RANKING · 2020 CENSUS · 67 SHOWN OF 67

Youngest by median age, Pennsylvania counties · 2020

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, PAPA157,39331.5+10%

02Philadelphia County, PAPA1,574,28134.8+2%

03Lancaster County, PAPA563,15939.3+9%

04Delaware County, PAPA580,93739.4+5%

05Union County, PAPA42,31339.5+10%

06Dauphin County, PAPA293,35139.8+5%

07Lehigh County, PAPA384,38340.1+5%

08Allegheny County, PAPA1,225,03540.2+2%

09Snyder County, PAPA39,65540.3+10%

10Berks County, PAPA440,07240.4+8%

11Chester County, PAPA557,11640.5+10%

12Erie County, PAPA265,83240.6+12%

13Cumberland County, PAPA277,27040.8+7%

14Montgomery County, PAPA877,64341.4+8%

15York County, PAPA473,19741.4+10%

16Clinton County, PAPA37,87041.5+10%

17Indiana County, PAPA82,87841.5+15%

18Columbia County, PAPA66,19341.6+11%

19Lebanon County, PAPA146,38041.8+8%

20Lycoming County, PAPA112,58741.8+9%

21Franklin County, PAPA160,65242.2+10%

22Lackawanna County, PAPA216,50242.6+6%

23Northampton County, PAPA324,41142.6+11%

24Monroe County, PAPA167,17943.2+16%

25Juniata County, PAPA23,40343.2+15%

26Luzerne County, PAPA332,12643.4+6%

27Clarion County, PAPA36,68043.6+20%

28Montour County, PAPA17,86843.6+10%

29Butler County, PAPA200,16943.6+16%

30Greene County, PAPA33,88543.7+14%

31Perry County, PAPA46,80643.7+17%

32McKean County, PAPA38,98444.0+14%

33Mifflin County, PAPA46,12744.0+13%

34Bradford County, PAPA59,60044.1+13%

35Crawford County, PAPA81,79244.2+16%

36Huntingdon County, PAPA43,00144.2+17%

37Blair County, PAPA119,54144.3+12%

38Bucks County, PAPA647,82844.4+18%

39Northumberland County, PAPA89,92044.5+9%

40Adams County, PAPA107,59444.7+21%

41Tioga County, PAPA40,50244.7+16%

42Jefferson County, PAPA43,25545.0+13%

43Mercer County, PAPA107,86045.1+14%

44Washington County, PAPA210,80245.1+11%

45Fulton County, PAPA14,48345.3+19%

46Forest County, PAPA6,61445.4+3%

47Wyoming County, PAPA25,79045.4+20%

48Lawrence County, PAPA83,91145.5+12%

49Beaver County, PAPA166,03245.6+12%

50Schuylkill County, PAPA145,08545.6+11%

51Clearfield County, PAPA78,10045.9+17%

52Cambria County, PAPA128,96846.0+12%

53Fayette County, PAPA123,02146.3+15%

54Carbon County, PAPA65,86846.7+15%

55Somerset County, PAPA72,00447.0+17%

56Armstrong County, PAPA63,69847.3+17%

57Venango County, PAPA49,34647.4+18%

58Bedford County, PAPA47,48047.6+21%

59Westmoreland County, PAPA349,32447.6+15%

60Warren County, PAPA37,03847.8+18%

61Elk County, PAPA29,92648.0+22%

62Susquehanna County, PAPA38,23748.2+22%

63Potter County, PAPA15,89748.6+24%

64Pike County, PAPA62,80848.7+23%

65Wayne County, PAPA51,70349.1+20%

66Cameron County, PAPA4,21151.3+24%

67Sullivan County, PAPA5,85653.2+24%

SHOWING 1–67 OF 67

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