Northumberland borough, Pennsylvania
Official LSAD Designation: Northumberland borough • Census GEOID: 4255456
• Northumberland County
Demographics & Population Profile
Population and demographics for Northumberland borough.
| Demographic Variable | Estimate / Count | Margin of Error | Period | Source |
|---|---|---|---|---|
| Total Population (2025 PEP Estimate) | 3,800 | — | 2025 | Census |
| Median Age | 41 yrs | ±3.4 | 2020-2024 | Census ACS 5-Year 2024 |
| Total Households | 1,726 | ±87 | 2020-2024 | Census ACS 5-Year 2024 |
Source: U.S. Census Bureau (PEP, ACS 5-Year).