RANKING · 1990 CENSUS · 67 SHOWN OF 67

Most sparsely populated, Pennsylvania counties · 1990

Pennsylvania counties with the fewest residents per square mile (2023). This list covers the 67 counties in Pennsylvania that qualify, ranked against each other statewide.

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YEAR1990 2000 2010 2020 2025

RANKPLACESTATEPOPPOPULATION DENSITYVS 2000

01Forest County, PAPA6,61411−3%

02Sullivan County, PAPA5,85614−7%

03Cameron County, PAPA4,21115−1%

04Potter County, PAPA15,89715−8%

05Fulton County, PAPA14,48332−3%

06Tioga County, PAPA40,50236−1%

07Clinton County, PAPA37,87042−2%

08Elk County, PAPA29,92642−1%

09Bedford County, PAPA47,48047−4%

10McKean County, PAPA38,98448+3%

11Susquehanna County, PAPA38,23749−4%

12Huntingdon County, PAPA43,00150−3%

13Warren County, PAPA37,03851+3%

14Pike County, PAPA62,80851−40%

15Juniata County, PAPA23,40353−10%

16Bradford County, PAPA59,60053−3%

17Wayne County, PAPA51,70355−16%

18Clearfield County, PAPA78,10068−6%

19Greene County, PAPA33,88569−3%

20Clarion County, PAPA36,68069−0%

21Jefferson County, PAPA43,25571+0%

22Wyoming County, PAPA25,79071−0%

23Somerset County, PAPA72,00473−2%

24Perry County, PAPA46,80675−6%

25Crawford County, PAPA81,79285−5%

26Venango County, PAPA49,34688+3%

27Lycoming County, PAPA112,58797−1%

28Indiana County, PAPA82,878109+0%

29Snyder County, PAPA39,655112−2%

30Centre County, PAPA157,393112−9%

31Mifflin County, PAPA46,127112−1%

32Armstrong County, PAPA63,698112+2%

33Union County, PAPA42,313114−13%

34Columbia County, PAPA66,193131−1%

35Montour County, PAPA17,868136−3%

36Carbon County, PAPA65,868149−3%

37Adams County, PAPA107,594151−14%

38Franklin County, PAPA160,652157−6%

39Monroe County, PAPA167,179157−31%

40Mercer County, PAPA107,860180+1%

41Fayette County, PAPA123,021184−2%

42Butler County, PAPA200,169193−13%

43Schuylkill County, PAPA145,085196+1%

44Northumberland County, PAPA89,920211+2%

45Cambria County, PAPA128,968237+7%

46Washington County, PAPA210,802239+1%

47Blair County, PAPA119,541249+1%

48Lawrence County, PAPA83,911269+2%

49Lebanon County, PAPA146,380314−5%

50Erie County, PAPA265,832345−2%

51Cumberland County, PAPA277,270358−9%

52Westmoreland County, PAPA349,324360+0%

53Luzerne County, PAPA332,126369+3%

54York County, PAPA473,197375−11%

55Berks County, PAPA440,072393−10%

56Beaver County, PAPA166,032428+3%

57Lancaster County, PAPA563,159448−10%

58Dauphin County, PAPA293,351453−6%

59Lackawanna County, PAPA216,502477+3%

60Chester County, PAPA557,116501−13%

61Northampton County, PAPA324,411668−7%

62Lehigh County, PAPA384,383843−7%

63Bucks County, PAPA647,828895−9%

64Montgomery County, PAPA877,6431,404−10%

65Allegheny County, PAPA1,225,0351,831+4%

66Delaware County, PAPA580,9372,979−1%

67Philadelphia County, PAPA1,574,28111,801+4%

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