RANKING · 2025 ESTIMATES · 67 SHOWN OF 67

Fastest growing, Pennsylvania counties

Pennsylvania counties ranked by population growth from the 2020 census to 2025. 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 2000

01Pike County, PAPA62,808+7.3%−58.3 pts

02Cumberland County, PAPA277,270+6.9%−2.6 pts

03Chester County, PAPA557,116+4.2%−10.9 pts

04York County, PAPA473,197+3.7%−8.7 pts

05Northampton County, PAPA324,411+3.7%−4.4 pts

06Adams County, PAPA107,594+3.6%−13.0 pts

07Butler County, PAPA200,169+3.3%−11.2 pts

08Franklin County, PAPA160,652+3.0%−3.8 pts

09Lehigh County, PAPA384,383+2.6%−4.6 pts

10Berks County, PAPA440,072+2.6%−8.4 pts

11Montgomery County, PAPA877,643+2.5%−8.2 pts

12Dauphin County, PAPA293,351+2.4%−3.5 pts

13Columbia County, PAPA66,193+2.3%+0.8 pts

14Lebanon County, PAPA146,380+2.2%−3.6 pts

15Perry County, PAPA46,806+2.1%−3.8 pts

16Luzerne County, PAPA332,126+2.0%+4.7 pts

17Lancaster County, PAPA563,159+1.8%−9.5 pts

18Carbon County, PAPA65,868+1.7%−1.7 pts

19Schuylkill County, PAPA145,085+1.4%+2.9 pts

20Clinton County, PAPA37,870+1.1%−0.8 pts

21Wayne County, PAPA51,703+1.1%−18.4 pts

22Delaware County, PAPA580,937+0.7%+0.1 pts

23Washington County, PAPA210,802+0.7%+1.5 pts

24Lackawanna County, PAPA216,502+0.3%+2.9 pts

25Sullivan County, PAPA5,856+0.3%−7.1 pts

26Bucks County, PAPA647,828+0.2%−10.2 pts

27Mifflin County, PAPA46,127-0.0%−0.7 pts

28Snyder County, PAPA39,655-0.2%−2.6 pts

29Bedford County, PAPA47,480-0.2%−4.5 pts

30Indiana County, PAPA82,878-0.4%−0.0 pts

31Juniata County, PAPA23,403-0.5%−11.1 pts

32Centre County, PAPA157,393-0.5%−10.2 pts

33Fulton County, PAPA14,483-0.5%−3.6 pts

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

35Bradford County, PAPA59,600-0.6%−3.6 pts

36Monroe County, PAPA167,179-0.7%−45.6 pts

37Union County, PAPA42,313-0.9%−15.9 pts

38Wyoming County, PAPA25,790-1.1%−1.1 pts

39Beaver County, PAPA166,032-1.3%+1.2 pts

40Tioga County, PAPA40,502-1.3%−1.9 pts

41Lycoming County, PAPA112,587-1.4%−2.5 pts

42Montour County, PAPA17,868-1.5%−4.3 pts

43Westmoreland County, PAPA349,324-1.5%−1.4 pts

44Clarion County, PAPA36,680-1.5%−1.7 pts

45Philadelphia County, PAPA1,574,281-1.8%+2.4 pts

46Erie County, PAPA265,832-1.9%−3.8 pts

47Northumberland County, PAPA89,920-1.9%+0.4 pts

48Allegheny County, PAPA1,225,035-2.0%+2.1 pts

49Venango County, PAPA49,346-2.2%+0.9 pts

50Huntingdon County, PAPA43,001-2.5%−5.7 pts

51Lawrence County, PAPA83,911-2.5%−0.8 pts

52Mercer County, PAPA107,860-2.5%−1.9 pts

53Crawford County, PAPA81,792-2.6%−7.4 pts

54Blair County, PAPA119,541-2.7%−1.6 pts

55Jefferson County, PAPA43,255-2.8%−2.5 pts

56Armstrong County, PAPA63,698-2.8%−1.4 pts

57Somerset County, PAPA72,004-2.9%−5.2 pts

58Potter County, PAPA15,897-3.0%−11.2 pts

59Clearfield County, PAPA78,100-3.1%−9.8 pts

60Cambria County, PAPA128,968-3.4%+3.0 pts

61Elk County, PAPA29,926-3.4%−4.1 pts

62McKean County, PAPA38,984-3.6%−1.0 pts

63Warren County, PAPA37,038-4.0%−1.4 pts

64Fayette County, PAPA123,021-4.5%−6.8 pts

65Forest County, PAPA6,614-5.1%−8.1 pts

66Greene County, PAPA33,885-5.8%−8.6 pts

67Cameron County, PAPA4,211-7.4%−8.4 pts

SHOWING 1–67 OF 67

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UPDATED 2026-08-08 · DATA: US CENSUS BUREAU POPULATION ESTIMATES