RANKING · 1990 CENSUS · 67 SHOWN OF 67

Most sparsely populated, Pennsylvania counties · 1990

Pennsylvania counties with the fewest residents per square mile (1990). This list covers the 67 counties in Pennsylvania that qualify, ranked against each other statewide. The median across all 67 is 131.

Flip the list · Most densely populated, US counties →

PennsylvaniaAll states All rankings

SAME RANKING BYCities States Metros

YEAR1990 2000 2010 2020 2025

RANKPLACESTATEPOPPOPULATION DENSITYVS –

01Forest County, PAPA6,61411–

02Sullivan County, PAPA5,85614–

03Cameron County, PAPA4,21115–

04Potter County, PAPA15,89715–

05Fulton County, PAPA14,48332–

06Tioga County, PAPA40,50236–

07Clinton County, PAPA37,87042–

08Elk County, PAPA29,92642–

09Bedford County, PAPA47,48047–

10McKean County, PAPA38,98448–

11Susquehanna County, PAPA38,23749–

12Huntingdon County, PAPA43,00150–

13Warren County, PAPA37,03851–

14Pike County, PAPA62,80851–

15Juniata County, PAPA23,40353–

16Bradford County, PAPA59,60053–

17Wayne County, PAPA51,70355–

18Clearfield County, PAPA78,10068–

19Greene County, PAPA33,88569–

20Clarion County, PAPA36,68069–

21Jefferson County, PAPA43,25571–

22Wyoming County, PAPA25,79071–

23Somerset County, PAPA72,00473–

24Perry County, PAPA46,80675–

25Crawford County, PAPA81,79285–

26Venango County, PAPA49,34688–

27Lycoming County, PAPA112,58797–

28Indiana County, PAPA82,878109–

29Snyder County, PAPA39,655112–

30Centre County, PAPA157,393112–

31Mifflin County, PAPA46,127112–

32Armstrong County, PAPA63,698112–

33Union County, PAPA42,313114–

34Columbia County, PAPA66,193131–

35Montour County, PAPA17,868136–

36Carbon County, PAPA65,868149–

37Adams County, PAPA107,594151–

38Franklin County, PAPA160,652157–

39Monroe County, PAPA167,179157–

40Mercer County, PAPA107,860180–

41Fayette County, PAPA123,021184–

42Butler County, PAPA200,169193–

43Schuylkill County, PAPA145,085196–

44Northumberland County, PAPA89,920211–

45Cambria County, PAPA128,968237–

46Washington County, PAPA210,802239–

47Blair County, PAPA119,541249–

48Lawrence County, PAPA83,911269–

49Lebanon County, PAPA146,380314–

50Erie County, PAPA265,832345–

51Cumberland County, PAPA277,270358–

52Westmoreland County, PAPA349,324360–

53Luzerne County, PAPA332,126369–

54York County, PAPA473,197375–

55Berks County, PAPA440,072393–

56Beaver County, PAPA166,032428–

57Lancaster County, PAPA563,159448–

58Dauphin County, PAPA293,351453–

59Lackawanna County, PAPA216,502477–

60Chester County, PAPA557,116501–

61Northampton County, PAPA324,411668–

62Lehigh County, PAPA384,383843–

63Bucks County, PAPA647,828895–

64Montgomery County, PAPA877,6431,404–

65Allegheny County, PAPA1,225,0351,831–

66Delaware County, PAPA580,9372,979–

67Philadelphia County, PAPA1,574,28111,801–

SHOWING 1–67 OF 67

Download CSV (full list, 67 rows)

UPDATED 2026-09-11 · DATA: US CENSUS BUREAU DECENNIAL CENSUS