RANKING · 2000 CENSUS · 67 SHOWN OF 67

Fastest growing, Pennsylvania counties · 2000

Pennsylvania counties ranked by population growth from the 1990 census to 2000. This list covers the 67 counties in Pennsylvania that qualify, ranked against each other statewide.

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SAME RANKING BYCities States Metros

RELATEDLargest by population Fastest shrinking Most population gained Most population lost Most densely populated Most sparsely populated

YEAR2000 2010 2020 2025

RANKPLACESTATEPOPPOPULATION GROWTHVS –

01Pike County, PAPA62,808+65.6%–

02Monroe County, PAPA167,179+44.9%–

03Wayne County, PAPA51,703+19.5%–

04Adams County, PAPA107,594+16.6%–

05Chester County, PAPA557,116+15.2%–

06Union County, PAPA42,313+15.1%–

07Butler County, PAPA200,169+14.5%–

08York County, PAPA473,197+12.4%–

09Lancaster County, PAPA563,159+11.3%–

10Berks County, PAPA440,072+11.0%–

11Juniata County, PAPA23,403+10.6%–

12Montgomery County, PAPA877,643+10.6%–

13Bucks County, PAPA647,828+10.4%–

14Centre County, PAPA157,393+9.7%–

15Cumberland County, PAPA277,270+9.4%–

16Potter County, PAPA15,897+8.2%–

17Northampton County, PAPA324,411+8.1%–

18Sullivan County, PAPA5,856+7.4%–

19Lehigh County, PAPA384,383+7.2%–

20Franklin County, PAPA160,652+6.8%–

21Clearfield County, PAPA78,100+6.8%–

22Perry County, PAPA46,806+5.9%–

23Dauphin County, PAPA293,351+5.9%–

24Lebanon County, PAPA146,380+5.8%–

25Crawford County, PAPA81,792+4.9%–

26Susquehanna County, PAPA38,237+4.6%–

27Bedford County, PAPA47,480+4.3%–

28Carbon County, PAPA65,868+3.4%–

29Huntingdon County, PAPA43,001+3.2%–

30Fulton County, PAPA14,483+3.1%–

31Forest County, PAPA6,614+3.0%–

32Bradford County, PAPA59,600+2.9%–

33Greene County, PAPA33,885+2.8%–

34Montour County, PAPA17,868+2.8%–

35Snyder County, PAPA39,655+2.4%–

36Somerset County, PAPA72,004+2.3%–

37Fayette County, PAPA123,021+2.3%–

38Clinton County, PAPA37,870+2.0%–

39Erie County, PAPA265,832+1.9%–

40Columbia County, PAPA66,193+1.5%–

41Lycoming County, PAPA112,587+1.1%–

42Cameron County, PAPA4,211+1.0%–

43Elk County, PAPA29,926+0.7%–

44Mifflin County, PAPA46,127+0.6%–

45Tioga County, PAPA40,502+0.6%–

46Delaware County, PAPA580,937+0.6%–

47Clarion County, PAPA36,680+0.2%–

48Wyoming County, PAPA25,790+0.0%–

49Westmoreland County, PAPA349,324-0.1%–

50Jefferson County, PAPA43,255-0.3%–

51Indiana County, PAPA82,878-0.4%–

52Mercer County, PAPA107,860-0.6%–

53Washington County, PAPA210,802-0.8%–

54Blair County, PAPA119,541-1.1%–

55Schuylkill County, PAPA145,085-1.5%–

56Armstrong County, PAPA63,698-1.5%–

57Lawrence County, PAPA83,911-1.7%–

58Northumberland County, PAPA89,920-2.3%–

59Beaver County, PAPA166,032-2.5%–

60McKean County, PAPA38,984-2.5%–

61Lackawanna County, PAPA216,502-2.6%–

62Warren County, PAPA37,038-2.6%–

63Luzerne County, PAPA332,126-2.7%–

64Venango County, PAPA49,346-3.1%–

65Allegheny County, PAPA1,225,035-4.1%–

66Philadelphia County, PAPA1,574,281-4.3%–

67Cambria County, PAPA128,968-6.4%–

SHOWING 1–67 OF 67

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UPDATED 2026-07-15 · DATA: US CENSUS BUREAU DECENNIAL CENSUS