San Mateo County, California

What we have for San Mateo County today, and what is coming.

Basics

County code (FIPS): 06081
Land area: 449 square miles
Population: 764,442

Federal money spent here

Fiscal year 2026: $5.4 billion in federal contracts, grants, loans and other awards for work done in San Mateo County.

Explore on USAspending.gov

Who represents San Mateo County

U.S. Senate (whole state): Alex Padilla (Democrat), Adam B. Schiff (Democrat).

U.S. House districts that include part of this county

District	Member	Share of county land
Congressional District 16	Sam T. Liccardo (Democrat)	75.3%
Congressional District 15	Kevin Mullin (Democrat)	24.7%

State senate districts

District	Member	Share of county land
State Senate District 13	Josh Becker (Democratic)	96.1%
State Senate District 11	Scott Wiener (Democratic)	3.9%

State house / assembly districts

District	Member	Share of county land
Assembly District 23	Marc Berman (Democratic)	75.4%
Assembly District 21	Diane Papan (Democratic)	20.6%
Assembly District 19	Catherine Stefani (Democratic)	3.9%

Matched by district number using the U.S. Census Bureau 2020 county–district relationship files (land area overlap; districts may have been redrawn since). Your exact district depends on your address: U.S. House · state legislators.

County government

Find the official county website and contacts in the USA.gov local government directory or the National Association of Counties explorer.

Coming next for counties: county commission meetings and agendas, county budgets, local ballot measures and election results. We add each one as soon as a public, reliable feed exists for it. Know a good source? Tell us.

Sources: U.S. Census Bureau Gazetteer (county list, public domain); USAspending.gov (U.S. Treasury). Built 2026-11-03 15:28.