RANKING · 2024 ACS · 67 SHOWN OF 67

Youngest by median age, Pennsylvania counties

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, PAPA157,39334.2+19%

02Philadelphia County, PAPA1,574,28135.3+3%

03Delaware County, PAPA580,93739.1+5%

04Lancaster County, PAPA563,15939.4+9%

05Dauphin County, PAPA293,35139.4+4%

06Lehigh County, PAPA384,38339.6+3%

07Clinton County, PAPA37,87039.8+5%

08Berks County, PAPA440,07239.9+7%

09Indiana County, PAPA82,87840.0+10%

10Cumberland County, PAPA277,27040.2+6%

11Erie County, PAPA265,83240.2+11%

12Allegheny County, PAPA1,225,03540.6+3%

13Snyder County, PAPA39,65540.6+11%

14Chester County, PAPA557,11640.8+11%

15Columbia County, PAPA66,19341.0+9%

16Union County, PAPA42,31341.0+15%

17Lebanon County, PAPA146,38041.1+6%

18York County, PAPA473,19741.1+9%

19Montgomery County, PAPA877,64341.2+8%

20Lycoming County, PAPA112,58741.4+8%

21Clarion County, PAPA36,68041.7+15%

22Lackawanna County, PAPA216,50241.9+4%

23Northampton County, PAPA324,41142.0+9%

24Luzerne County, PAPA332,12642.0+3%

25Franklin County, PAPA160,65242.1+10%

26Montour County, PAPA17,86842.9+8%

27Blair County, PAPA119,54143.1+9%

28Greene County, PAPA33,88543.3+13%

29Juniata County, PAPA23,40343.3+15%

30Mifflin County, PAPA46,12743.4+12%

31Butler County, PAPA200,16943.4+15%

32Bradford County, PAPA59,60043.6+12%

33Adams County, PAPA107,59443.7+18%

34Schuylkill County, PAPA145,08543.7+7%

35Perry County, PAPA46,80643.8+17%

36Crawford County, PAPA81,79244.0+15%

37Huntingdon County, PAPA43,00144.0+17%

38McKean County, PAPA38,98444.0+14%

39Jefferson County, PAPA43,25544.0+11%

40Monroe County, PAPA167,17944.1+19%

41Bucks County, PAPA647,82844.2+17%

42Washington County, PAPA210,80244.2+8%

43Northumberland County, PAPA89,92044.5+9%

44Beaver County, PAPA166,03244.7+10%

45Lawrence County, PAPA83,91144.9+11%

46Mercer County, PAPA107,86045.1+14%

47Tioga County, PAPA40,50245.1+17%

48Wyoming County, PAPA25,79045.1+19%

49Clearfield County, PAPA78,10045.4+16%

50Fayette County, PAPA123,02145.4+13%

51Cambria County, PAPA128,96845.6+11%

52Fulton County, PAPA14,48346.1+21%

53Carbon County, PAPA65,86846.3+14%

54Somerset County, PAPA72,00446.9+17%

55Warren County, PAPA37,03847.1+16%

56Armstrong County, PAPA63,69847.2+17%

57Westmoreland County, PAPA349,32447.2+14%

58Bedford County, PAPA47,48047.5+20%

59Venango County, PAPA49,34647.6+18%

60Elk County, PAPA29,92648.4+23%

61Potter County, PAPA15,89748.4+24%

62Susquehanna County, PAPA38,23748.6+23%

63Forest County, PAPA6,61448.7+10%

64Wayne County, PAPA51,70349.2+21%

65Pike County, PAPA62,80849.4+25%

66Cameron County, PAPA4,21153.0+28%

67Sullivan County, PAPA5,85655.9+30%

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