San Mateo County, officially the County of San Mateo, is a county located in the U.S. state of California. As of the 2020 United States census, the population was 764,442. Redwood City is the county seat, the third-most populated city in the county after Daly City and San Mateo.
- Country
- United States
- Headquarters
- Redwood City
- Inception
- 1856
- Website
- https://smcgov.org
