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.

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

RANKPLACESTATEPOPPOPULATION DENSITYVS –

01Monroe County, OHOH12,99429–

02Vinton County, OHOH12,64531–

03Morgan County, OHOH13,62633–

04Harrison County, OHOH14,07035–

05Noble County, OHOH14,27636–

06Paulding County, OHOH18,72745–

07Adams County, OHOH27,86548–

08Meigs County, OHOH21,58750–

09Wyandot County, OHOH21,56753–

10Pike County, OHOH27,06161–

11Gallia County, OHOH29,07262–

12Hardin County, OHOH30,07264–

13Hocking County, OHOH27,51265–

14Coshocton County, OHOH37,18866–

15Henry County, OHOH27,59866–

16Carroll County, OHOH26,47567–

17Fayette County, OHOH28,55270–

18Van Wert County, OHOH29,01371–

19Putnam County, OHOH34,38071–

20Guernsey County, OHOH38,37973–

21Jackson County, OHOH32,81778–

22Highland County, OHOH43,82379–

23Darke County, OHOH51,52086–

24Williams County, OHOH36,54987–

25Perry County, OHOH35,91888–

26Morrow County, OHOH36,30589–

27Champaign County, OHOH38,82090–

28Brown County, OHOH44,39791–

29Washington County, OHOH58,38992–

30Mercer County, OHOH42,73792–

31Defiance County, OHOH38,29293–

32Preble County, OHOH40,66496–

33Seneca County, OHOH54,52299–

34Madison County, OHOH46,985101–

35Logan County, OHOH46,302101–

36Fulton County, OHOH41,853103–

37Clinton County, OHOH42,301103–

38Crawford County, OHOH41,896104–

39Holmes County, OHOH44,970106–

40Ross County, OHOH76,429111–

41Auglaize County, OHOH45,909114–

42Scioto County, OHOH71,365117–

43Shelby County, OHOH48,065118–

44Huron County, OHOH58,250118–

45Belmont County, OHOH64,434121–

46Knox County, OHOH64,002122–

47Lawrence County, OHOH55,710123–

48Ashland County, OHOH52,523124–

49Athens County, OHOH63,197125–

50Pickaway County, OHOH62,978126–

51Muskingum County, OHOH87,014131–

52Ashtabula County, OHOH96,713138–

53Hancock County, OHOH75,034141–

54Sandusky County, OHOH58,655144–

55Ottawa County, OHOH39,481155–

56Jefferson County, OHOH63,597156–

57Marion County, OHOH65,115161–

58Tuscarawas County, OHOH92,373163–

59Union County, OHOH73,446170–

60Columbiana County, OHOH99,377187–

61Wayne County, OHOH116,758210–

62Wood County, OHOH134,176217–

63Geauga County, OHOH95,676239–

64Allen County, OHOH100,881251–

65Richland County, OHOH124,893252–

66Licking County, OHOH185,564272–

67Miami County, OHOH112,634277–

68Erie County, OHOH73,296292–

69Trumbull County, OHOH198,972322–

70Portage County, OHOH163,404335–

71Fairfield County, OHOH169,752337–

72Clark County, OHOH135,340342–

73Greene County, OHOH174,322421–

74Medina County, OHOH185,025439–

75Clermont County, OHOH216,977479–

76Mahoning County, OHOH224,706546–

77Delaware County, OHOH242,032546–

78Warren County, OHOH257,181641–

79Stark County, OHOH373,771650–

80Lorain County, OHOH323,219659–

81Butler County, OHOH400,128858–

82Lake County, OHOH232,2171,012–

83Montgomery County, OHOH539,5981,170–

84Lucas County, OHOH423,3471,246–

85Summit County, OHOH538,3761,304–

86Hamilton County, OHOH838,4182,068–

87Franklin County, OHOH1,361,5362,557–

88Cuyahoga County, OHOH1,232,9252,697–

SHOWING 1–88 OF 88

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UPDATED 2026-07-15 · DATA: US CENSUS BUREAU POPULATION ESTIMATES