Clayton city, Missouri
Official LSAD Designation: Clayton city • Census GEOID: 2914572
• St. Louis County
Demographics & Population Profile
Population and demographics for Clayton city.
| Demographic Variable | Estimate / Count | Margin of Error | Period | Source |
|---|---|---|---|---|
| Total Population (2025 PEP Estimate) | 17,807 | — | 2025 | Census |
| Median Age | 30 yrs | ±1.5 | 2020-2024 | Census ACS 5-Year 2024 |
| Total Households | 6,222 | ±270 | 2020-2024 | Census ACS 5-Year 2024 |
Source: U.S. Census Bureau (PEP, ACS 5-Year).