1 million | $3 million | 2025-06 |
| Women Giving As One Inc | 501(c)(3) | 2009 | $441,407 | $578,897 | 2024-12 |
| August Sebastiani Charitable Trust | 501(c)(3) | 1996 | $10,831 | 2025-12 | |
| Clark Janis Foundation | 501(c)(3) | 2008 | $8.8 million | 2024-12 | |
| John Christopher Bunting Foundationinc | 501(c)(3) | 2007 | $694,006 | 2025-12 | |
| John and Sandra Leland Foundation | 501(c)(3) | 1997 | $178,219 | 2025-12 | |
| KHR McNeely Family Foundation | 501(c)(3) | 2024 | $257.3 million | 2024-12 | |
| Montgomery Creek Preserve | 501(c)(3) | 2015 | $1.4 million | 2025-12 | |
| Rose Marie Piper Foundation | 501(c)(3) | 2006 | $2 million | 2025-12 | |
| Sfgenealogy | 501(c)(3) | 2016 | $1,519 | 2025-12 | |
| Sonoma Valley Womans Club Foundation | 501(c)(3) | 2015 | $0 | $0 | 2026-05 |
| The Simon J Blattner Jr Foundation | 501(c)(3) | 1997 | $62,193 | 2025-12 | |
| Vadasz Family Foundation | 501(c)(3) | 1997 | $9.4 million | 2025-11 | |
| Zocchi Family Foundation | 501(c)(3) | 1999 | $460,559 | 2025-12 |
Other causes in Sonoma, CA
- Mutual and membership benefit 47
- Arts, culture and humanities 34
- Education 32
- Recreation and sports 20
- Human services 14
- Religion-related 11
- Community improvement and capacity building 10
- Animal-related 9
- Food, agriculture and nutrition 7
- Mental health and crisis intervention 6
- Housing and shelter 5
- Environment 5
- Public safety, disaster preparedness and relief 5
- Youth development 4
- International, foreign affairs and national security 4
- Crime and legal-related 3
- Civil rights, social action and advocacy 3
- Health care 3
- Medical research 3
- Public and societal benefit 3
Every nonprofit in Sonoma, CA · Philanthropy, voluntarism and grantmaking foundations nonprofits across the state · 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.