RANKING · 1990 CENSUS · 88 SHOWN OF 88

Most sparsely populated, Ohio counties · 1990

Ohio counties with the fewest residents per square mile (2023). This list covers the 88 counties in Ohio that qualify, ranked against each other statewide.

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SAME RANKING BYCities States Metros

RELATEDLargest by population Fastest growing Fastest shrinking Most densely populated Best broadband access Worst broadband access

YEAR1990 2000 2010 2020 2025

RANKPLACESTATEPOPPOPULATION DENSITYVS 2000

01Vinton County, OHOH12,64527−13%

02Noble County, OHOH14,27628−19%

03Monroe County, OHOH12,99434+2%

04Morgan County, OHOH13,62634−5%

05Harrison County, OHOH14,07040+1%

06Adams County, OHOH27,86543−7%

07Paulding County, OHOH18,72749+1%

08Meigs County, OHOH21,58753−0%

09Wyandot County, OHOH21,56755−3%

10Pike County, OHOH27,06155−12%

11Hocking County, OHOH27,51261−10%

12Coshocton County, OHOH37,18863−3%

13Highland County, OHOH43,82365−13%

14Hardin County, OHOH30,07266−3%

15Gallia County, OHOH29,07266−0%

16Carroll County, OHOH26,47567−8%

17Fayette County, OHOH28,55268−3%

18Morrow County, OHOH36,30568−12%

19Henry County, OHOH27,59870−0%

20Putnam County, OHOH34,38070−3%

21Brown County, OHOH44,39771−17%

22Jackson County, OHOH32,81772−7%

23Union County, OHOH73,44674−22%

24Van Wert County, OHOH29,01374+3%

25Guernsey County, OHOH38,37975−4%

26Perry County, OHOH35,91877−7%

27Holmes County, OHOH44,97078−16%

28Madison County, OHOH46,98579−8%

29Champaign County, OHOH38,82084−7%

30Mercer County, OHOH42,73785−4%

31Clinton County, OHOH42,30187−13%

32Williams County, OHOH36,54988−6%

33Darke County, OHOH51,52090+1%

34Knox County, OHOH64,00290−13%

35Logan County, OHOH46,30292−8%

36Preble County, OHOH40,66495−5%

37Fulton County, OHOH41,85395−9%

38Defiance County, OHOH38,29296−0%

39Pickaway County, OHOH62,97896−8%

40Washington County, OHOH58,38999−2%

41Ross County, OHOH76,429101−5%

42Seneca County, OHOH54,522108+2%

43Shelby County, OHOH48,065110−6%

44Auglaize County, OHOH45,909111−4%

45Ashland County, OHOH52,523112−10%

46Huron County, OHOH58,250114−5%

47Athens County, OHOH63,197118−4%

48Crawford County, OHOH41,896119+2%

49Hancock County, OHOH75,034123−8%

50Muskingum County, OHOH87,014123−3%

51Scioto County, OHOH71,365132+1%

52Belmont County, OHOH64,434134+1%

53Lawrence County, OHOH55,710136−1%

54Ashtabula County, OHOH96,713142−3%

55Tuscarawas County, OHOH92,373148−8%

56Delaware County, OHOH242,032151−39%

57Sandusky County, OHOH58,655152+0%

58Ottawa County, OHOH39,481157−2%

59Marion County, OHOH65,115159−3%

60Wayne County, OHOH116,758183−9%

61Wood County, OHOH134,176184−6%

62Licking County, OHOH185,564188−12%

63Jefferson County, OHOH63,597197+9%

64Geauga County, OHOH95,676203−11%

65Columbiana County, OHOH99,377204−3%

66Fairfield County, OHOH169,752205−16%

67Miami County, OHOH112,634229−6%

68Richland County, OHOH124,893255−2%

69Allen County, OHOH100,881273+1%

70Warren County, OHOH257,181284−28%

71Medina County, OHOH185,025290−19%

72Portage County, OHOH163,404293−6%

73Erie County, OHOH73,296306−3%

74Greene County, OHOH174,322331−8%

75Clermont County, OHOH216,977332−16%

76Trumbull County, OHOH198,972369+1%

77Clark County, OHOH135,340373+2%

78Lorain County, OHOH323,219553−5%

79Butler County, OHOH400,128625−12%

80Stark County, OHOH373,771639−3%

81Mahoning County, OHOH224,706644+3%

82Lake County, OHOH232,217939−5%

83Montgomery County, OHOH539,5981,244+3%

84Summit County, OHOH538,3761,248−5%

85Lucas County, OHOH423,3471,361+2%

86Franklin County, OHOH1,361,5361,806−10%

87Hamilton County, OHOH838,4182,136+2%

88Cuyahoga County, OHOH1,232,9253,089+1%

SHOWING 1–88 OF 88

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