RANKING · 2010 CENSUS · 88 SHOWN OF 88

Youngest by median age, Ohio counties · 2010

Ohio counties with the youngest median age (2010 ACS). This list covers the 88 counties in Ohio that qualify, ranked against each other statewide. The median across all 88 is 39.9.

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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

01Athens County, OHOH63,19726.3+2%

02Holmes County, OHOH44,97029.7+6%

03Franklin County, OHOH1,361,53633.4+3%

04Hardin County, OHOH30,07234.7+4%

05Wood County, OHOH134,17635.3+8%

06Butler County, OHOH400,12836.0+5%

07Union County, OHOH73,44636.4+6%

08Lucas County, OHOH423,34737.0+6%

09Hamilton County, OHOH838,41837.1+5%

10Greene County, OHOH174,32237.2+4%

11Delaware County, OHOH242,03237.4+6%

12Portage County, OHOH163,40437.4+9%

13Warren County, OHOH257,18137.8+7%

14Shelby County, OHOH48,06537.9+9%

15Fairfield County, OHOH169,75238.2+6%

16Allen County, OHOH100,88138.3+6%

17Knox County, OHOH64,00238.3+5%

18Wayne County, OHOH116,75838.3+8%

19Huron County, OHOH58,25038.4+10%

20Clermont County, OHOH216,97738.5+11%

21Hancock County, OHOH75,03438.5+7%

22Pickaway County, OHOH62,97838.5+7%

23Perry County, OHOH35,91838.6+10%

24Clinton County, OHOH42,30138.7+10%

25Scioto County, OHOH71,36538.8+6%

26Seneca County, OHOH54,52238.8+7%

27Jackson County, OHOH32,81739.0+7%

28Putnam County, OHOH34,38039.0+11%

29Madison County, OHOH46,98539.1+9%

30Licking County, OHOH185,56439.1+7%

31Highland County, OHOH43,82339.2+9%

32Montgomery County, OHOH539,59839.2+8%

33Pike County, OHOH27,06139.2+11%

34Ashland County, OHOH52,52339.3+8%

35Defiance County, OHOH38,29239.4+8%

36Fayette County, OHOH28,55239.4+5%

37Mercer County, OHOH42,73739.4+10%

38Morrow County, OHOH36,30539.5+8%

39Muskingum County, OHOH87,01439.5+8%

40Adams County, OHOH27,86539.6+9%

41Vinton County, OHOH12,64539.6+12%

42Champaign County, OHOH38,82039.7+7%

43Henry County, OHOH27,59839.8+9%

44Ross County, OHOH76,42939.8+8%

45Brown County, OHOH44,39739.9+13%

46Fulton County, OHOH41,85339.9+11%

47Gallia County, OHOH29,07239.9+7%

48Marion County, OHOH65,11539.9+7%

49Logan County, OHOH46,30239.9+8%

50Auglaize County, OHOH45,90940.0+10%

51Lorain County, OHOH323,21940.0+10%

52Paulding County, OHOH18,72740.0+10%

53Summit County, OHOH538,37640.0+8%

54Lawrence County, OHOH55,71040.1+7%

55Cuyahoga County, OHOH1,232,92540.2+8%

56Van Wert County, OHOH29,01340.3+7%

57Medina County, OHOH185,02540.4+10%

58Sandusky County, OHOH58,65540.4+8%

59Clark County, OHOH135,34040.5+8%

60Wyandot County, OHOH21,56740.5+8%

61Miami County, OHOH112,63440.6+8%

62Williams County, OHOH36,54940.7+10%

63Coshocton County, OHOH37,18840.8+8%

64Darke County, OHOH51,52040.8+9%

65Guernsey County, OHOH38,37940.9+8%

66Hocking County, OHOH27,51240.9+8%

67Preble County, OHOH40,66440.9+9%

68Richland County, OHOH124,89340.9+8%

69Tuscarawas County, OHOH92,37340.9+8%

70Ashtabula County, OHOH96,71341.0+9%

71Stark County, OHOH373,77141.1+8%

72Meigs County, OHOH21,58741.2+7%

73Crawford County, OHOH41,89641.9+10%

74Columbiana County, OHOH99,37742.3+10%

75Lake County, OHOH232,21742.3+10%

76Morgan County, OHOH13,62642.4+9%

77Trumbull County, OHOH198,97242.8+10%

78Mahoning County, OHOH224,70642.9+8%

79Washington County, OHOH58,38943.0+10%

80Carroll County, OHOH26,47543.1+11%

81Geauga County, OHOH95,67643.3+12%

82Belmont County, OHOH64,43443.4+6%

83Erie County, OHOH73,29643.4+10%

84Jefferson County, OHOH63,59743.9+6%

85Harrison County, OHOH14,07044.4+8%

86Monroe County, OHOH12,99444.7+10%

87Ottawa County, OHOH39,48146.3+13%

88Noble County, OHOH14,27648.6+37%

SHOWING 1–88 OF 88

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UPDATED 2026-09-11 · DATA: US CENSUS BUREAU DECENNIAL CENSUS