Population of Counties in Pennsylvania (2017)

Name 2017 Population Growth Rate
Philadelphia County1,567,8722.58%
Allegheny County1,225,3650.11%
Montgomery County821,7252.57%
Bucks County626,3990.14%
Delaware County563,4020.77%
Lancaster County538,5003.49%
Chester County516,3123.27%
York County443,7441.88%
Berks County414,8120.69%
Lehigh County363,1473.70%
Westmoreland County355,458-2.65%
Luzerne County316,383-1.44%
Northampton County302,2941.42%
Erie County276,207-1.63%
Dauphin County273,7072.03%
Cumberland County248,5065.31%
Lackawanna County211,321-1.49%
Washington County207,9810.04%
Butler County186,8471.48%
Beaver County167,429-1.86%
Monroe County166,098-2.24%
Centre County161,4644.64%
Franklin County153,8512.60%
Schuylkill County143,573-3.13%
Lebanon County138,8633.88%
Cambria County134,732-6.09%
Fayette County132,733-2.74%
Blair County124,650-1.89%
Lycoming County115,248-0.82%
Mercer County112,913-3.19%
Adams County102,1800.69%
Northumberland County92,541-1.92%
Lawrence County87,294-4.04%
Indiana County86,364-2.80%
Crawford County86,257-2.74%
Clearfield County80,596-1.15%
Somerset County75,061-3.47%
Armstrong County66,486-3.45%
Columbia County66,420-1.40%
Carbon County63,594-2.52%
Bradford County60,770-2.95%
Pike County55,562-3.05%
Venango County52,582-4.33%
Wayne County50,710-4.14%
Bedford County48,325-2.79%
Mifflin County46,342-0.67%
Perry County45,820-0.39%
Huntingdon County45,634-0.83%
Union County45,5651.32%
Jefferson County44,073-2.49%
McKean County41,883-3.41%
Tioga County41,467-1.34%
Susquehanna County40,862-5.85%
Snyder County40,4681.82%
Warren County40,025-4.14%
Clinton County39,233-0.04%
Clarion County38,513-3.55%
Greene County37,197-3.65%
Elk County30,480-4.33%
Wyoming County27,521-2.50%
Juniata County24,8631.33%
Montour County18,3430.20%
Potter County16,885-3.35%
Fulton County14,640-1.53%
Forest County7,321-4.96%
Sullivan County6,137-4.26%
Cameron County4,677-7.82%