RANKING · 2025 ESTIMATES · 67 SHOWN OF 67

Fastest shrinking, Pennsylvania counties

Pennsylvania counties with the steepest population decline from the 2020 census to 2025. This list covers the 67 counties in Pennsylvania that qualify, ranked against each other statewide. The median across all 67 is -0.5%. Biggest climber in the top 100 since 2020: Philadelphia County, PA, up 35 places to #23.

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SAME RANKING BYCities States Metros

YEAR2000 2010 2020 2025

RANKPLACESTATEPOPPOPULATION GROWTHVS 2000

01▲1Cameron County, PAPA4,211-7.4%−8.4 pts

02▲7Greene County, PAPA33,885-5.8%−8.6 pts

03Forest County, PAPA6,614-5.1%−8.1 pts

04▲10Fayette County, PAPA123,021-4.5%−6.8 pts

05▲2Warren County, PAPA37,038-4.0%−1.4 pts

06▲4McKean County, PAPA38,984-3.6%−1.0 pts

07▲25Elk County, PAPA29,926-3.4%−4.1 pts

08Cambria County, PAPA128,968-3.4%+3.0 pts

09▲30Clearfield County, PAPA78,100-3.1%−9.8 pts

10▲3Potter County, PAPA15,897-3.0%−11.2 pts

11▲9Somerset County, PAPA72,004-2.9%−5.2 pts

12▲7Armstrong County, PAPA63,698-2.8%−1.4 pts

13▲24Jefferson County, PAPA43,255-2.8%−2.5 pts

14▲15Blair County, PAPA119,541-2.7%−1.6 pts

15▲1Crawford County, PAPA81,792-2.6%−7.4 pts

16▲1Mercer County, PAPA107,860-2.5%−1.9 pts

17▼2Lawrence County, PAPA83,911-2.5%−0.8 pts

18▲7Huntingdon County, PAPA43,001-2.5%−5.7 pts

19▼14Venango County, PAPA49,346-2.2%+0.9 pts

20▲30Allegheny County, PAPA1,225,035-2.0%+2.1 pts

21▲10Northumberland County, PAPA89,920-1.9%+0.4 pts

22▲6Erie County, PAPA265,832-1.9%−3.8 pts

23▲35Philadelphia County, PAPA1,574,281-1.8%+2.4 pts

24▼13Clarion County, PAPA36,680-1.5%−1.7 pts

25▲8Westmoreland County, PAPA349,324-1.5%−1.4 pts

26▲17Montour County, PAPA17,868-1.5%−4.3 pts

27▲9Lycoming County, PAPA112,587-1.4%−2.5 pts

28▲6Tioga County, PAPA40,502-1.3%−1.9 pts

29▲9Beaver County, PAPA166,032-1.3%+1.2 pts

30▼24Wyoming County, PAPA25,790-1.1%−1.1 pts

31▼13Union County, PAPA42,313-0.9%−15.9 pts

32▲9Monroe County, PAPA167,179-0.7%−45.6 pts

33▼9Bradford County, PAPA59,600-0.6%−3.6 pts

34▼33Susquehanna County, PAPA38,237-0.5%−5.1 pts

35Fulton County, PAPA14,483-0.5%−3.6 pts

36▲16Centre County, PAPA157,393-0.5%−10.2 pts

37▼16Juniata County, PAPA23,403-0.5%−11.1 pts

38▼26Indiana County, PAPA82,878-0.4%0.0 pts

39▼16Bedford County, PAPA47,480-0.2%−4.5 pts

40▲5Snyder County, PAPA39,655-0.2%−2.6 pts

41▼1Mifflin County, PAPA46,127-0.0%−0.7 pts

42▲12Bucks County, PAPA647,828+0.2%−10.2 pts

43▼39Sullivan County, PAPA5,856+0.3%−7.1 pts

44▲2Lackawanna County, PAPA216,502+0.3%+2.9 pts

45▲2Washington County, PAPA210,802+0.7%+1.5 pts

46▲7Delaware County, PAPA580,937+0.7%+0.1 pts

47▼17Wayne County, PAPA51,703+1.1%−18.4 pts

48▼26Clinton County, PAPA37,870+1.1%−0.8 pts

49▼22Schuylkill County, PAPA145,085+1.4%+2.9 pts

50▼8Carbon County, PAPA65,868+1.7%−1.7 pts

51▲10Lancaster County, PAPA563,159+1.8%−9.5 pts

52▼4Luzerne County, PAPA332,126+2.0%+4.7 pts

53▼9Perry County, PAPA46,806+2.1%−3.8 pts

54▲12Lebanon County, PAPA146,380+2.2%−3.6 pts

55▼29Columbia County, PAPA66,193+2.3%+0.8 pts

56▲6Dauphin County, PAPA293,351+2.4%−3.5 pts

57▲6Montgomery County, PAPA877,643+2.5%−8.2 pts

58▼2Berks County, PAPA440,072+2.6%−8.4 pts

59▲6Lehigh County, PAPA384,383+2.6%−4.6 pts

60▼5Franklin County, PAPA160,652+3.0%−3.8 pts

61▼1Butler County, PAPA200,169+3.3%−11.2 pts

62▼11Adams County, PAPA107,594+3.6%−13.0 pts

63▼4Northampton County, PAPA324,411+3.7%−4.4 pts

64▼7York County, PAPA473,197+3.7%−8.7 pts

65▼1Chester County, PAPA557,116+4.2%−10.9 pts

66▲1Cumberland County, PAPA277,270+6.9%−2.6 pts

67▼18Pike County, PAPA62,808+7.3%−58.3 pts

SHOWING 1–67 OF 67

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UPDATED 2026-09-11 · DATA: US CENSUS BUREAU POPULATION ESTIMATES