ZIP code · Castro Valley · California · United States
ZIP code 94552 — Castro Valley
ZIP code 94552 serves Castro Valley, California.
- Postal code
- 94552Single source Value from one source, not cross-checked.
- City
- Castro Valley
- County
- Alameda FIPS 06001
- State
- California
- Country
- United States
- Coordinates
- 37.7131, -122.0381 — precision precise (locality)
View on OpenStreetMap - Population
- 14,359 (ZCTA, ACS 5-year)
- Population density
- 277 / sq mi
- Land area
- 51.8 sq mi (134.2 km²) (ZCTA, ACS 5-year)
- Median household income
- $205,170
- Per-capita income
- $76,854
- Median age
- 48.6
- Households
- 5,016
- Housing units
- 5,079
- Median home value
- $1,286,300
- Median gross rent
- $2,925 / month
- Congressional district
- CA-14 (119th Congress)
- USDA hardiness zone
- 9b (25 to 30 °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
- 831Telephone 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 94552 with another ZIP · ZIPs within 25 miles · distance from 94552
Map of ZIP code 94552
Climate — monthly normals
Warmest month Sep (avg high 77°F), coldest Dec (avg low 43°F).
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high °F | 59 | 62 | 64 | 67 | 69 | 74 | 75 | 76 | 77 | 74 | 65 | 59 |
| Avg low °F | 43 | 45 | 47 | 50 | 52 | 55 | 57 | 58 | 58 | 54 | 47 | 43 |
| Precip in | 2.9 | 3.1 | 2.4 | 1.2 | 0.6 | 0.1 | 0.0 | 0.1 | 0.1 | 0.8 | 1.5 | 3.2 |
NOAA 1991–2020 climate normals from the nearest station: HAYWARD AIR TERMINAL (5.8 mi) · NOAA NCEI
Places in ZIP 94552
- 4 schools
- 1 supermarkets
- 1 restaurants & cafés
- 4 parks
- 8 playgrounds
- 1 gyms & sports centres
- 1 places of worship
- 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