RANKING · 2020 CENSUS · 88 SHOWN OF 88

Oldest by median age, Ohio counties · 2020

Ohio counties ranked by median age of residents (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

01Ottawa County, OHOH39,48150.0+22%

02Monroe County, OHOH12,99447.4+16%

03Harrison County, OHOH14,07046.6+13%

04Carroll County, OHOH26,47546.2+19%

05Erie County, OHOH73,29646.1+17%

06Geauga County, OHOH95,67645.8+18%

07Morgan County, OHOH13,62645.7+17%

08Belmont County, OHOH64,43445.2+11%

09Columbiana County, OHOH99,37745.1+17%

10Trumbull County, OHOH198,97244.9+15%

11Lake County, OHOH232,21744.7+16%

12Meigs County, OHOH21,58744.6+16%

13Jefferson County, OHOH63,59744.6+7%

14Crawford County, OHOH41,89644.5+16%

15Washington County, OHOH58,38944.3+13%

16Mahoning County, OHOH224,70644.2+11%

17Ashtabula County, OHOH96,71343.6+16%

18Hocking County, OHOH27,51243.6+16%

19Vinton County, OHOH12,64543.6+23%

20Wyandot County, OHOH21,56743.5+16%

21Preble County, OHOH40,66443.4+16%

22Guernsey County, OHOH38,37943.2+15%

23Sandusky County, OHOH58,65543.2+16%

24Brown County, OHOH44,39743.1+22%

25Lawrence County, OHOH55,71043.1+15%

26Medina County, OHOH185,02543.1+18%

27Logan County, OHOH46,30242.9+16%

28Morrow County, OHOH36,30542.7+17%

29Champaign County, OHOH38,82042.6+15%

30Lorain County, OHOH323,21942.6+17%

31Darke County, OHOH51,52042.5+14%

32Henry County, OHOH27,59842.3+16%

33Williams County, OHOH36,54942.3+15%

34Adams County, OHOH27,86542.2+16%

35Stark County, OHOH373,77142.2+10%

36Clark County, OHOH135,34042.0+12%

37Fulton County, OHOH41,85341.8+16%

38Richland County, OHOH124,89341.7+11%

39Tuscarawas County, OHOH92,37341.6+10%

40Summit County, OHOH538,37641.6+12%

41Ashland County, OHOH52,52341.5+14%

42Fayette County, OHOH28,55241.5+11%

43Gallia County, OHOH29,07241.5+11%

44Defiance County, OHOH38,29241.4+13%

45Ross County, OHOH76,42941.4+12%

46Auglaize County, OHOH45,90941.3+13%

47Highland County, OHOH43,82341.3+14%

48Miami County, OHOH112,63441.3+10%

49Paulding County, OHOH18,72741.3+13%

50Coshocton County, OHOH37,18841.2+9%

51Marion County, OHOH65,11541.2+11%

52Pike County, OHOH27,06141.2+17%

53Scioto County, OHOH71,36541.2+12%

54Madison County, OHOH46,98541.1+15%

55Huron County, OHOH58,25041.0+17%

56Muskingum County, OHOH87,01441.0+12%

57Perry County, OHOH35,91841.0+17%

58Van Wert County, OHOH29,01341.0+9%

59Clinton County, OHOH42,30140.9+16%

60Jackson County, OHOH32,81740.8+12%

61Clermont County, OHOH216,97740.7+17%

62Seneca County, OHOH54,52240.6+12%

63Cuyahoga County, OHOH1,232,92540.5+9%

64Noble County, OHOH14,27640.4+14%

65Licking County, OHOH185,56440.4+10%

66Hancock County, OHOH75,03440.3+12%

67Pickaway County, OHOH62,97840.3+12%

68Allen County, OHOH100,88140.2+11%

69Putnam County, OHOH34,38040.2+15%

70Shelby County, OHOH48,06540.2+16%

71Warren County, OHOH257,18140.0+14%

72Portage County, OHOH163,40439.8+16%

73Fairfield County, OHOH169,75239.7+10%

74Knox County, OHOH64,00239.7+9%

75Montgomery County, OHOH539,59839.6+9%

76Delaware County, OHOH242,03239.4+12%

77Mercer County, OHOH42,73739.1+10%

78Wayne County, OHOH116,75839.0+10%

79Lucas County, OHOH423,34738.9+11%

80Greene County, OHOH174,32238.1+7%

81Union County, OHOH73,44638.0+10%

82Butler County, OHOH400,12837.4+9%

83Hardin County, OHOH30,07237.2+12%

84Hamilton County, OHOH838,41836.9+4%

85Wood County, OHOH134,17636.8+13%

86Franklin County, OHOH1,361,53634.2+5%

87Holmes County, OHOH44,97031.1+11%

88Athens County, OHOH63,19729.5+15%

SHOWING 1–88 OF 88

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