THE SAN MATEO LAND BRIEF
Land in the
San Francisco Peninsula setting.
San Mateo city has 12.1 square miles of land in San Mateo County. Its Census reference point is in San Francisco Peninsula, within Central California Foothills and Coastal Mountains.
Oak woodland, chaparral and grassland occupy foothills and low coastal mountains around the Central Valley. Narrow agricultural valleys interrupt this landscape of dry summers and wetter winters.
Regional context: Central California Foothills and Coastal Mountains ↗ · Classification at the Census reference point
San Mateo and San Mateo County
San Mateo is associated with San Mateo County in the Census boundary data. Start with the parcel’s tax bill to match the property to that jurisdiction, then confirm which government handles its land use.
San Mateo by land and water
The Census records 3.73 square miles of water within San Mateo, or 23.6% of its total area. It is 15.9 percentage points lower than the 39.5% recorded for San Mateo County. This is geographic context; waterfront status and usable land must be checked at the parcel.
For scale, San Mateo city has 2 times the land area of nearby Hillsborough town (6.17 square miles). These areas describe boundaries, not comparable property prices.

