Monongahela city, Pennsylvania
Official LSAD Designation: Monongahela city • Census GEOID: 4250408
• Washington County
Demographics & Population Profile
Population and demographics for Monongahela city.
| Demographic Variable | Estimate / Count | Margin of Error | Period | Source |
|---|---|---|---|---|
| Total Population (2025 PEP Estimate) | 4,041 | — | 2025 | Census |
| Median Age | 43 yrs | ±5.2 | 2020-2024 | Census ACS 5-Year 2024 |
| Total Households | 1,931 | ±171 | 2020-2024 | Census ACS 5-Year 2024 |
Source: U.S. Census Bureau (PEP, ACS 5-Year).