Union City, CA ZIP code
The ZIP code for Union City, California is 94587. It is in Alameda County.
- Population in these ZIPs
- 67,464
- Avg. median income
- $133,700population-weighted
- Typical home value
- $1,196,400population-weighted
- Metro area
- San Francisco-Oakland-Fremont, CA
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Union City, CA ZIP code list
| ZIP code | Population | Median income | Typical home value |
|---|---|---|---|
| 94587 | 67,464 | $133,715 | $1,196,400 |
Population and median household income: ACS 2020–2024 5-year estimates. Typical home value: Zillow Home Value Index (September 2026) where available, otherwise the ACS median owner-reported value. "PO Box" marks ZIP codes with no delivery area of their own. Methodology
Cities near Union City
- Hayward 5 mi
- Fremont 6 mi
- Newark 6 mi
- San Lorenzo 7 mi
- San Leandro 9 mi
- Castro Valley 9 mi
- Alviso 11 mi
- Palo Alto 11 mi
- Atherton 11 mi
- Sunol 12 mi
- San Carlos 13 mi
- Dublin 13 mi
Frequently asked questions
What is the ZIP code for Union City, CA?
The ZIP code for Union City, CA is 94587.
What county is Union City, California in?
Union City ZIP codes are in Alameda County.