RANKING · 2025 ESTIMATES · 88 SHOWN OF 88

Most sparsely populated, Ohio counties

Ohio counties with the fewest residents per square mile (2025). This list covers the 88 counties in Ohio that qualify, ranked against each other statewide. The median across all 88 is 121.

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SAME RANKING BYCities States Metros

RELATEDLargest by population Fastest growing Fastest shrinking Most population gained Most population lost Most densely populated

YEAR1990 2000 2010 2020 2025

RANKPLACESTATEPOPPOPULATION DENSITYVS 2000

01Monroe County, OHOH12,99429−14%

02Vinton County, OHOH12,64531−1%

03Morgan County, OHOH13,62633−9%

04▲1Harrison County, OHOH14,07035−11%

05▼1Noble County, OHOH14,27636+2%

06Paulding County, OHOH18,72745−8%

07Adams County, OHOH27,86548+2%

08Meigs County, OHOH21,58750−6%

09Wyandot County, OHOH21,56753−6%

10Pike County, OHOH27,06161−2%

11Gallia County, OHOH29,07262−6%

12▲1Hardin County, OHOH30,07264−6%

13▲2Hocking County, OHOH27,51265−3%

14▼2Coshocton County, OHOH37,18866+1%

15▼1Henry County, OHOH27,59866−6%

16Carroll County, OHOH26,47567−8%

17▲1Fayette County, OHOH28,552700%

18▼1Van Wert County, OHOH29,01371−2%

19Putnam County, OHOH34,38071−1%

20Guernsey County, OHOH38,37973−6%

21Jackson County, OHOH32,81778+1%

22Highland County, OHOH43,82379+7%

23▲1Darke County, OHOH51,52086−3%

24▲2Williams County, OHOH36,54987−7%

25Perry County, OHOH35,91888+5%

26▼3Morrow County, OHOH36,30589+15%

27▲1Champaign County, OHOH38,820900%

28▼1Brown County, OHOH44,39791+5%

29▲3Washington County, OHOH58,38992−8%

30▼1Mercer County, OHOH42,73792+4%

31▼1Defiance County, OHOH38,29293−3%

32▲1Preble County, OHOH40,66496−4%

33▲1Seneca County, OHOH54,52299−7%

34▼3Madison County, OHOH46,985101+17%

35Logan County, OHOH46,302101+1%

36▲3Fulton County, OHOH41,853103−1%

37▼1Clinton County, OHOH42,301103+4%

38▼1Crawford County, OHOH41,896104−11%

39▼1Holmes County, OHOH44,970106+15%

40Ross County, OHOH76,429111+4%

41Auglaize County, OHOH45,909114−2%

42▲4Scioto County, OHOH71,365117−10%

43Shelby County, OHOH48,0651180%

44Huron County, OHOH58,250118−2%

45▲4Belmont County, OHOH64,434121−8%

46▼1Knox County, OHOH64,002122+17%

47▲3Lawrence County, OHOH55,710123−11%

48Ashland County, OHOH52,5231240%

49▼2Athens County, OHOH63,197125+2%

50▼8Pickaway County, OHOH62,978126+19%

51Muskingum County, OHOH87,014131+3%

52Ashtabula County, OHOH96,713138−6%

53Hancock County, OHOH75,034141+5%

54Sandusky County, OHOH58,655144−5%

55▲1Ottawa County, OHOH39,481155−4%

56▲1Jefferson County, OHOH63,597156−14%

57▲1Marion County, OHOH65,115161−2%

58▲1Tuscarawas County, OHOH92,373163+2%

59▼4Union County, OHOH73,446170+80%

60Columbiana County, OHOH99,377187−11%

61Wayne County, OHOH116,758210+5%

62Wood County, OHOH134,176217+11%

63Geauga County, OHOH95,676239+5%

64▲1Allen County, OHOH100,881251−7%

65▼1Richland County, OHOH124,893252−3%

66Licking County, OHOH185,564272+28%

67Miami County, OHOH112,634277+14%

68Erie County, OHOH73,296292−8%

69▲1Trumbull County, OHOH198,972322−12%

70▲1Portage County, OHOH163,404335+7%

71▼2Fairfield County, OHOH169,752337+38%

72Clark County, OHOH135,340342−6%

73Greene County, OHOH174,322421+18%

74Medina County, OHOH185,025439+22%

75Clermont County, OHOH216,977479+22%

76▲1Mahoning County, OHOH224,706546−13%

77▼1Delaware County, OHOH242,032546+120%

78Warren County, OHOH257,181641+62%

79▲1Stark County, OHOH373,771650−1%

80▼1Lorain County, OHOH323,219659+14%

81Butler County, OHOH400,128858+20%

82Lake County, OHOH232,2171,012+2%

83Montgomery County, OHOH539,5981,170−3%

84Lucas County, OHOH423,3471,246−7%

85Summit County, OHOH538,3761,304−1%

86Hamilton County, OHOH838,4182,068−1%

87Franklin County, OHOH1,361,5362,557+27%

88Cuyahoga County, OHOH1,232,9252,697−12%

SHOWING 1–88 OF 88

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UPDATED 2026-09-11 · DATA: US CENSUS BUREAU POPULATION ESTIMATES