Pennsylvania counties by population

Number of counties: 67
Population: 12,970,650
Largest county: Philadelphia County
Table of counties in Pennsylvania sorted by population from largest to smallest.
CountyPopulation
Philadelphia County1,596,865
Allegheny County1,246,116
Montgomery County850,890
Bucks County643,872
Delaware County573,883
Lancaster County550,480
Chester County531,704
York County454,605
Berks County426,967
Lehigh County372,492
Westmoreland County355,107
Luzerne County324,825
Northampton County311,359
Dauphin County284,199
Erie County271,903
Cumberland County257,333
Lackawanna County215,529
Washington County209,090
Butler County192,561
Beaver County168,260
Monroe County168,128
Centre County158,879
Franklin County155,592
Schuylkill County143,308
Lebanon County142,486
Cambria County134,048
Fayette County129,443
Blair County123,132
Lycoming County114,274
Mercer County111,216
Adams County103,782
Northumberland County91,853
Lawrence County86,311
Crawford County84,495
Indiana County83,620
Clearfield County80,667
Somerset County74,331
Armstrong County65,967
Columbia County65,013
Carbon County64,792
Bradford County60,233
Pike County58,345
Wayne County51,244
Venango County50,810
Bedford County47,729
Mifflin County46,156
Perry County45,879
Jefferson County44,491
Huntingdon County44,458
Union County43,094
Tioga County41,089
McKean County40,652
Snyder County39,877
Susquehanna County38,892
Warren County38,791
Clinton County37,824
Clarion County37,571
Greene County36,248
Elk County31,037
Wyoming County26,389
Juniata County23,607
Montour County18,198
Potter County16,478
Fulton County14,529
Forest County7,121
Sullivan County5,935
Cameron County4,596

What is the largest county in Pennsylvania?

Philadelphia County is the largest county in Pennsylvania with a population of 1,596,865.

TOP-5 counties by population in Pennsylvania:
  • Philadelphia County
  • Allegheny County
  • Montgomery County
  • Bucks County
  • Delaware County