RANKING · 2020 CENSUS · 88 SHOWN OF 88

Most sparsely populated, Ohio counties · 2020

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

01Monroe County, OHOH12,99429−12%

02Vinton County, OHOH12,64531−0%

03Morgan County, OHOH13,62633−7%

04Noble County, OHOH14,27635+0%

05Harrison County, OHOH14,07036−9%

06Paulding County, OHOH18,72745−7%

07Adams County, OHOH27,86547+1%

08Meigs County, OHOH21,58752−4%

09Wyandot County, OHOH21,56754−4%

10Pike County, OHOH27,06162−2%

11Gallia County, OHOH29,07263−6%

12Coshocton County, OHOH37,18865−0%

13Hardin County, OHOH30,07265−4%

14Henry County, OHOH27,59866−5%

15Hocking County, OHOH27,51267−1%

16Carroll County, OHOH26,47568−7%

17Van Wert County, OHOH29,01371−2%

18Fayette County, OHOH28,55271+2%

19Putnam County, OHOH34,38071−1%

20Guernsey County, OHOH38,37974−6%

21Jackson County, OHOH32,81778+0%

22Highland County, OHOH43,82378+6%

23Morrow County, OHOH36,30586+11%

24Darke County, OHOH51,52087−3%

25Perry County, OHOH35,91887+4%

26Williams County, OHOH36,54988−5%

27Brown County, OHOH44,39789+3%

28Champaign County, OHOH38,82090−0%

29Mercer County, OHOH42,73792+4%

30Defiance County, OHOH38,29293−3%

31Madison County, OHOH46,98594+9%

32Washington County, OHOH58,38995−6%

33Preble County, OHOH40,66497−3%

34Seneca County, OHOH54,522100−6%

35Logan County, OHOH46,302101+0%

36Clinton County, OHOH42,301103+4%

37Crawford County, OHOH41,896105−11%

38Holmes County, OHOH44,970105+14%

39Fulton County, OHOH41,853105+1%

40Ross County, OHOH76,429112+5%

41Auglaize County, OHOH45,909116−0%

42Pickaway County, OHOH62,978117+11%

43Shelby County, OHOH48,065118+1%

44Huron County, OHOH58,250119−2%

45Knox County, OHOH64,002119+15%

46Scioto County, OHOH71,365121−7%

47Athens County, OHOH63,197124+0%

48Ashland County, OHOH52,523124−0%

49Belmont County, OHOH64,434125−5%

50Lawrence County, OHOH55,710128−7%

51Muskingum County, OHOH87,014130+2%

52Ashtabula County, OHOH96,713139−5%

53Hancock County, OHOH75,034141+5%

54Sandusky County, OHOH58,655144−5%

55Union County, OHOH73,446145+53%

56Ottawa County, OHOH39,481158−2%

57Jefferson County, OHOH63,597160−12%

58Marion County, OHOH65,115162−1%

59Tuscarawas County, OHOH92,373164+3%

60Columbiana County, OHOH99,377192−9%

61Wayne County, OHOH116,758211+5%

62Wood County, OHOH134,176214+9%

63Geauga County, OHOH95,676238+5%

64Richland County, OHOH124,893252−3%

65Allen County, OHOH100,881254−6%

66Licking County, OHOH185,564262+23%

67Miami County, OHOH112,634268+10%

68Erie County, OHOH73,296301−5%

69Fairfield County, OHOH169,752315+29%

70Trumbull County, OHOH198,972327−10%

71Portage County, OHOH163,404332+6%

72Clark County, OHOH135,340344−6%

73Greene County, OHOH174,322406+14%

74Medina County, OHOH185,025433+21%

75Clermont County, OHOH216,977461+17%

76Delaware County, OHOH242,032483+95%

77Mahoning County, OHOH224,706556−11%

78Warren County, OHOH257,181604+53%

79Lorain County, OHOH323,219638+10%

80Stark County, OHOH373,771652−1%

81Butler County, OHOH400,128837+17%

82Lake County, OHOH232,2171,014+2%

83Montgomery County, OHOH539,5981,165−4%

84Lucas County, OHOH423,3471,270−5%

85Summit County, OHOH538,3761,309−0%

86Hamilton County, OHOH838,4182,049−2%

87Franklin County, OHOH1,361,5362,486+24%

88Cuyahoga County, OHOH1,232,9252,766−9%

SHOWING 1–88 OF 88

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