Foster City, California

Foster City population, 2020 to 2024

Foster City lost 1,080 residents from July 2020 to July 2024, a change of -3.2%. In the latest year it moved by +215. Among 429 California places of 5,000 or more, that growth ranks 341st; the median place changed by -1.1%. The median place of 5,000+ in California has 37,056 people, so Foster City is 88% of it.

Foster City covers 3.79 square miles of land and 16.05 of water, for 8,617 people per square mile of land. The median California place of 5,000+ has 3,725, so Foster City is denser than the typical town.

What county Foster City is in

All of Foster City's residents live in San Mateo County, which had 742,893 residents in 2024. Foster City holds 4.4% of the county's population. The shaded shape is on the map above; dots mark the eight nearest places.

ZIP codes in Foster City

1 ZIP Code Tabulation Area (ZCTA) overlaps Foster City by at least 10% of the ZCTA's or the city's land: 94404. ZCTAs are Census approximations of USPS ZIP code delivery areas. The list comes from the 2020 ZCTA to place relationship file, so a city that annexed land after 2020 may reach into ZIP codes not listed here.

Where Foster City is

The Census internal point of Foster City is at 37.564800, -122.250800. Sacramento, the capital, is 81.2 miles NNE in a straight line. The nearest larger place is San Mateo, CA (103,006 people), 3.3 miles away.

Daylight in Foster City

At 37.56° N, Foster City gets about 14 h 46 min of daylight around the June solstice and 9 h 34 min around the December solstice, a swing of 5 h 12 min. Figures are sunrise to sunset from the SunCalc model for June 21 and December 21, 2026.

Places near Foster City

The eight nearest incorporated places of 1,000+ in California, measured between internal points. The closest is San Mateo, 3.3 miles away, with 103,006 people.