Pennsylvania Citizen Population By County in 2010 (ACS-5Yrs)

Updated on March 28, 2026.

Based on the US Census Bureau's special tabulation from the ACS 5-year estimates, in 2010, the citizen population for Pennsylvania was 12,255,350 and represented 97.17% of the total Pennsylvania population.

Among all Pennsylvania counties, Philadelphia had the highest citizen population (1.41M), followed by Allegheny (1.19M), and Montgomery (756.00K).

In terms of percentages, Bedford had the highest percentage of its population being citizens (99.86%), followed by Jefferson (99.85%), and Potter (99.80%).

The chart and table below shows the citizen population of each county and the percentage of each county's population that were citizens.

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

You may also be interested in:
Pennsylvania Citizen Voting-age Population By County in 2010

Data Source: US Census - ACS 5-Year (CVAP).

See this for other years:

Pennsylvania Citizen Population By County in 2010

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County	Citizen Population	% of County Population
Philadelphia	1412620	93.87
Allegheny	1193170	97.56
Montgomery	755995	95.64
Bucks	601495	96.57
Delaware	533065	95.79
Lancaster	500315	97.86
Chester	465770	94.95
York	420480	98.20
Berks	391695	96.17
Westmoreland	363740	99.43
Lehigh	328740	95.58
Luzerne	311920	97.74
Northampton	285575	96.96
Erie	273845	98.07
Dauphin	256440	96.83
Cumberland	226075	97.73
Lackawanna	208710	97.65
Washington	206035	99.54
Butler	181320	99.32
Beaver	170670	99.48
Monroe	162320	96.57
Schuylkill	146655	98.90
Centre	144900	95.70
Franklin	143885	98.18
Cambria	143710	99.29
Fayette	138025	99.44
Lebanon	129670	98.73
Blair	126535	99.58
Mercer	116605	99.41
Lycoming	115845	99.55
Adams	98180	97.36
Northumberland	93485	99.35
Lawrence	91235	99.52
Crawford	88680	99.47
Indiana	87890	99.04
Clearfield	81860	99.67
Somerset	77980	99.69
Armstrong	69215	99.60
Columbia	66095	99.18
Carbon	63855	98.90
Bradford	62040	99.40
Pike	55675	97.68
Venango	55175	99.74
Wayne	51670	98.80
Bedford	49810	99.86
Mifflin	46470	99.75
Huntingdon	45525	99.33
Perry	45390	99.54
Jefferson	45175	99.85
McKean	43665	99.57
Union	43495	96.95
Susquehanna	43115	99.47
Warren	41710	99.61
Tioga	41480	99.64
Clarion	40140	99.63
Snyder	39150	99.37
Greene	38870	99.65
Clinton	38595	99.04
Elk	32410	99.78
Wyoming	28060	99.29
Juniata	24185	99.18
Montour	17760	97.85
Potter	17550	99.80
Fulton	14770	99.53
Forest	7555	99.60
Sullivan	6435	99.54
Cameron	5160	99.33