San Mateo County, California
San Mateo County occupies the San Francisco Peninsula, just south of San Francisco. Redwood City serves as the county seat and features a revitalized downtown with a history that stretches back to the region’s early settlement.
With a population of about 730,000 people, San Mateo County is closely connected to the Bay Area’s technology industry. Major companies such as Meta have a presence in the county, while San Francisco International Airport is also located here.
Highways 101 and 280 provide major transportation routes through the county, connecting communities with San Francisco and Silicon Valley. Despite its urban and suburban development, San Mateo County also has plenty of open space, hiking trails, and coastal areas to explore.
| Category | Details |
|---|---|
| County Name | San Mateo County |
| County Seat | Redwood City |
| Population | Approximately 730,000 |
| Cities, Towns, and Communities | Redwood City, San Mateo, Daly City, Burlingame, South San Francisco, Menlo Park, Foster City, and others |
| Interstates and Highways | US 101, I-280, SR 92 |
| FIPS Code | 06-081 |
| Total Area (Land and Water) | 448 square miles (Land: 443 sq mi, Water: 5 sq mi) |
| Adjacent Counties (and Direction) | San Francisco County (North), Santa Clara County (Southeast), Santa Cruz County (South) |
| Time Zone | Pacific Standard Time (PST) |
| State | California |
| Coordinates | 37.4419° N, 122.4558° W |
| Etymology | Named after Saint Matthew |
| Major Landmarks | Half Moon Bay, Stanford University, Crystal Springs Reservoir, Filoli Historic House and Garden, San Mateo County History Museum |
PHYSICAL MAP
San Mateo County Topographic Map
This topographic map highlights San Mateo County’s peninsula landscape between the Pacific Ocean and San Francisco Bay. The terrain includes coastal bluffs, inland valleys, and a north-south ridge of hills running through the peninsula.
SATELLITE IMAGERY
San Mateo County Satellite Map
This satellite map shows urban development concentrated along the San Francisco Bay shoreline, while the western slopes facing the Pacific remain comparatively open and less developed. The contrast between built-up areas and natural landscapes is especially clear from above.
OUTLINE MAP
San Mateo County Blank Map
This blank map outlines San Mateo County’s long, narrow shape on the San Francisco Peninsula. The western edge follows the Pacific coastline, while the eastern boundary borders San Francisco Bay.
California County Maps
California County Map
Ever wonder how California’s 58 counties are organized? Our California county map lays them all out, from the Pacific Coast to the vast desert regions. Explore the map to find the counties you know—and perhaps discover a few you don’t.