RANKING · 1990 CENSUS · 67 SHOWN OF 67

Youngest by median age, Pennsylvania counties · 1990

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, PAPA157,39327.0−6%

02Indiana County, PAPA82,87831.9−12%

03Clarion County, PAPA36,68032.3−11%

04Union County, PAPA42,31332.5−9%

05Snyder County, PAPA39,65532.6−11%

06Lancaster County, PAPA563,15932.8−9%

07Erie County, PAPA265,83233.0−9%

08Wyoming County, PAPA25,79033.1−12%

09Philadelphia County, PAPA1,574,28133.4−2%

10Adams County, PAPA107,59433.5−9%

11Perry County, PAPA46,80633.5−11%

12Bucks County, PAPA647,82833.8−10%

13Chester County, PAPA557,11633.9−8%

14Butler County, PAPA200,16934.0−10%

15Columbia County, PAPA66,19334.1−9%

16Monroe County, PAPA167,17934.1−8%

17Fulton County, PAPA14,48334.1−11%

18Tioga County, PAPA40,50234.2−11%

19Huntingdon County, PAPA43,00134.3−9%

20York County, PAPA473,19734.5−9%

21Cumberland County, PAPA277,27034.6−9%

22Crawford County, PAPA81,79234.6−9%

23Delaware County, PAPA580,93734.6−7%

24Juniata County, PAPA23,40334.6−8%

25Bradford County, PAPA59,60034.6−11%

26Lycoming County, PAPA112,58734.8−9%

27Clinton County, PAPA37,87034.8−8%

28Susquehanna County, PAPA38,23734.9−12%

29Northampton County, PAPA324,41134.9−9%

30Dauphin County, PAPA293,35135.0−8%

31Lebanon County, PAPA146,38035.1−9%

32Franklin County, PAPA160,65235.1−8%

33Greene County, PAPA33,88535.2−8%

34Montour County, PAPA17,86835.2−11%

35Elk County, PAPA29,92635.4−10%

36Berks County, PAPA440,07235.5−5%

37Bedford County, PAPA47,48035.6−10%

38Clearfield County, PAPA78,10035.6−9%

39Mifflin County, PAPA46,12735.7−8%

40Lehigh County, PAPA384,38335.7−7%

41Potter County, PAPA15,89735.7−9%

42Jefferson County, PAPA43,25535.8−10%

43Venango County, PAPA49,34635.8−11%

44Montgomery County, PAPA877,64335.9−6%

45Pike County, PAPA62,80835.9−9%

46McKean County, PAPA38,98435.9−7%

47Blair County, PAPA119,54136.2−8%

48Wayne County, PAPA51,70336.3−11%

49Mercer County, PAPA107,86036.3−8%

50Somerset County, PAPA72,00436.3−10%

51Warren County, PAPA37,03836.4−10%

52Armstrong County, PAPA63,69836.5−10%

53Allegheny County, PAPA1,225,03536.8−7%

54Fayette County, PAPA123,02137.0−8%

55Beaver County, PAPA166,03237.2−9%

56Lawrence County, PAPA83,91137.3−8%

57Carbon County, PAPA65,86837.4−8%

58Cambria County, PAPA128,96837.4−9%

59Washington County, PAPA210,80237.5−8%

60Cameron County, PAPA4,21137.6−9%

61Westmoreland County, PAPA349,32437.7−9%

62Lackawanna County, PAPA216,50237.8−6%

63Northumberland County, PAPA89,92037.8−7%

64Sullivan County, PAPA5,85638.0−12%

65Luzerne County, PAPA332,12638.2−6%

66Schuylkill County, PAPA145,08538.6−6%

67Forest County, PAPA6,61440.8−8%

SHOWING 1–67 OF 67

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