Census place · GEOID 0681204 · Alameda County
Union City, CA ZIP codes
4 ZIP/ZCTAs intersecting this Census place in Alameda County.
U.S. Census Bureau, ACS 2019–2023 5-year (vintage 2023). Geography: Census place Union City (GEOID 0681204). Methodology
Combined population of ZIP/ZCTAs intersecting this place: 173,968 (4 ZIPs).
Combined population of ZIP/ZCTAs intersecting this place. Each intersecting ZIP contributes its full ZCTA population; overlap percents are descriptive only. This is not the Census place ACS headline above. Methodology
Map of Union City, CA
ZIP/ZCTA overlap with Union City
Population overlap
Share of each ZIP/ZCTA’s population located within Union City, based on ZIP Code Database place-overlap data. This is a population measure, not land-area overlap or the Census-place population.
ZIP Code Database place-overlap table, field percent_of_zip_population_in_place, keyed by place_geoid. Not ACS 2019–2023. Overlap vintage is the shipped overlap table and is separate from ACS. Methodology
ZIP codes intersecting Union City
| ZIP | City | County | Population | Income |
|---|---|---|---|---|
| 94542 | Hayward | Alameda County | 14,729 | $131,989 |
| 94544 | Hayward | Alameda County | 76,739 | $108,358 |
| 94552 | Castro Valley | Alameda County | 14,359 | $205,170 |
| 94587 | Union City | Alameda County | 68,141 | $137,194 |