Eureka city, Missouri
Official LSAD Designation: Eureka city • Census GEOID: 2922834
• Jefferson County / St. Louis County
Demographics & Population Profile
Population and demographics for Eureka city.
| Demographic Variable | Estimate / Count | Margin of Error | Period | Source |
|---|---|---|---|---|
| Total Population (2025 PEP Estimate) | 13,422 | — | 2025 | Census |
| Median Age | 37.5 yrs | ±2.4 | 2020-2024 | Census ACS 5-Year 2024 |
| Total Households | 4,690 | ±301 | 2020-2024 | Census ACS 5-Year 2024 |
Source: U.S. Census Bureau (PEP, ACS 5-Year).