West Mifflin borough, Pennsylvania
Official LSAD Designation: West Mifflin borough • Census GEOID: 4283512
• Allegheny County
Demographics & Population Profile
Population and demographics for West Mifflin borough.
| Demographic Variable | Estimate / Count | Margin of Error | Period | Source |
|---|---|---|---|---|
| Total Population (2025 PEP Estimate) | 18,707 | — | 2025 | Census |
| Median Age | 43.4 yrs | ±2.7 | 2020-2024 | Census ACS 5-Year 2024 |
| Total Households | 8,286 | ±536 | 2020-2024 | Census ACS 5-Year 2024 |
Source: U.S. Census Bureau (PEP, ACS 5-Year).