RANKING · 2020 CENSUS · 67 SHOWN OF 67

Fastest shrinking, Pennsylvania counties · 2020

Pennsylvania counties with the steepest population decline from the 2010 census to 2020. 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 growing Most population gained Most population lost Most densely populated Most sparsely populated

YEAR2000 2010 2020 2025

RANKPLACESTATEPOPPOPULATION GROWTHVS 2000

01Susquehanna County, PAPA38,237-11.4%−16.0 pts

02Cameron County, PAPA4,211-10.6%−11.6 pts

03Forest County, PAPA6,614-9.6%−12.6 pts

04Sullivan County, PAPA5,856-9.1%−16.6 pts

05Venango County, PAPA49,346-8.2%−5.2 pts

06Wyoming County, PAPA25,790-7.8%−7.8 pts

07Warren County, PAPA37,038-7.7%−5.1 pts

08Cambria County, PAPA128,968-7.1%−0.7 pts

09Greene County, PAPA33,885-7.1%−9.9 pts

10McKean County, PAPA38,984-6.9%−4.4 pts

11Clarion County, PAPA36,680-6.9%−7.0 pts

12Indiana County, PAPA82,878-6.3%−5.9 pts

13Potter County, PAPA15,897-6.1%−14.2 pts

14Fayette County, PAPA123,021-5.7%−8.0 pts

15Lawrence County, PAPA83,911-5.5%−3.9 pts

16Crawford County, PAPA81,792-5.4%−10.3 pts

17Mercer County, PAPA107,860-5.1%−4.5 pts

18Union County, PAPA42,313-5.0%−20.1 pts

19Armstrong County, PAPA63,698-4.9%−3.4 pts

20Somerset County, PAPA72,004-4.6%−7.0 pts

21Juniata County, PAPA23,403-4.6%−15.2 pts

22Clinton County, PAPA37,870-4.6%−6.5 pts

23Bedford County, PAPA47,480-4.4%−8.7 pts

24Bradford County, PAPA59,600-4.2%−7.2 pts

25Huntingdon County, PAPA43,001-4.0%−7.2 pts

26Columbia County, PAPA66,193-3.8%−5.3 pts

27Schuylkill County, PAPA145,085-3.5%−2.1 pts

28Erie County, PAPA265,832-3.5%−5.4 pts

29Blair County, PAPA119,541-3.4%−2.3 pts

30Wayne County, PAPA51,703-3.2%−22.6 pts

31Northumberland County, PAPA89,920-3.0%−0.8 pts

32Elk County, PAPA29,926-3.0%−3.7 pts

33Westmoreland County, PAPA349,324-2.9%−2.8 pts

34Tioga County, PAPA40,502-2.2%−2.8 pts

35Fulton County, PAPA14,483-1.9%−5.0 pts

36Lycoming County, PAPA112,587-1.7%−2.8 pts

37Jefferson County, PAPA43,255-1.6%−1.2 pts

38Beaver County, PAPA166,032-1.4%+1.2 pts

39Clearfield County, PAPA78,100-1.3%−8.1 pts

40Mifflin County, PAPA46,127-1.2%−1.8 pts

41Monroe County, PAPA167,179-0.9%−45.8 pts

42Carbon County, PAPA65,868-0.8%−4.2 pts

43Montour County, PAPA17,868-0.7%−3.5 pts

44Perry County, PAPA46,806-0.3%−6.2 pts

45Snyder County, PAPA39,655+0.1%−2.3 pts

46Lackawanna County, PAPA216,502+0.7%+3.3 pts

47Washington County, PAPA210,802+0.7%+1.6 pts

48Luzerne County, PAPA332,126+1.5%+4.2 pts

49Pike County, PAPA62,808+2.0%−63.5 pts

50Allegheny County, PAPA1,225,035+2.2%+6.3 pts

51Adams County, PAPA107,594+2.4%−14.2 pts

52Centre County, PAPA157,393+2.7%−7.0 pts

53Delaware County, PAPA580,937+3.2%+2.6 pts

54Bucks County, PAPA647,828+3.4%−7.0 pts

55Franklin County, PAPA160,652+4.2%−2.6 pts

56Berks County, PAPA440,072+4.2%−6.8 pts

57York County, PAPA473,197+4.9%−7.5 pts

58Philadelphia County, PAPA1,574,281+5.1%+9.4 pts

59Northampton County, PAPA324,411+5.1%−3.0 pts

60Butler County, PAPA200,169+5.4%−9.1 pts

61Lancaster County, PAPA563,159+6.5%−4.9 pts

62Dauphin County, PAPA293,351+6.8%+0.9 pts

63Montgomery County, PAPA877,643+7.1%−3.5 pts

64Chester County, PAPA557,116+7.1%−8.1 pts

65Lehigh County, PAPA384,383+7.2%−0.0 pts

66Lebanon County, PAPA146,380+7.3%+1.5 pts

67Cumberland County, PAPA277,270+10.2%+0.8 pts

SHOWING 1–67 OF 67

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UPDATED 2026-08-08 · DATA: US CENSUS BUREAU DECENNIAL CENSUS