THE FOSTER CITY LAND BRIEF
Land in the
Bay Flats setting.
Foster City city has 3.79 square miles of land in San Mateo County. Its Census reference point is in Bay Flats, 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
Foster City and San Mateo County
Foster City 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.
Foster City by land and water
The Census records 16 square miles of water within Foster City, or 80.9% of its total area. It is 41.4 percentage points higher 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, Foster City city has 31.3% of the land area of nearby San Mateo city (12.1 square miles). These areas describe boundaries, not comparable property prices.

