# Counties in Pennsylvania by population density, 2025

All 67 values come from U.S. Census Bureau for 2025, so the places are comparable.

- Indicator id: `population_density`
- Unit: inhabitants per km²
- Definition: Resident population divided by land area in km². World Bank figures use mid-year population and land area excluding inland water.
- Source: U.S. Census Bureau, Population Estimates Program resident population on 1 July divided by land area from the latest Census Gazetteer files, persons per km² (https://www2.census.gov/programs-surveys/popest/datasets/2020-2025/)
- Retrieved: 2026-10-09
- Citation: U.S. Census Bureau. Population Estimates Program resident population on 1 July divided by land area from the latest Census Gazetteer files, persons per km². https://www2.census.gov/programs-surveys/popest/datasets/2020-2025/. Retrieved 2026-10-09.
- Web page: https://invokely.ai/rankings/population-density/pennsylvania-counties
- CSV: https://invokely.ai/download/rankings/population-density/pennsylvania-counties.csv

| Rank | Place | inhabitants per km² |
|---:|---|---:|
| 1 | Philadelphia County | 4,525.1 |
| 2 | Delaware County | 1,220.3 |
| 3 | Montgomery County | 701.7 |
| 4 | Allegheny County | 648 |
| 5 | Lehigh County | 429.8 |
| 6 | Bucks County | 413.8 |
| 7 | Northampton County | 338.7 |
| 8 | Chester County | 286.6 |
| 9 | Lancaster County | 230.4 |
| 10 | Dauphin County | 215.8 |
| 11 | York County | 202 |
| 12 | Berks County | 198.4 |
| 13 | Cumberland County | 196.3 |
| 14 | Lackawanna County | 182.2 |
| 15 | Lebanon County | 156.2 |
| 16 | Beaver County | 147.5 |
| 17 | Luzerne County | 144.1 |
| 18 | Westmoreland County | 131.2 |
| 19 | Erie County | 128.5 |
| 20 | Monroe County | 106.1 |
| 21 | Butler County | 97.9 |
| 22 | Washington County | 95 |
| 23 | Lawrence County | 90.7 |
| 24 | Blair County | 87.9 |
| 25 | Franklin County | 80.3 |
| 26 | Adams County | 80.1 |
| 27 | Northumberland County | 75.9 |
| 28 | Cambria County | 72.4 |
| 29 | Schuylkill County | 71.9 |
| 30 | Carbon County | 66.7 |
| 31 | Mercer County | 61.9 |
| 32 | Fayette County | 60.1 |
| 33 | Centre County | 54.9 |
| 34 | Montour County | 52.9 |
| 35 | Columbia County | 52.9 |
| 36 | Union County | 51.7 |
| 37 | Snyder County | 46.6 |
| 38 | Pike County | 44.5 |
| 39 | Mifflin County | 43.3 |
| 40 | Indiana County | 38.7 |
| 41 | Armstrong County | 37.6 |
| 42 | Lycoming County | 35.4 |
| 43 | Perry County | 32.8 |
| 44 | Crawford County | 31.2 |
| 45 | Venango County | 28.3 |
| 46 | Wayne County | 27.5 |
| 47 | Clearfield County | 26.3 |
| 48 | Somerset County | 25.9 |
| 49 | Jefferson County | 25.6 |
| 50 | Wyoming County | 25.1 |
| 51 | Clarion County | 23.6 |
| 52 | Juniata County | 23.1 |
| 53 | Greene County | 22.7 |
| 54 | Bradford County | 20.1 |
| 55 | Huntingdon County | 19 |
| 56 | Bedford County | 18.1 |
| 57 | Susquehanna County | 17.9 |
| 58 | Clinton County | 16.4 |
| 59 | Warren County | 16.2 |
| 60 | McKean County | 15.4 |
| 61 | Elk County | 14 |
| 62 | Tioga County | 13.8 |
| 63 | Fulton County | 12.8 |
| 64 | Forest County | 6 |
| 65 | Potter County | 5.7 |
| 66 | Sullivan County | 5 |
| 67 | Cameron County | 4.1 |