RANKING · 2020 CENSUS · 88 SHOWN OF 88

Youngest by median age, Ohio counties · 2020

Ohio counties with the youngest median age (2020 ACS). This list covers the 88 counties in Ohio that qualify, ranked against each other statewide. The median across all 88 is 41.4.

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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, OHOH63,19729.5+15%

02Holmes County, OHOH44,97031.1+11%

03Franklin County, OHOH1,361,53634.2+5%

04Wood County, OHOH134,17636.8+13%

05Hamilton County, OHOH838,41836.9+4%

06Hardin County, OHOH30,07237.2+12%

07Butler County, OHOH400,12837.4+9%

08Union County, OHOH73,44638.0+10%

09Greene County, OHOH174,32238.1+7%

10Lucas County, OHOH423,34738.9+11%

11Wayne County, OHOH116,75839.0+10%

12Mercer County, OHOH42,73739.1+10%

13Delaware County, OHOH242,03239.4+12%

14Montgomery County, OHOH539,59839.6+9%

15Fairfield County, OHOH169,75239.7+10%

16Knox County, OHOH64,00239.7+9%

17Portage County, OHOH163,40439.8+16%

18Warren County, OHOH257,18140.0+14%

19Allen County, OHOH100,88140.2+11%

20Putnam County, OHOH34,38040.2+15%

21Shelby County, OHOH48,06540.2+16%

22Hancock County, OHOH75,03440.3+12%

23Pickaway County, OHOH62,97840.3+12%

24Noble County, OHOH14,27640.4+14%

25Licking County, OHOH185,56440.4+10%

26Cuyahoga County, OHOH1,232,92540.5+9%

27Seneca County, OHOH54,52240.6+12%

28Clermont County, OHOH216,97740.7+17%

29Jackson County, OHOH32,81740.8+12%

30Clinton County, OHOH42,30140.9+16%

31Huron County, OHOH58,25041.0+17%

32Muskingum County, OHOH87,01441.0+12%

33Perry County, OHOH35,91841.0+17%

34Van Wert County, OHOH29,01341.0+9%

35Madison County, OHOH46,98541.1+15%

36Coshocton County, OHOH37,18841.2+9%

37Marion County, OHOH65,11541.2+11%

38Pike County, OHOH27,06141.2+17%

39Scioto County, OHOH71,36541.2+12%

40Auglaize County, OHOH45,90941.3+13%

41Highland County, OHOH43,82341.3+14%

42Miami County, OHOH112,63441.3+10%

43Paulding County, OHOH18,72741.3+13%

44Defiance County, OHOH38,29241.4+13%

45Ross County, OHOH76,42941.4+12%

46Ashland County, OHOH52,52341.5+14%

47Fayette County, OHOH28,55241.5+11%

48Gallia County, OHOH29,07241.5+11%

49Tuscarawas County, OHOH92,37341.6+10%

50Summit County, OHOH538,37641.6+12%

51Richland County, OHOH124,89341.7+11%

52Fulton County, OHOH41,85341.8+16%

53Clark County, OHOH135,34042.0+12%

54Adams County, OHOH27,86542.2+16%

55Stark County, OHOH373,77142.2+10%

56Henry County, OHOH27,59842.3+16%

57Williams County, OHOH36,54942.3+15%

58Darke County, OHOH51,52042.5+14%

59Champaign County, OHOH38,82042.6+15%

60Lorain County, OHOH323,21942.6+17%

61Morrow County, OHOH36,30542.7+17%

62Logan County, OHOH46,30242.9+16%

63Brown County, OHOH44,39743.1+22%

64Lawrence County, OHOH55,71043.1+15%

65Medina County, OHOH185,02543.1+18%

66Guernsey County, OHOH38,37943.2+15%

67Sandusky County, OHOH58,65543.2+16%

68Preble County, OHOH40,66443.4+16%

69Wyandot County, OHOH21,56743.5+16%

70Ashtabula County, OHOH96,71343.6+16%

71Hocking County, OHOH27,51243.6+16%

72Vinton County, OHOH12,64543.6+23%

73Mahoning County, OHOH224,70644.2+11%

74Washington County, OHOH58,38944.3+13%

75Crawford County, OHOH41,89644.5+16%

76Meigs County, OHOH21,58744.6+16%

77Jefferson County, OHOH63,59744.6+7%

78Lake County, OHOH232,21744.7+16%

79Trumbull County, OHOH198,97244.9+15%

80Columbiana County, OHOH99,37745.1+17%

81Belmont County, OHOH64,43445.2+11%

82Morgan County, OHOH13,62645.7+17%

83Geauga County, OHOH95,67645.8+18%

84Erie County, OHOH73,29646.1+17%

85Carroll County, OHOH26,47546.2+19%

86Harrison County, OHOH14,07046.6+13%

87Monroe County, OHOH12,99447.4+16%

88Ottawa County, OHOH39,48150.0+22%

SHOWING 1–88 OF 88

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