ZIP code · Union City · California · United States
ZIP code 94587 — Union City
ZIP code 94587 serves Union City, California.
- Postal code
- 94587Single source Value from one source, not cross-checked.
- City
- Union City
- County
- Alameda FIPS 06001
- State
- California
- Country
- United States
- Coordinates
- 37.5895, -122.0497 — precision precise (locality)
View on OpenStreetMap - Population
- 68,141 (ZCTA, ACS 5-year)
- Population density
- 3,471 / sq mi
- Land area
- 19.6 sq mi (50.8 km²) (ZCTA, ACS 5-year)
- Median household income
- $137,194
- Per-capita income
- $56,020
- Median age
- 42.1
- Households
- 21,202
- Housing units
- 21,923
- Median home value
- $1,058,200
- Median gross rent
- $2,713 / month
- Congressional district
- CA-14 (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
- 831 (from the nearest rate centre)Telephone 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 94587 with another ZIP · ZIPs within 25 miles · distance from 94587
Map of ZIP code 94587
Climate — monthly normals
Warmest month Sep (avg high 78°F), coldest Dec (avg low 43°F).
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high °F | 59 | 61 | 65 | 68 | 71 | 75 | 78 | 78 | 78 | 73 | 65 | 58 |
| Avg low °F | 43 | 44 | 46 | 48 | 52 | 55 | 57 | 57 | 56 | 52 | 46 | 43 |
| Precip in | 3.0 | 3.2 | 2.5 | 1.2 | 0.5 | 0.2 | 0.0 | 0.0 | 0.1 | 0.7 | 1.6 | 3.0 |
NOAA 1991–2020 climate normals from the nearest station: FREMONT (3.7 mi) · NOAA NCEI
Places in ZIP 94587
- 14 schools
- 1 hospitals & clinics
- 23 doctors & dentists
- 2 pharmacies
- 13 supermarkets
- 118 restaurants & cafés
- 2 bars & pubs
- 34 parks
- 57 playgrounds
- 9 gyms & sports centres
- 3 libraries
- 6 post offices
- 9 places of worship
- 11 banks
- 11 gas stations
- 5 EV charging stations
- 7 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