Ranking of Pennsylvania Counties By Population in 2013

Updated on June 21, 2025.

Based on the US Census Vintage data estimates, in 2013, the Population for Pennsylvania was 12.78M. Among all Pennsylvania counties, Philadelphia County had the highest population (1.56M), followed by Allegheny County (1.23M), and Montgomery County (812.75K).

The chart below shows the top 10 counties, and the table below shows the ranking of all Pennsylvania counties.

You can see similar ranking information for related topics, and for other states. You can also see the ranking of all counties in the United States.

See this for other years:
Ranking of Pennsylvania Counties By Population in 2013
Philadelphia
Allegheny
Montgomery
Bucks
Delaware
Lancaster
Chester
York
Berks
Westmoreland
Ranking of Pennsylvania Counties By Population in 2013
Items per page:
0 of 0
Rank County Population
1 Philadelphia County 1558713
2 Allegheny County 1233999
3 Montgomery County 812750
4 Bucks County 625325
5 Delaware County 561635
6 Lancaster County 530109
7 Chester County 509101
8 York County 439041
9 Berks County 413975
10 Westmoreland County 360720
11 Lehigh County 355273
12 Luzerne County 319737
13 Northampton County 299066
14 Erie County 280905
15 Dauphin County 271500
16 Cumberland County 241153
17 Lackawanna County 213797
18 Washington County 208117
19 Butler County 185185
20 Beaver County 169770
21 Monroe County 167435
22 Centre County 158342
23 Franklin County 152005
24 Schuylkill County 146674
25 Cambria County 138858
26 Lebanon County 135803
27 Fayette County 134610
28 Blair County 125869
29 Lycoming County 116626
30 Mercer County 115162
31 Adams County 101156
32 Northumberland County 93884
33 Lawrence County 89274
34 Indiana County 88178
35 Crawford County 87532
36 Clearfield County 81444
37 Somerset County 76607
38 Armstrong County 68015
39 Columbia County 67203
40 Carbon County 64545
41 Bradford County 62519
42 Pike County 56126
43 Venango County 53814
44 Wayne County 52204
45 Bedford County 49317
46 Mifflin County 46636
47 Huntingdon County 45847
48 Perry County 45650
49 Jefferson County 44879
50 Union County 44773
51 McKean County 42819
52 Susquehanna County 42399
53 Tioga County 42252
54 Warren County 40963
55 Snyder County 40133
56 Clinton County 39835
57 Clarion County 39087
58 Greene County 37880
59 Elk County 31462
60 Wyoming County 28144
61 Juniata County 24478
62 Montour County 18398
63 Potter County 17446
64 Fulton County 14622
65 Forest County 7532
66 Sullivan County 6303
67 Cameron County 4927