46 nonprofits in San Mateo, California. See where $1.0B in donations goes — program spending, CEO pay, and red flags from IRS 990 filings.
| # | Organization | Category | Revenue | Score | AI Insight |
|---|---|---|---|---|---|
| 1 | Roberts Foundation | $210.7M | — | — | |
| 2 | Helen And Sanford Diller Family Foundation | Philanthropy & Grantmaking | $121.4M | — | — |
| 3 | Baszucki Family Foundation | Philanthropy & Grantmaking | $120.5M | — | — |
| 4 | Draper Foundation | Education | $96.6M | — | — |
| 5 | Caminar | Mental Health | $55.1M | — | — |
| 6 | Samaritan House | $33.4M | — | — | |
| 7 | Peninsula Family Service | Human Services | $23.4M | — | — |
| 8 | Peninsula Golf & Country Club | $23.1M | — | — | |
| 9 | Friends Of 40 Baywood Avenue | Arts, Culture & Humanities | $21.8M | — | — |
| 10 | Bay Area Senior Services Inc | Housing & Shelter | $20.6M | — | — |
Every tax-exempt nonprofit in the United States is required to file an IRS Form 990, which discloses financial details including revenue, expenses, assets, executive compensation, and program activities. NonprofitSpending uses AI to analyze these public filings and generate transparency reports for each organization.
For San Mateo, California, we track 46 registered nonprofits. Our AI enrichment process evaluates each organization's spending efficiency, revenue trends, governance practices, and mission alignment to produce a mission score and honest headline. This data helps donors, journalists, researchers, and community members make informed decisions about the nonprofits operating in their city.
Data on this page is sourced from IRS 990 filings, IRS Business Master Files, and supplemented with AI-powered analysis. Filing dates, ruling dates, and financial figures reflect the most recent available data. For the most current information on any organization, click through to its individual transparency report.
There are 46 registered nonprofits in San Mateo, California, with $1.0B in combined annual revenue and $0 in total assets.
The largest nonprofit in San Mateo by revenue is Roberts Foundation with $210.7M in annual revenue.
The most common categories in San Mateo are Human Services, Education, Philanthropy & Grantmaking.
Spending efficiency data is being compiled for nonprofits in San Mateo.
Executive compensation data is being compiled for nonprofits in San Mateo.
You can research any nonprofit in San Mateo by clicking on its name above to view its full AI-powered transparency report. Each report includes IRS 990 financial data, spending breakdowns, executive compensation, revenue trends, and AI-generated risk assessments based on publicly available filings.