St. Mary city, Missouri
Official LSAD Designation: St. Mary city • Census GEOID: 2965034
• Ste. Genevieve County
Demographics & Population Profile
Population and demographics for St. Mary city.
| Demographic Variable | Estimate / Count | Margin of Error | Period | Source |
|---|---|---|---|---|
| Total Population (2025 PEP Estimate) | 312 | — | 2025 | Census |
| Median Age | 48.9 yrs | ±17.4 | 2020-2024 | Census ACS 5-Year 2024 |
| Total Households | 108 | ±33 | 2020-2024 | Census ACS 5-Year 2024 |
Source: U.S. Census Bureau (PEP, ACS 5-Year).