ZIP code · San Mateo · California · United States
ZIP code 94402 — San Mateo
ZIP code 94402 serves San Mateo, California.
- Postal code
- 94402Single source Value from one source, not cross-checked.
- City
- San Mateo
- County
- San Mateo FIPS 06081
- State
- California
- Country
- United States
- Coordinates
- 37.5507, -122.3276 — precision precise (locality)
View on OpenStreetMap - Population
- 25,498 (ZCTA, ACS 5-year)
- Population density
- 5,045 / sq mi
- Land area
- 5.1 sq mi (13.1 km²) (ZCTA, ACS 5-year)
- Median household income
- $179,683
- Per-capita income
- $102,536
- Median age
- 40.6
- Households
- 9,944
- Housing units
- 10,623
- Median home value
- $2,000,000+
- Median gross rent
- $3,476 / month
- Congressional districts
- CA-15 (also CA-16) (119th Congress)
- USDA hardiness zone
- 10a (30 to 35 °F)Planting / growing zone from the 2023 USDA Plant Hardiness Zone Map: average annual extreme minimum temperature, 1991–2020.
- Time zone
- America/Los_Angeles (UTC−8 / UTC−7 DST)
- Area code
- 650Telephone area codes serving this ZIP (NANPA central-office assignments). A ZIP and an area code are different boundaries; at a border both codes may apply.
Tools: compare 94402 with another ZIP · ZIPs within 25 miles · distance from 94402
Map of ZIP code 94402
Climate — monthly normals
Warmest month Sep (avg high 75°F), coldest Jan (avg low 45°F).
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high °F | 58 | 61 | 63 | 66 | 68 | 72 | 73 | 73 | 75 | 72 | 64 | 58 |
| Avg low °F | 45 | 46 | 48 | 49 | 52 | 54 | 55 | 56 | 56 | 53 | 49 | 45 |
| Precip in | 3.9 | 4.0 | 2.7 | 1.4 | 0.5 | 0.1 | 0.0 | 0.0 | 0.1 | 0.8 | 2.0 | 4.1 |
NOAA 1991–2020 climate normals from the nearest station: SAN FRANCISCO INTL AP (5.2 mi) · NOAA NCEI
Places in ZIP 94402
- 15 schools
- 1 colleges & universities
- 1 hospitals & clinics
- 3 pharmacies
- 4 supermarkets
- 20 restaurants & cafés
- 1 bars & pubs
- 10 parks
- 7 playgrounds
- 6 gyms & sports centres
- 1 libraries
- 2 post offices
- 4 places of worship
- 5 banks
- 5 gas stations
- 4 EV charging stations
- 3 police & fire stations
Places mapped inside this ZIP’s ZCTA area in OpenStreetMap. OSM is community-maintained: counts reflect what has been mapped, and completeness varies by area — treat them as at-least figures. © OpenStreetMap contributors (ODbL) · Methodology
About this page
US ZIP codes have five digits. They are postal routing areas, not administrative boundaries: a ZIP can span more than one city or county, and the city shown is the primary USPS name for that code.
GeoNames · U.S. Census Bureau (ACS) · U.S. Census Bureau · NOAA NCEI · usda-phzm. Data generated on 2026-08-21. Methodology · Report an error on this page