San Mateo County

Foster City, CA Business Index

Foster City is a city in San Mateo County with an estimated 32,411 residents as of 2025, down 3.9% since 2020. Foster City's business base is indexed below across 48 owner-operated industries.

Population (2025)
32,411
U.S. Census Bureau estimate
Change since 2020
-3.9%
2020–2025
Land area
3.8 sq mi
2023 Census Gazetteer
Density
8,558/sq mi
Residents per square mile

Population trend

Annual resident population estimates, U.S. Census Bureau Population Estimates Program.

YearPopulationYear over year
202033,737n/a
202132,751-2.92%
202232,448-0.93%
202332,430-0.06%
202432,516+0.27%
202532,411-0.32%

Foster City holds 4.4% of San Mateo County’s 743,568 residents.

Industries in San Mateo County

Foster City businesses compete in the San Mateo County market. Establishment counts, employment and payroll below are reported at county level by the U.S. Census Bureau.

HVAC & PlumbingViewElectricalViewRoofingViewLandscapingViewPest ControlViewPool ServiceViewCommercial CleaningViewFlooringViewGlass & GlazingViewSeptic & WellViewAuto RepairViewAuto BodyViewCar WashViewTowingViewTruckingViewEquipment RentalViewDentalViewVeterinaryViewHome HealthViewPharmacyViewMedical PracticeViewOptometryViewAccountingViewInsurance AgencyViewIT & MSPViewStaffingViewEngineeringViewArchitectureViewLaw FirmViewSecurity ServicesViewPrintingViewSign ShopsViewMachine ShopsViewMetal FabricationViewPlasticsViewFood ManufacturingViewMillworkViewRestaurantsViewBakeriesViewLiquor StoresViewGyms & FitnessViewSalons & SpasViewLaundromatsViewDry CleaningViewFuneral HomesViewSelf StorageViewChildcareViewPet ServicesView

Nearby cities

Other indexed places in San Mateo County and the surrounding area.

San Mateo103,337Daly City101,261Redwood City82,178South San Francisco64,941San Bruno42,305Pacifica36,890Menlo Park32,713Burlingame31,929San Carlos29,261
Data last refreshed from source on 2026-09-08.

Sources

  1. U.S. Census Bureau, Population Estimates Program (Vintage 2025). Subcounty resident population estimates. Retrieved 2026-09-08.
  2. U.S. Census Bureau, 2023 Gazetteer Files. Land area and internal point coordinates. Retrieved 2026-09-08.
  3. U.S. Census Bureau, ANSI/FIPS Place-to-County Relationship File Retrieved 2026-09-08.