St. Marys city, Kansas
Official LSAD Designation: St. Marys city • Census GEOID: 2062400
• Pottawatomie County
Demographics & Population Profile
Population and demographics for St. Marys city.
| Demographic Variable | Estimate / Count | Margin of Error | Period | Source |
|---|---|---|---|---|
| Total Population (2025 PEP Estimate) | 2,790 | — | 2025 | Census |
| Median Age | 26.6 yrs | ±4.1 | 2020-2024 | Census ACS 5-Year 2024 |
| Total Households | 905 | ±133 | 2020-2024 | Census ACS 5-Year 2024 |
Source: U.S. Census Bureau (PEP, ACS 5-Year).