Population
|
County
|
1,526,006
|
Philadelphia
|
1,223,348
|
Allegheny
|
799,874
|
Montgomery
|
625,249
|
Bucks
|
558,979
|
Delaware
|
519,445
|
Lancaster
|
498,886
|
Chester
|
434,972
|
York
|
411,442
|
Berks
|
365,169
|
Westmoreland
|
349,497
|
Lehigh
|
320,918
|
Luzerne
|
297,735
|
Northampton
|
280,566
|
Erie
|
268,100
|
Dauphin
|
235,406
|
Cumberland
|
214,437
|
Lackawanna
|
207,820
|
Washington
|
183,862
|
Butler
|
170,539
|
Beaver
|
169,842
|
Monroe
|
153,990
|
Centre
|
149,618
|
Franklin
|
|
Population
|
County
|
148,289
|
Schuylkill
|
143,679
|
Cambria
|
136,606
|
Fayette
|
133,568
|
Lebanon
|
127,089
|
Blair
|
116,638
|
Mercer
|
116,111
|
Lycoming
|
101,407
|
Adams
|
94,528
|
Northumberland
|
91,108
|
Lawrence
|
88,880
|
Indiana
|
88,765
|
Crawford
|
81,642
|
Clearfield
|
77,742
|
Somerset
|
68,941
|
Armstrong
|
67,295
|
Columbia
|
65,249
|
Carbon
|
62,622
|
Bradford
|
57,369
|
Pike
|
54,984
|
Venango
|
52,822
|
Wayne
|
49,762
|
Bedford
|
46,682
|
Mifflin
|
|
Population
|
County
|
45,969
|
Perry
|
45,913
|
Huntingdon
|
45,200
|
Jefferson
|
44,947
|
Union
|
43,450
|
McKean
|
43,356
|
Susquehanna
|
41,981
|
Tioga
|
41,815
|
Warren
|
39,988
|
Clarion
|
39,702
|
Snyder
|
39,238
|
Clinton
|
38,686
|
Greene
|
31,946
|
Elk
|
28,276
|
Wyoming
|
24,636
|
Juniata
|
18,267
|
Montour
|
17,457
|
Potter
|
14,845
|
Fulton
|
7,716
|
Forest
|
6,428
|
Sullivan
|
5,085
|
Cameron
|
|