RANKING · 2000 CENSUS · 67 SHOWN OF 67

Fastest shrinking, Pennsylvania counties · 2000

Pennsylvania counties with the steepest population decline since the prior decennial census. This list covers the 67 counties in Pennsylvania that qualify, ranked against each other statewide.

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SAME RANKING BYCities States Metros

YEAR2000 2010 2020

RANKPLACESTATEPOPPOPULATION GROWTHVS 2000

01Cambria County, PAPA128,968-6.4%+0%

02Philadelphia County, PAPA1,574,281-4.3%+0%

03Allegheny County, PAPA1,225,035-4.1%+0%

04Venango County, PAPA49,346-3.1%+0%

05Luzerne County, PAPA332,126-2.7%+0%

06Warren County, PAPA37,038-2.6%+0%

07Lackawanna County, PAPA216,502-2.6%+0%

08McKean County, PAPA38,984-2.5%+0%

09Beaver County, PAPA166,032-2.5%+0%

10Northumberland County, PAPA89,920-2.3%+0%

11Lawrence County, PAPA83,911-1.7%+0%

12Armstrong County, PAPA63,698-1.5%+0%

13Schuylkill County, PAPA145,085-1.5%+0%

14Blair County, PAPA119,541-1.1%+0%

15Washington County, PAPA210,802-0.8%+0%

16Mercer County, PAPA107,860-0.6%+0%

17Indiana County, PAPA82,878-0.4%+0%

18Jefferson County, PAPA43,255-0.3%+0%

19Westmoreland County, PAPA349,324-0.1%+0%

20Wyoming County, PAPA25,790+0.0%+0%

21Clarion County, PAPA36,680+0.2%+0%

22Delaware County, PAPA580,937+0.6%+0%

23Tioga County, PAPA40,502+0.6%+0%

24Mifflin County, PAPA46,127+0.6%+0%

25Elk County, PAPA29,926+0.7%+0%

26Cameron County, PAPA4,211+1.0%+0%

27Lycoming County, PAPA112,587+1.1%+0%

28Columbia County, PAPA66,193+1.5%+0%

29Erie County, PAPA265,832+1.9%+0%

30Clinton County, PAPA37,870+2.0%+0%

31Fayette County, PAPA123,021+2.3%+0%

32Somerset County, PAPA72,004+2.3%+0%

33Snyder County, PAPA39,655+2.4%+0%

34Montour County, PAPA17,868+2.8%+0%

35Greene County, PAPA33,885+2.8%+0%

36Bradford County, PAPA59,600+2.9%+0%

37Forest County, PAPA6,614+3.0%+0%

38Fulton County, PAPA14,483+3.1%+0%

39Huntingdon County, PAPA43,001+3.2%+0%

40Carbon County, PAPA65,868+3.4%+0%

41Bedford County, PAPA47,480+4.3%+0%

42Susquehanna County, PAPA38,237+4.6%+0%

43Crawford County, PAPA81,792+4.9%+0%

44Lebanon County, PAPA146,380+5.8%+0%

45Dauphin County, PAPA293,351+5.9%+0%

46Perry County, PAPA46,806+5.9%+0%

47Clearfield County, PAPA78,100+6.8%+0%

48Franklin County, PAPA160,652+6.8%+0%

49Lehigh County, PAPA384,383+7.2%+0%

50Sullivan County, PAPA5,856+7.4%+0%

51Northampton County, PAPA324,411+8.1%+0%

52Potter County, PAPA15,897+8.2%+0%

53Cumberland County, PAPA277,270+9.4%+0%

54Centre County, PAPA157,393+9.7%+0%

55Bucks County, PAPA647,828+10.4%+0%

56Montgomery County, PAPA877,643+10.6%+0%

57Juniata County, PAPA23,403+10.6%+0%

58Berks County, PAPA440,072+11.0%+0%

59Lancaster County, PAPA563,159+11.3%+0%

60York County, PAPA473,197+12.4%+0%

61Butler County, PAPA200,169+14.5%+0%

62Union County, PAPA42,313+15.1%+0%

63Chester County, PAPA557,116+15.2%+0%

64Adams County, PAPA107,594+16.6%+0%

65Wayne County, PAPA51,703+19.5%+0%

66Monroe County, PAPA167,179+44.9%+0%

67Pike County, PAPA62,808+65.6%+0%

SHOWING 1–67 OF 67

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UPDATED 2026-06-02 · DATA: US CENSUS BUREAU ACS 5-YEAR ESTIMATES