St. Marys city, Pennsylvania
Official LSAD Designation: St. Marys city • Census GEOID: 4267344
• Elk 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) | 12,253 | — | 2025 | Census |
| Median Age | 51.6 yrs | ±1.9 | 2020-2024 | Census ACS 5-Year 2024 |
| Total Households | 5,692 | ±238 | 2020-2024 | Census ACS 5-Year 2024 |
Source: U.S. Census Bureau (PEP, ACS 5-Year).