Nonprofits in San Mateo, California

46 nonprofits in San Mateo, California. See where $1.0B in donations goes — program spending, CEO pay, and red flags from IRS 990 filings.

46Nonprofits
$1.0BTotal Revenue
$0Total Assets
8Categories

Nonprofit Categories in San Mateo

Human Services: 6 orgs Education: 5 orgs Philanthropy & Grantmaking: 5 orgs Housing & Shelter: 3 orgs Arts, Culture & Humanities: 3 orgs Health Care: 2 orgs Recreation & Sports: 2 orgs Science & Technology: 2 orgs

Top Nonprofits in San Mateo by Revenue

#OrganizationCategoryRevenueScoreAI 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

All San Mateo Organizations (46)

Caminar

Mental Health · $55.1M revenue

Curiodyssey

Arts, Culture & Humanities · $6.6M revenue

Other Cities in California

San Francisco (921) Los Angeles (884) San Diego (462) Sacramento (436) Oakland (385) San Jose (214) Pasadena (171) Fresno (153) Berkeley (148) Irvine (140) Santa Barbara (117) Palo Alto (106) Long Beach (105) San Rafael (95) Santa Ana (94) Santa Rosa (82) Santa Monica (70) Bakersfield (67) Stockton (65) Riverside (61)

About Nonprofit Research in San Mateo

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.

Frequently Asked Questions

How many nonprofits are in San Mateo, California?

There are 46 registered nonprofits in San Mateo, California, with $1.0B in combined annual revenue and $0 in total assets.

What is the largest nonprofit in San Mateo, California?

The largest nonprofit in San Mateo by revenue is Roberts Foundation with $210.7M in annual revenue.

What types of nonprofits operate in San Mateo?

The most common categories in San Mateo are Human Services, Education, Philanthropy & Grantmaking.

How efficient are nonprofits in San Mateo with their spending?

Spending efficiency data is being compiled for nonprofits in San Mateo.

What is the highest executive compensation at a nonprofit in San Mateo?

Executive compensation data is being compiled for nonprofits in San Mateo.

How can I research a nonprofit 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.

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