RANKING · 2010 CENSUS · 67 SHOWN OF 67

Youngest by median age, Pennsylvania counties · 2010

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, PAPA1,574,28133.5−2%

03Lancaster County, PAPA563,15938.2+6%

04Indiana County, PAPA82,87838.3+6%

05Clinton County, PAPA37,87038.5+2%

06Union County, PAPA42,31338.5+8%

07Erie County, PAPA265,83238.6+7%

08Delaware County, PAPA580,93738.7+3%

09Berks County, PAPA440,07239.1+5%

10Snyder County, PAPA39,65539.2+7%

11Chester County, PAPA557,11639.3+7%

12Clarion County, PAPA36,68039.4+9%

13Dauphin County, PAPA293,35139.4+4%

14Lehigh County, PAPA384,38339.4+3%

15Columbia County, PAPA66,19339.5+5%

16Franklin County, PAPA160,65240.1+5%

17York County, PAPA473,19740.1+6%

18Cumberland County, PAPA277,27040.3+6%

19Monroe County, PAPA167,17940.3+8%

20Montgomery County, PAPA877,64340.6+6%

21Northampton County, PAPA324,41140.9+6%

22Juniata County, PAPA23,40340.9+8%

23Lebanon County, PAPA146,38041.0+6%

24Greene County, PAPA33,88541.1+8%

25Perry County, PAPA46,80641.1+10%

26Lycoming County, PAPA112,58741.1+7%

27Huntingdon County, PAPA43,00141.2+9%

28Adams County, PAPA107,59441.3+12%

29Allegheny County, PAPA1,225,03541.3+4%

30McKean County, PAPA38,98441.5+7%

31Butler County, PAPA200,16941.5+10%

32Crawford County, PAPA81,79241.7+9%

33Fulton County, PAPA14,48341.8+9%

34Lackawanna County, PAPA216,50241.8+4%

35Blair County, PAPA119,54142.0+6%

36Bucks County, PAPA647,82842.0+11%

37Wyoming County, PAPA25,79042.3+12%

38Tioga County, PAPA40,50242.4+10%

39Mifflin County, PAPA46,12742.5+10%

40Luzerne County, PAPA332,12642.5+4%

41Mercer County, PAPA107,86042.8+8%

42Clearfield County, PAPA78,10042.9+9%

43Forest County, PAPA6,61443.0−3%

44Jefferson County, PAPA43,25543.0+8%

45Schuylkill County, PAPA145,08543.2+6%

46Bradford County, PAPA59,60043.4+12%

47Northumberland County, PAPA89,92043.4+6%

48Washington County, PAPA210,80243.6+7%

49Lawrence County, PAPA83,91143.6+8%

50Fayette County, PAPA123,02143.6+8%

51Pike County, PAPA62,80843.7+10%

52Cambria County, PAPA128,96843.8+6%

53Bedford County, PAPA47,48043.9+11%

54Carbon County, PAPA65,86843.9+8%

55Montour County, PAPA17,86843.9+10%

56Somerset County, PAPA72,00444.3+10%

57Venango County, PAPA49,34644.3+10%

58Beaver County, PAPA166,03244.4+9%

59Armstrong County, PAPA63,69844.5+10%

60Potter County, PAPA15,89744.9+15%

61Elk County, PAPA29,92645.1+14%

62Warren County, PAPA37,03845.1+11%

63Susquehanna County, PAPA38,23745.1+14%

64Westmoreland County, PAPA349,32445.1+9%

65Wayne County, PAPA51,70345.9+13%

66Cameron County, PAPA4,21148.2+17%

67Sullivan County, PAPA5,85649.9+16%

SHOWING 1–67 OF 67

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