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. The median across all 67 is -0.5%. Biggest climber in the top 100 since 2020: Sullivan County, PA, up 39 places to #25.

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SAME RANKING BYCities States Metros

YEAR2000 2010 2020 2025

RANKPLACESTATEPOPPOPULATION GROWTHVS 2000

01▲18Pike County, PAPA62,808+7.3%−58.3 pts

02▼1Cumberland County, PAPA277,270+6.9%−2.6 pts

03▲1Chester County, PAPA557,116+4.2%−10.9 pts

04▲7York County, PAPA473,197+3.7%−8.7 pts

05▲4Northampton County, PAPA324,411+3.7%−4.4 pts

06▲11Adams County, PAPA107,594+3.6%−13.0 pts

07▲1Butler County, PAPA200,169+3.3%−11.2 pts

08▲5Franklin County, PAPA160,652+3.0%−3.8 pts

09▼6Lehigh County, PAPA384,383+2.6%−4.6 pts

10▲2Berks County, PAPA440,072+2.6%−8.4 pts

11▼6Montgomery County, PAPA877,643+2.5%−8.2 pts

12▼6Dauphin County, PAPA293,351+2.4%−3.5 pts

13▲29Columbia County, PAPA66,193+2.3%+0.8 pts

14▼12Lebanon County, PAPA146,380+2.2%−3.6 pts

15▲9Perry County, PAPA46,806+2.1%−3.8 pts

16▲4Luzerne County, PAPA332,126+2.0%+4.7 pts

17▼10Lancaster County, PAPA563,159+1.8%−9.5 pts

18▲8Carbon County, PAPA65,868+1.7%−1.7 pts

19▲22Schuylkill County, PAPA145,085+1.4%+2.9 pts

20▲26Clinton County, PAPA37,870+1.1%−0.8 pts

21▲17Wayne County, PAPA51,703+1.1%−18.4 pts

22▼7Delaware County, PAPA580,937+0.7%+0.1 pts

23▼2Washington County, PAPA210,802+0.7%+1.5 pts

24▼2Lackawanna County, PAPA216,502+0.3%+2.9 pts

25▲39Sullivan County, PAPA5,856+0.3%−7.1 pts

26▼12Bucks County, PAPA647,828+0.2%−10.2 pts

27▲1Mifflin County, PAPA46,127-0.0%−0.7 pts

28▼5Snyder County, PAPA39,655-0.2%−2.6 pts

29▲16Bedford County, PAPA47,480-0.2%−4.5 pts

30▲26Indiana County, PAPA82,878-0.4%0.0 pts

31▲16Juniata County, PAPA23,403-0.5%−11.1 pts

32▼16Centre County, PAPA157,393-0.5%−10.2 pts

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

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

35▲9Bradford County, PAPA59,600-0.6%−3.6 pts

36▼9Monroe County, PAPA167,179-0.7%−45.6 pts

37▲13Union County, PAPA42,313-0.9%−15.9 pts

38▲24Wyoming County, PAPA25,790-1.1%−1.1 pts

39▼9Beaver County, PAPA166,032-1.3%+1.2 pts

40▼6Tioga County, PAPA40,502-1.3%−1.9 pts

41▼9Lycoming County, PAPA112,587-1.4%−2.5 pts

42▼17Montour County, PAPA17,868-1.5%−4.3 pts

43▼8Westmoreland County, PAPA349,324-1.5%−1.4 pts

44▲13Clarion County, PAPA36,680-1.5%−1.7 pts

45▼35Philadelphia County, PAPA1,574,281-1.8%+2.4 pts

46▼6Erie County, PAPA265,832-1.9%−3.8 pts

47▼10Northumberland County, PAPA89,920-1.9%+0.4 pts

48▼30Allegheny County, PAPA1,225,035-2.0%+2.1 pts

49▲14Venango County, PAPA49,346-2.2%+0.9 pts

50▼7Huntingdon County, PAPA43,001-2.5%−5.7 pts

51▲2Lawrence County, PAPA83,911-2.5%−0.8 pts

52▼1Mercer County, PAPA107,860-2.5%−1.9 pts

53▼1Crawford County, PAPA81,792-2.6%−7.4 pts

54▼15Blair County, PAPA119,541-2.7%−1.6 pts

55▼24Jefferson County, PAPA43,255-2.8%−2.5 pts

56▼7Armstrong County, PAPA63,698-2.8%−1.4 pts

57▼9Somerset County, PAPA72,004-2.9%−5.2 pts

58▼3Potter County, PAPA15,897-3.0%−11.2 pts

59▼30Clearfield County, PAPA78,100-3.1%−9.8 pts

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

61▼25Elk County, PAPA29,926-3.4%−4.1 pts

62▼4McKean County, PAPA38,984-3.6%−1.0 pts

63▼2Warren County, PAPA37,038-4.0%−1.4 pts

64▼10Fayette County, PAPA123,021-4.5%−6.8 pts

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

66▼7Greene County, PAPA33,885-5.8%−8.6 pts

67▼1Cameron County, PAPA4,211-7.4%−8.4 pts

SHOWING 1–67 OF 67

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