RANKING · 2000 CENSUS · 67 SHOWN OF 67

Youngest by median age, Pennsylvania counties · 2000

Pennsylvania counties with the youngest median age (2023 ACS). This list covers the 67 counties in Pennsylvania that qualify, ranked against each other statewide.

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SAME RANKING BYCities States Metros ZIP codes

RELATEDOldest by median age Most foreign-born residents Highest uninsured rate Most women Most men Highest disability rate

YEAR1990 2000 2010 2020 2024

RANKPLACESTATEPOPMEDIAN AGEVS 2000

01Centre County, PAPA157,39328.7+0%

02Philadelphia County, PAPA1,574,28134.2+0%

03Union County, PAPA42,31335.8+0%

04Lancaster County, PAPA563,15936.1+0%

05Erie County, PAPA265,83236.2+0%

06Indiana County, PAPA82,87836.2+0%

07Clarion County, PAPA36,68036.3+0%

08Snyder County, PAPA39,65536.7+0%

09Chester County, PAPA557,11636.9+0%

10Adams County, PAPA107,59437.0+0%

11Monroe County, PAPA167,17937.2+0%

12Berks County, PAPA440,07237.4+0%

13Delaware County, PAPA580,93737.4+0%

14Columbia County, PAPA66,19337.5+0%

15Perry County, PAPA46,80637.5+0%

16Butler County, PAPA200,16937.6+0%

17Bucks County, PAPA647,82837.7+0%

18Huntingdon County, PAPA43,00137.7+0%

19Juniata County, PAPA23,40337.7+0%

20Clinton County, PAPA37,87037.8+0%

21Wyoming County, PAPA25,79037.8+0%

22York County, PAPA473,19737.8+0%

23Dauphin County, PAPA293,35137.9+0%

24Crawford County, PAPA81,79238.1+0%

25Cumberland County, PAPA277,27038.1+0%

26Fulton County, PAPA14,48338.2+0%

27Greene County, PAPA33,88538.2+0%

28Montgomery County, PAPA877,64338.2+0%

29Franklin County, PAPA160,65238.3+0%

30Lehigh County, PAPA384,38338.3+0%

31Lycoming County, PAPA112,58738.4+0%

32Northampton County, PAPA324,41138.5+0%

33Tioga County, PAPA40,50238.5+0%

34McKean County, PAPA38,98438.7+0%

35Lebanon County, PAPA146,38038.7+0%

36Mifflin County, PAPA46,12738.8+0%

37Bradford County, PAPA59,60038.9+0%

38Potter County, PAPA15,89739.1+0%

39Clearfield County, PAPA78,10039.3+0%

40Elk County, PAPA29,92639.4+0%

41Bedford County, PAPA47,48039.5+0%

42Blair County, PAPA119,54139.5+0%

43Susquehanna County, PAPA38,23739.5+0%

44Allegheny County, PAPA1,225,03539.6+0%

45Mercer County, PAPA107,86039.6+0%

46Pike County, PAPA62,80839.6+0%

47Montour County, PAPA17,86839.8+0%

48Jefferson County, PAPA43,25539.8+0%

49Somerset County, PAPA72,00440.2+0%

50Venango County, PAPA49,34640.2+0%

51Fayette County, PAPA123,02140.2+0%

52Lackawanna County, PAPA216,50240.3+0%

53Armstrong County, PAPA63,69840.4+0%

54Warren County, PAPA37,03840.5+0%

55Lawrence County, PAPA83,91140.5+0%

56Carbon County, PAPA65,86840.6+0%

57Beaver County, PAPA166,03240.7+0%

58Northumberland County, PAPA89,92040.8+0%

59Washington County, PAPA210,80240.8+0%

60Wayne County, PAPA51,70340.8+0%

61Luzerne County, PAPA332,12640.8+0%

62Schuylkill County, PAPA145,08540.9+0%

63Cambria County, PAPA128,96841.2+0%

64Cameron County, PAPA4,21141.3+0%

65Westmoreland County, PAPA349,32441.3+0%

66Sullivan County, PAPA5,85643.0+0%

67Forest County, PAPA6,61444.2+0%

SHOWING 1–67 OF 67

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