Irwin borough, Pennsylvania
Official LSAD Designation: Irwin borough • Census GEOID: 4237208
• Westmoreland County
Demographics & Population Profile
Population and demographics for Irwin borough.
| Demographic Variable | Estimate / Count | Margin of Error | Period | Source |
|---|---|---|---|---|
| Total Population (2025 PEP Estimate) | 3,759 | — | 2025 | Census |
| Median Age | 38.1 yrs | ±3.8 | 2020-2024 | Census ACS 5-Year 2024 |
| Total Households | 1,970 | ±241 | 2020-2024 | Census ACS 5-Year 2024 |
Source: U.S. Census Bureau (PEP, ACS 5-Year).