Population in Pennsylvania by County

Total population.

U.S. Census Bureau · ACS 5-year 2020-2024 · Updated November 2026

Pennsylvania

13,018,639

Counties

67

Highest

Philadelphia

1,579,706

Lowest

Cameron

4,427

All Pennsylvania counties, ranked

# Counties Population
1 Philadelphia 1,579,706
2 Allegheny 1,238,177
3 Montgomery 867,573
4 Bucks 647,461
5 Delaware 579,222
6 Lancaster 557,931
7 Chester 547,840
8 York 462,924
9 Berks 433,015
10 Lehigh 378,792
11 Westmoreland 352,500
12 Luzerne 327,675
13 Northampton 318,580
14 Dauphin 289,593
15 Erie 269,052
16 Cumberland 268,323
17 Lackawanna 216,146
18 Washington 210,042
19 Butler 197,254
20 Monroe 167,515
21 Beaver 166,324
22 Centre 158,576
23 Franklin 157,379
24 Lebanon 144,186
25 Schuylkill 143,558
26 Cambria 131,538
27 Fayette 125,997
28 Blair 121,277
29 Lycoming 113,489
30 Mercer 109,257
31 Adams 106,115
32 Northumberland 90,560
33 Lawrence 85,024
34 Indiana 83,042
35 Crawford 82,716
36 Clearfield 78,635
37 Somerset 72,799
38 Carbon 65,382
39 Columbia 65,362
40 Armstrong 64,622
41 Pike 60,621
42 Bradford 59,858
43 Wayne 51,262
44 Venango 49,801
45 Bedford 47,513
46 Perry 46,239
47 Mifflin 46,041
48 Jefferson 43,864
49 Huntingdon 43,653
50 Union 42,456
51 Tioga 40,945
52 McKean 39,904
53 Snyder 39,668
54 Susquehanna 38,219
55 Warren 37,920
56 Clinton 37,798
57 Clarion 37,179
58 Greene 34,835
59 Elk 30,506
60 Wyoming 25,967
61 Juniata 23,379
62 Montour 18,103
63 Potter 16,188
64 Fulton 14,531
65 Forest 6,715
66 Sullivan 5,888
67 Cameron 4,427

About this dataset

Total population. Source: ACS 5-year 2020-2024 Data Profile, variable DP05_0001E. Values in people.

Source
U.S. Census Bureau
Citation
U.S. Census Bureau, American Community Survey 5-Year Estimates Data Profiles (2020-2024), DP05_0001E
Vintage
ACS 5-year 2020-2024
License
Public domain (U.S. Census Bureau)
Unit
people
Available at
State · County · ZIP code
Territory roll-up
Summed across each territory
Last loaded
November 2026

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US Population nationwide