Union City city, California
Official LSAD Designation: Union City city • Census GEOID: 0681204
• Alameda County
Demographics & Population Profile
Population and demographics for Union City city.
| Demographic Variable | Estimate / Count | Margin of Error | Period | Source |
|---|---|---|---|---|
| Total Population (2025 PEP Estimate) | 65,282 | — | 2025 | Census |
| Median Age | 43 yrs | ±0.9 | 2020-2024 | Census ACS 5-Year 2024 |
| Total Households | 21,240 | ±521 | 2020-2024 | Census ACS 5-Year 2024 |
Source: U.S. Census Bureau (PEP, ACS 5-Year).