RANKING · 2024 ACS · 67 SHOWN OF 67

Youngest by median age, Pennsylvania counties

Pennsylvania counties with the youngest median age (2024 ACS). This list covers the 67 counties in Pennsylvania that qualify, ranked against each other statewide. The median across all 67 is 43.7. Biggest climber in the top 100 since 2020: Schuylkill County, PA, up 16 places to #34.

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SAME RANKING BYCities States Metros ZIP codes

RELATEDLargest foreign-born population Most residents with a disability Largest veteran population Most uninsured people Largest senior population Most unmarried people

YEAR1990 2000 2010 2020 2024

RANKPLACESTATEPOPMEDIAN AGEVS 2000

01Centre County, PAPA157,39334.2+19%

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

03▲1Delaware County, PAPA580,93739.1+5%

04▼1Lancaster County, PAPA563,15939.4+9%

05▲1Dauphin County, PAPA293,35139.4+4%

06▲1Lehigh County, PAPA384,38339.6+3%

07▲9Clinton County, PAPA37,87039.8+5%

08▲2Berks County, PAPA440,07239.9+7%

09▲8Indiana County, PAPA82,87840.0+10%

10▲3Cumberland County, PAPA277,27040.2+6%

11▲1Erie County, PAPA265,83240.2+11%

12▼4Allegheny County, PAPA1,225,03540.6+3%

13▼4Snyder County, PAPA39,65540.6+11%

14▼3Chester County, PAPA557,11640.8+11%

15▲3Columbia County, PAPA66,19341.0+9%

16▼11Union County, PAPA42,31341.0+15%

17▲2Lebanon County, PAPA146,38041.1+6%

18▼3York County, PAPA473,19741.1+9%

19▼5Montgomery County, PAPA877,64341.2+8%

20Lycoming County, PAPA112,58741.4+8%

21▲6Clarion County, PAPA36,68041.7+15%

22Lackawanna County, PAPA216,50241.9+4%

23Northampton County, PAPA324,41142.0+9%

24▲2Luzerne County, PAPA332,12642.0+3%

25▼4Franklin County, PAPA160,65242.1+10%

26▲2Montour County, PAPA17,86842.9+8%

27▲10Blair County, PAPA119,54143.1+9%

28▲2Greene County, PAPA33,88543.3+13%

29▼4Juniata County, PAPA23,40343.3+15%

30▲3Mifflin County, PAPA46,12743.4+12%

31▼2Butler County, PAPA200,16943.4+15%

32▲2Bradford County, PAPA59,60043.6+12%

33▲7Adams County, PAPA107,59443.7+18%

34▲16Schuylkill County, PAPA145,08543.7+7%

35▼4Perry County, PAPA46,80643.8+17%

36▼1Crawford County, PAPA81,79244.0+15%

37▼1Huntingdon County, PAPA43,00144.0+17%

38▼6McKean County, PAPA38,98444.0+14%

39▲3Jefferson County, PAPA43,25544.0+11%

40▼16Monroe County, PAPA167,17944.1+19%

41▼3Bucks County, PAPA647,82844.2+17%

42▲2Washington County, PAPA210,80244.2+8%

43▼4Northumberland County, PAPA89,92044.5+9%

44▲5Beaver County, PAPA166,03244.7+10%

45▲3Lawrence County, PAPA83,91144.9+11%

46▼3Mercer County, PAPA107,86045.1+14%

47▼6Tioga County, PAPA40,50245.1+17%

48▼1Wyoming County, PAPA25,79045.1+19%

49▲2Clearfield County, PAPA78,10045.4+16%

50▲3Fayette County, PAPA123,02145.4+13%

51▲1Cambria County, PAPA128,96845.6+11%

52▼7Fulton County, PAPA14,48346.1+21%

53▲1Carbon County, PAPA65,86846.3+14%

54▲1Somerset County, PAPA72,00446.9+17%

55▲5Warren County, PAPA37,03847.1+16%

56Armstrong County, PAPA63,69847.2+17%

57▲2Westmoreland County, PAPA349,32447.2+14%

58Bedford County, PAPA47,48047.5+20%

59▼2Venango County, PAPA49,34647.6+18%

60▲1Elk County, PAPA29,92648.4+23%

61▲2Potter County, PAPA15,89748.4+24%

62Susquehanna County, PAPA38,23748.6+23%

63▼17Forest County, PAPA6,61448.7+10%

64▲1Wayne County, PAPA51,70349.2+21%

65▼1Pike County, PAPA62,80849.4+25%

66Cameron County, PAPA4,21153.0+28%

67Sullivan County, PAPA5,85655.9+30%

SHOWING 1–67 OF 67

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UPDATED 2026-09-11 · DATA: US CENSUS BUREAU ACS 5-YEAR ESTIMATES