Pennsylvania Population By County in 2023

Updated on June 16, 2025.

Based on the US Census Vintage data estimates, in 2023, the population of Pennsylvania was 13,017,721. Among all Pennsylvania counties, Philadelphia had the highest population (1,563,349), followed by Allegheny (1,230,138), and Montgomery (871,673).

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.

Related Topics: Pennsylvania Census Vintage Data Topic List.

Data Source: US Census Bureau (Vintage).

See this for other years:

Pennsylvania Population By County in 2023

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County	Population	% of State Population
Adams	107147	0.82
Allegheny	1230138	9.45
Armstrong	64094	0.49
Beaver	165556	1.27
Bedford	47442	0.36
Berks	435284	3.34
Blair	120494	0.93
Bradford	59700	0.46
Bucks	647625	4.97
Butler	198665	1.53
Cambria	130713	1.00
Cameron	4382	0.03
Carbon	65427	0.50
Centre	159087	1.22
Chester	555310	4.27
Clarion	36964	0.28
Clearfield	78381	0.60
Clinton	37852	0.29
Columbia	65782	0.51
Crawford	82052	0.63
Cumberland	271553	2.09
Dauphin	290886	2.24
Delaware	580538	4.46
Elk	30221	0.23
Erie	268203	2.06
Fayette	124699	0.96
Forest	6486	0.05
Franklin	158054	1.21
Fulton	14510	0.11
Greene	34493	0.27
Huntingdon	43545	0.34
Indiana	83110	0.64
Jefferson	43625	0.34
Juniata	23368	0.18
Lackawanna	216472	1.66
Lancaster	560174	4.30
Lawrence	84553	0.65
Lebanon	144546	1.11
Lehigh	380872	2.93
Luzerne	328909	2.53
Lycoming	113282	0.87
McKean	39522	0.30
Mercer	108519	0.83
Mifflin	45950	0.35
Monroe	166581	1.28
Montgomery	871673	6.70
Montour	18053	0.14
Northampton	320844	2.47
Northumberland	90131	0.69
Perry	46367	0.36
Philadelphia	1563349	12.01
Pike	61496	0.47
Potter	16040	0.12
Schuylkill	143932	1.11
Snyder	39699	0.31
Somerset	72233	0.56
Sullivan	5925	0.05
Susquehanna	38108	0.29
Tioga	40747	0.31
Union	42237	0.32
Venango	49436	0.38
Warren	37672	0.29
Washington	210344	1.62
Wayne	51404	0.40
Westmoreland	351420	2.70
Wyoming	25868	0.20
York	465977	3.58