About San Mateo County
San Mateo County is a county in California (CA) with a population of approximately 726,353 residents. The county seat is .
San Mateo County is one of the counties that make up California, providing local government services including law enforcement, property records, courts, and public infrastructure to its residents.
County Details
- County
- San Mateo County
- State
- California (CA)
- Population
- 726,353
- County Seat
Local Government
San Mateo County residents are served by county-level government that typically includes:
- County commission or board of supervisors — Elected officials responsible for county governance, budgets, and policy
- Sheriff's office — Provides law enforcement services throughout San Mateo County
- County clerk — Manages vital records, elections, and property records
- County courts — The judicial branch serving San Mateo County residents
- Tax assessor — Handles property tax assessments and collections
Getting Involved
Residents of San Mateo County can participate in local government by attending county commission meetings, voting in local elections, and contacting their county and state representatives. Find your elected officials by browsing the California representatives page.
Frequently Asked Questions
What is the population of San Mateo County?
San Mateo County has an approximate population of 726,353 residents.
What is the county seat of San Mateo County?
The county seat of San Mateo County is .
What state is San Mateo County in?
San Mateo County is located in California (CA).