| Rank |
County |
Population Density |
| 1 |
Philadelphia County, Pennsylvania
|
11,379.5
|
| 2 |
Delaware County, Pennsylvania
|
3,040.5
|
| 3 |
Allegheny County, Pennsylvania
|
1,675.6
|
| 4 |
Montgomery County, Pennsylvania
|
1,655.9
|
| 5 |
Bucks County, Pennsylvania
|
1,034.7
|
| 6 |
Lehigh County, Pennsylvania
|
1,012.5
|
| 7 |
Northampton County, Pennsylvania
|
805.4
|
| 8 |
Chester County, Pennsylvania
|
664.7
|
| 9 |
Lancaster County, Pennsylvania
|
550.4
|
| 10 |
Dauphin County, Pennsylvania
|
510.6
|
| 11 |
York County, Pennsylvania
|
481.1
|
| 12 |
Berks County, Pennsylvania
|
480.4
|
| 13 |
Lackawanna County, Pennsylvania
|
467.1
|
| 14 |
Cumberland County, Pennsylvania
|
431.6
|
| 15 |
Beaver County, Pennsylvania
|
392.3
|
| 16 |
Lebanon County, Pennsylvania
|
369.1
|
| 17 |
Luzerne County, Pennsylvania
|
360.4
|
| 18 |
Westmoreland County, Pennsylvania
|
355.4
|
| 19 |
Erie County, Pennsylvania
|
351.1
|
| 20 |
Monroe County, Pennsylvania
|
279.2
|
| 21 |
Lawrence County, Pennsylvania
|
254.4
|
| 22 |
Washington County, Pennsylvania
|
242.5
|
| 23 |
Blair County, Pennsylvania
|
241.7
|
| 24 |
Butler County, Pennsylvania
|
233.1
|
| 25 |
Cambria County, Pennsylvania
|
208.7
|
| 26 |
Northumberland County, Pennsylvania
|
206.2
|
| 27 |
Adams County, Pennsylvania
|
195.5
|
| 28 |
Franklin County, Pennsylvania
|
193.7
|
| 29 |
Schuylkill County, Pennsylvania
|
190.4
|
| 30 |
Mercer County, Pennsylvania
|
173.4
|
| 31 |
Fayette County, Pennsylvania
|
172.8
|
| 32 |
Carbon County, Pennsylvania
|
171.1
|
| 33 |
Union County, Pennsylvania
|
142.2
|
| 34 |
Montour County, Pennsylvania
|
140.3
|
| 35 |
Columbia County, Pennsylvania
|
139.3
|
| 36 |
Centre County, Pennsylvania
|
138.7
|
| 37 |
Snyder County, Pennsylvania
|
120.8
|
| 38 |
Mifflin County, Pennsylvania
|
113.6
|
| 39 |
Indiana County, Pennsylvania
|
107.5
|
| 40 |
Armstrong County, Pennsylvania
|
105.5
|
| 41 |
Pike County, Pennsylvania
|
105.3
|
| 42 |
Lycoming County, Pennsylvania
|
94.5
|
| 43 |
Crawford County, Pennsylvania
|
87.7
|
| 44 |
Perry County, Pennsylvania
|
83.4
|
| 45 |
Venango County, Pennsylvania
|
81.5
|
| 46 |
Wayne County, Pennsylvania
|
72.8
|
| 47 |
Somerset County, Pennsylvania
|
72.4
|
| 48 |
Clearfield County, Pennsylvania
|
71.3
|
| 49 |
Wyoming County, Pennsylvania
|
71.2
|
| 50 |
Jefferson County, Pennsylvania
|
69.3
|
| 51 |
Greene County, Pennsylvania
|
67.2
|
| 52 |
Clarion County, Pennsylvania
|
66.6
|
| 53 |
Juniata County, Pennsylvania
|
63
|
| 54 |
Bradford County, Pennsylvania
|
54.6
|
| 55 |
Susquehanna County, Pennsylvania
|
52.7
|
| 56 |
Huntingdon County, Pennsylvania
|
52.5
|
| 57 |
Bedford County, Pennsylvania
|
49.2
|
| 58 |
Warren County, Pennsylvania
|
47.3
|
| 59 |
McKean County, Pennsylvania
|
44.4
|
| 60 |
Clinton County, Pennsylvania
|
44.2
|
| 61 |
Elk County, Pennsylvania
|
38.6
|
| 62 |
Tioga County, Pennsylvania
|
37
|
| 63 |
Fulton County, Pennsylvania
|
33.9
|
| 64 |
Forest County, Pennsylvania
|
18.1
|
| 65 |
Potter County, Pennsylvania
|
16.1
|
| 66 |
Sullivan County, Pennsylvania
|
14.3
|
| 67 |
Cameron County, Pennsylvania
|
12.8
|