Where is Foster City, California, U.S.

Written and Fact-checked by | Updated On: March 05, 2026, 14:55 ET

Where is Foster City, California Located in the United States? - Foster City is a city located in theSan Mateo County in California, United States. Foster City lies between 37.5585 Degrees North latitudes and -122.2711 Degrees West longitudes.

Location Map of Foster City,San Mateo, California

Where is Foster City Located inSan Mateo, California

About Map: The map shows the location of Foster City inSan Mateo County, in the U.S. state of California.

Foster City Map, California, USA

About Foster City Map: This Google Map provides a detailed view with zoom, satellite, and street options to explore the area and its surroundings.

About Foster City, San Mateo County, California

Foster City is located in San Mateo County in the U.S. state of California, United States. It lies in the northern part of the state in the state of the United States within the San Francisco Peninsula region of the San Francisco Bay Area. The city was incorporated in 1971 and was named after developer T. Jack Foster, who planned and built the community on reclaimed land along the San Francisco Bay, and it developed as a planned residential and business city.

Population

According to the United States Census Bureau, the population of Foster City is 33,805 as recorded in the 2020 Census, and the population density is approximately 8,400 people per square mile.

Area and Geography

According to the United States Census Bureau, Foster City covers a total area of approximately 19.8 square miles (about 51.3 square kilometers), including about 3.8 square miles (9.8 square kilometers) of land and 16.0 square miles (41.5 square kilometers) of water.

Location and Surroundings

Foster City is situated east of San Mateo and west of the San Francisco Bay, positioned on a series of artificial islands and lagoons along the bay shoreline. The city features waterfront neighborhoods, canals, and landscaped parks that define its planned design. State Route 92 runs through the city, providing a major transportation route connecting Foster City to surrounding communities across the San Francisco Peninsula and East Bay.

Attractions and Recreation

Foster City offers waterfront parks, recreational trails, and community facilities that support outdoor activities and local tourism. Popular destinations include Leo J. Ryan Park, the Foster City Lagoon system, and the Bay Trail along the shoreline. The city hosts community festivals, sailing events, and outdoor recreation programs throughout the year.

Transportation

Foster City is served by State Route 92 and nearby U.S. Route 101, offering convenient highway access throughout San Mateo County and the San Francisco Bay Area. Public transportation includes regional bus services connecting the city to surrounding communities and nearby rail stations. The nearest major airport is San Francisco International Airport, located approximately 10 miles to the north.

Explore more cities in California or visit the United States Map section to learn more about the country’s geography.

Sources:

Population and area data sourced from the United States Census Bureau (2020 Census). General city information referenced from the Official Foster City Website.

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  • Foster City City Facts

    CityFoster City
    StateCalifornia
    CountySan Mateo County
    CountryUnited States
    RegionSan Francisco Bay Area - Peninsula
    IncorporatedApril 27, 1971
    Founded1960s planned community
    Total AreaApproximately 19.8 sq mi (51.3 km2)
    Land AreaApproximately 3.8 sq mi (9.8 km2)
    Water AreaApproximately 16.0 sq mi (41.5 km2)
    ElevationApproximately 10 ft (3 m)
    Population (2023 estimate)Approximately 33,000+
    Population (2020 Census)33,805
    Population DensityApproximately 8,900 people per sq mi
    Time ZonePacific Time (UTC-8 / UTC-7 DST)
    ZIP Codes94404
    Area Code650
    Major HighwaysU.S. Route 101, State Route 92
    Public TransitSamTrans Bus
    Major AttractionsLeo J. Ryan Memorial Park, Foster City Lagoon, Bay Trail
    Official Websitehttps://www.fostercity.org/

    Distance from Foster City City, CA to Nearby Cities

    • San Mateo, CA – 3 miles (5 km)
    • Belmont, CA – 4 miles (6 km)
    • San Carlos, CA – 5 miles (8 km)
    • Redwood City, CA – 6 miles (10 km)
    • Burlingame, CA – 7 miles (11 km)
    • Millbrae, CA – 9 miles (14 km)
    • San Bruno, CA – 11 miles (18 km)
    • Half Moon Bay, CA – 16 miles (26 km)
    • Menlo Park, CA – 12 miles (19 km)
    • Palo Alto, CA – 15 miles (24 km)
    • Mountain View, CA – 20 miles (32 km)
    • Sunnyvale, CA – 22 miles (35 km)
    • Santa Clara, CA – 28 miles (45 km)
    • San Jose, CA – 30 miles (48 km)
    • Daly City, CA – 15 miles (24 km)
    • San Francisco, CA – 20 miles (32 km)
    • Oakland, CA – 25 miles (40 km)
    • Berkeley, CA – 28 miles (45 km)
    • Hayward, CA – 25 miles (40 km)
    • Fremont, CA – 30 miles (48 km)

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