Pennsylvania Population By County in 2019

Updated on January 27, 2024.

Based on the US Census Vintage data estimates, in 2019, the population of Pennsylvania was 12,798,883. Among all Pennsylvania counties, Philadelphia had the highest population (1,584,439), followed by Allegheny (1,215,716), and Montgomery (830,397). Cameron was the least populated county (4,425).

Hover over or click on the counties in the map below to see the populations. The data can also be found in a table below. You can use the table to sort, filter, and explore the data further.

You can see similar information for other states and by state for the United States.

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Pennsylvania Population By County in 2019
Pennsylvania Population By County in 2019
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County Population % of State Population
Adams 102776 0.80
Allegheny 1215716 9.50
Armstrong 64699 0.51
Beaver 163956 1.28
Bedford 47913 0.37
Berks 420375 3.28
Blair 121942 0.95
Bradford 60429 0.47
Bucks 628497 4.91
Butler 188313 1.47
Cambria 130107 1.02
Cameron 4425 0.04
Carbon 64125 0.50
Centre 162095 1.27
Chester 525059 4.10
Clarion 38498 0.30
Clearfield 79183 0.62
Clinton 38302 0.30
Columbia 65020 0.51
Crawford 84421 0.66
Cumberland 253133 1.98
Dauphin 278427 2.17
Delaware 566506 4.43
Elk 29894 0.23
Erie 269529 2.11
Fayette 129422 1.01
Forest 7030 0.06
Franklin 155522 1.22
Fulton 14502 0.11
Greene 36062 0.28
Huntingdon 44894 0.35
Indiana 84022 0.66
Jefferson 43299 0.34
Juniata 24760 0.19
Lackawanna 209808 1.64
Lancaster 545441 4.26
Lawrence 85504 0.67
Lebanon 141318 1.10
Lehigh 369308 2.89
Luzerne 317438 2.48
Lycoming 113581 0.89
McKean 40631 0.32
Mercer 109296 0.85
Mifflin 46090 0.36
Monroe 170083 1.33
Montgomery 830397 6.49
Montour 18181 0.14
Northampton 305515 2.39
Northumberland 90684 0.71
Perry 46326 0.36
Philadelphia 1584439 12.38
Pike 55826 0.44
Potter 16545 0.13
Schuylkill 141166 1.10
Snyder 40393 0.32
Somerset 73442 0.57
Sullivan 5959 0.05
Susquehanna 40241 0.31
Tioga 40665 0.32
Union 44498 0.35
Venango 50875 0.40
Warren 39171 0.31
Washington 206866 1.62
Wayne 51271 0.40
Westmoreland 348941 2.73
Wyoming 26790 0.21
York 449341 3.51