RANKING · 1990 CENSUS · 88 SHOWN OF 88

Least racially diverse, Ohio counties · 1990

Ohio counties with the lowest CensusEasy Diversity Score, where most residents share the same race or ethnicity (2023 ACS). This list covers the 88 counties in Ohio that qualify, ranked against each other statewide.

Flip the list · Most racially diverse, US counties →

OhioAll states All rankings

SAME RANKING BYCities States Metros ZIP codes

YEAR1990 2000 2010 2020 2024

RANKPLACESTATEPOPDIVERSITY SCOREVS 2000

01Noble County, OHOH14,2761−95%

02Holmes County, OHOH44,9701−65%

03Adams County, OHOH27,8651−37%

04Vinton County, OHOH12,6451−34%

05Monroe County, OHOH12,9942+15%

06Perry County, OHOH35,9182+13%

07Morrow County, OHOH36,3053+4%

08Auglaize County, OHOH45,9093−20%

09Preble County, OHOH40,6643+5%

10Jackson County, OHOH32,8173−19%

11Meigs County, OHOH21,5873−13%

12Crawford County, OHOH41,8963−26%

13Wyandot County, OHOH21,5673−37%

14Brown County, OHOH44,3973−5%

15Carroll County, OHOH26,4754+28%

16Hocking County, OHOH27,5124+10%

17Mercer County, OHOH42,7374+8%

18Tuscarawas County, OHOH92,3734−2%

19Knox County, OHOH64,0024+6%

20Hardin County, OHOH30,0725−4%

21Pike County, OHOH27,0615+13%

22Darke County, OHOH51,5205+31%

23Clermont County, OHOH216,9775−17%

24Coshocton County, OHOH37,1885+0%

25Washington County, OHOH58,3895+8%

26Medina County, OHOH185,0255−15%

27Guernsey County, OHOH38,3795−14%

28Columbiana County, OHOH99,3775−38%

29Geauga County, OHOH95,6765−2%

30Ashland County, OHOH52,5236+15%

31Belmont County, OHOH64,4346−44%

32Fairfield County, OHOH169,7526−42%

33Shelby County, OHOH48,0656−23%

34Clinton County, OHOH42,3017−16%

35Licking County, OHOH185,5647−18%

36Wayne County, OHOH116,7587−5%

37Logan County, OHOH46,3027+3%

38Harrison County, OHOH14,0707+10%

39Highland County, OHOH43,8237+26%

40Lawrence County, OHOH55,7107+4%

41Lake County, OHOH232,2178−30%

42Williams County, OHOH36,5498−18%

43Van Wert County, OHOH29,0138+29%

44Miami County, OHOH112,6348−6%

45Delaware County, OHOH242,0328−32%

46Warren County, OHOH257,1819−28%

47Fayette County, OHOH28,5529−3%

48Huron County, OHOH58,2509−23%

49Champaign County, OHOH38,8209+17%

50Gallia County, OHOH29,07210+11%

51Scioto County, OHOH71,36510+18%

52Portage County, OHOH163,40411−4%

53Morgan County, OHOH13,62612+20%

54Union County, OHOH73,44612+16%

55Muskingum County, OHOH87,01412+4%

56Paulding County, OHOH18,72712+24%

57Hancock County, OHOH75,03413−3%

58Wood County, OHOH134,17613−5%

59Putnam County, OHOH34,38013+17%

60Ashtabula County, OHOH96,71314−1%

61Butler County, OHOH400,12814−26%

62Marion County, OHOH65,11515−16%

63Ottawa County, OHOH39,48115+31%

64Athens County, OHOH63,19715+17%

65Jefferson County, OHOH63,59716−1%

66Seneca County, OHOH54,52216+23%

67Henry County, OHOH27,59817+13%

68Pickaway County, OHOH62,97818+3%

69Fulton County, OHOH41,85318+20%

70Trumbull County, OHOH198,97218−13%

71Ross County, OHOH76,42918+9%

72Stark County, OHOH373,77119−6%

73Madison County, OHOH46,98520+17%

74Richland County, OHOH124,89321−13%

75Erie County, OHOH73,29623−10%

76Clark County, OHOH135,34023−4%

77Greene County, OHOH174,32223+4%

78Sandusky County, OHOH58,65525+11%

79Defiance County, OHOH38,29228+28%

80Allen County, OHOH100,88129−8%

81Summit County, OHOH538,37630−11%

82Lorain County, OHOH323,21935−2%

83Mahoning County, OHOH224,70639−4%

84Franklin County, OHOH1,361,53640−16%

85Montgomery County, OHOH539,59841−10%

86Lucas County, OHOH423,34743−9%

87Hamilton County, OHOH838,41845−11%

88Cuyahoga County, OHOH1,232,92554−8%

SHOWING 1–88 OF 88

Download CSV (full list, 88 rows)How this score is calculated

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