Foster City is a city in San Mateo County, California, home to about 32,792 people across 3.8 square miles. Its ZIP code is 94404.
Homes sold for a median of $916 per square foot in the three months ending August 2026, a seller’s market.
Mostly Foster City; also San Mateo
Each card is that ZIP code’s whole market, including any part outside Foster City. Seller’s market: under 4 months of supply; buyer’s market: over 6. Methodology
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| Nearest major airport | San Francisco International Airport (SFO)7 miles away |
|---|---|
| Nearest city of 250,000+ | Oakland, CA15 miles away |
| Nearest city of 1 million+ | Los Angeles, CA326 miles away |
Straight-line distances from the center of Foster City; driving is longer.
Source: Airports from OurAirports (scheduled passenger service); city centers and populations from the U.S. Census Bureau.
Source: Members of Congress from the congress-legislators project; districts from the Census Bureau’s relationship files; governor and mayor from Wikidata.
Foster City had 33,805 residents in the 2020 census, up 17% since 2000.
It’s the 248th largest of 1,563 towns in California by population.
San Mateo County grew from 12,094 residents in 1900 to 764,442 in 2020.
San Mateo County, 1900–2020
Source: U.S. Census Bureau decennial censuses (counties 1900–1990 from the Bureau’s historical county file).
Average highs peak around 81°F in summer, and winter lows average 40°F. About 19.2 inches of rain and melted snow fall in a typical year.
Source: NOAA 1991–2020 climate normals, Redwood City, CA weather station (6 miles away).
477,938 jobs at 21,569 businesses in San Mateo County. The biggest industries by employees:
Source: U.S. Census Bureau County Business Patterns 2023 (private employers; jobs counted where people work).
230 doctors and other health care providers list an office in Foster City.
Nearest hospitals
Providers with an office here
| Primary care doctors | 16 |
|---|---|
| Specialist doctors | 16 |
| Dentists | 58 |
| Nurse practitioners and physician assistants | 26 |
| Mental health providers | 66 |
| Physical and occupational therapists | 32 |
| Optometrists | 5 |
| Chiropractors | 11 |
| Pharmacies | 6 |
Source: Hospitals from CMS Hospital General Information (ratings are CMS overall star ratings); straight-line distances; providers from the CMS National Plan and Provider Enumeration System (NPPES), by practice address and primary specialty.
Parks (36 nearby)
Grocery stores (8 nearby)
Pharmacies (1 nearby)
Libraries (3 nearby)
Museums
Theaters and performance venues (1 nearby)
Counts are within about 1.5 miles of the center of town.
Source: Map data © OpenStreetMap contributors (openstreetmap.org/copyright), as mapped by volunteers; it can miss places or include closed ones.
Established in 1971.
Source: Wikidata (wikidata.org), the free knowledge base; people are listed by place of birth.
Public schools here are run by San Mateo-Foster City. Check each district’s attendance zones for a specific address.
| School | Grades | Students | Type | Distance |
|---|---|---|---|---|
| Audubon ElementaryFoster City | K–5 | 445 | Public | 1.2 mi |
| Beach Park ElementaryFoster City | K–5 | 347 | Public | 0.4 mi |
| Brewer Island ElementaryFoster City | K–5 | 306 | Public | 0.7 mi |
| Foster City ElementaryFoster City | K–5 | 624 | Public | 0.6 mi |
| San Mateo-Foster City Special Education PreschoolFoster City | K | 1 | Public | 0.9 mi |
| Bowditch MiddleFoster City | 6–8 | 929 | Public | 1.2 mi |
| School | Grades | Students | Affiliation | Distance |
|---|---|---|---|---|
| Ronald C Wornick Jewish Day SchoolFoster City | TK–8 | 199 | Jewish | 0.3 mi |
| Kids Connection ElementaryFoster City | K–5 | 188 | Nonsectarian | 1.1 mi |
Source: U.S. Department of Education, NCES: Common Core of Data (2024-2025) for public schools; Private School Universe Survey (2023-2024) for private schools. Listed by address; we don’t rate schools.
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Shares ZIP codes with San Mateo.
Town boundaries don’t always match ZIP codes: a ZIP code can cross into neighboring towns, and a town can share a ZIP code with its neighbors. Facts describe the town itself; market figures describe whole ZIP codes.