RANKING · 2000 CENSUS · 99 SHOWN OF 99

Least racially diverse, Iowa counties · 2000

Iowa counties with the lowest CensusEasy Diversity Score, where most residents share the same race or ethnicity (2023 ACS). This list covers the 99 counties in Iowa that qualify, ranked against each other statewide.

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IowaAll states All rankings

SAME RANKING BYCities States Metros ZIP codes

YEAR1990 2000 2010 2020 2024

RANKPLACESTATEPOPDIVERSITY SCOREVS 2000

01Ringgold County, IAIA4,6421+0%

02Lyon County, IAIA12,3541+0%

03Jackson County, IAIA19,2882+0%

04Adams County, IAIA3,6172+0%

05Audubon County, IAIA5,5092+0%

06Ida County, IAIA6,7772+0%

07Keokuk County, IAIA9,7972+0%

08Howard County, IAIA9,4152+0%

09Delaware County, IAIA17,6742+0%

10Butler County, IAIA14,0492+0%

11Monona County, IAIA8,5392+0%

12Mitchell County, IAIA10,6502+0%

13Wayne County, IAIA6,7382+0%

14Chickasaw County, IAIA11,6632+0%

15Grundy County, IAIA12,3612+0%

16Dickinson County, IAIA18,0772+0%

17Harrison County, IAIA14,6232+0%

18Benton County, IAIA26,0042+0%

19Clayton County, IAIA16,8452+0%

20Adair County, IAIA7,4033+0%

21Madison County, IAIA17,2703+0%

22Cass County, IAIA12,9603+0%

23Carroll County, IAIA20,3033+0%

24Shelby County, IAIA11,6893+0%

25Davis County, IAIA9,2303+0%

26Van Buren County, IAIA7,1313+0%

27Monroe County, IAIA7,4063+0%

28Palo Alto County, IAIA8,8993+0%

29Humboldt County, IAIA9,4093+0%

30Kossuth County, IAIA14,3223+0%

31Buchanan County, IAIA20,8833+0%

32Lucas County, IAIA8,8473+0%

33Pocahontas County, IAIA6,8193+0%

34Guthrie County, IAIA10,7823+0%

35Boone County, IAIA26,7993+0%

36Sac County, IAIA9,5253+0%

37Cedar County, IAIA18,3594+0%

38Iowa County, IAIA16,5044+0%

39Union County, IAIA11,8294+0%

40Bremer County, IAIA25,2964+0%

41Montgomery County, IAIA10,0024+0%

42Appanoose County, IAIA12,0774+0%

43Cherokee County, IAIA11,3694+0%

44Warren County, IAIA57,3314+0%

45Calhoun County, IAIA9,5624+0%

46Mills County, IAIA14,7934+0%

47Plymouth County, IAIA25,6975+0%

48Floyd County, IAIA14,9015+0%

49Worth County, IAIA7,3385+0%

50Greene County, IAIA8,6585+0%

51Osceola County, IAIA5,9805+0%

52Winneshiek County, IAIA19,7335+0%

53Clay County, IAIA16,2025+0%

54Marion County, IAIA34,1926+0%

55Jasper County, IAIA38,1536+0%

56Mahaska County, IAIA21,8806+0%

57Fayette County, IAIA19,0476+0%

58Fremont County, IAIA6,5226+0%

59O'Brien County, IAIA14,2206+0%

60Dubuque County, IAIA99,3816+0%

61Poweshiek County, IAIA18,3687+0%

62Hancock County, IAIA10,5287+0%

63Winnebago County, IAIA10,2517+0%

64Jones County, IAIA21,2537+0%

65Hamilton County, IAIA14,9448+0%

66Washington County, IAIA22,6678+0%

67Decatur County, IAIA7,6558+0%

68Sioux County, IAIA36,7748+0%

69Hardin County, IAIA16,4558+0%

70Clinton County, IAIA46,0029+0%

71Page County, IAIA14,8569+0%

72Wapello County, IAIA35,2109+0%

73Allamakee County, IAIA14,23810+0%

74Taylor County, IAIA5,83510+0%

75Jefferson County, IAIA15,29110+0%

76Cerro Gordo County, IAIA42,37210+0%

77Tama County, IAIA16,79611+0%

78Clarke County, IAIA9,57411+0%

79Pottawattamie County, IAIA92,99611+0%

80Henry County, IAIA19,34911+0%

81Emmet County, IAIA9,10712+0%

82Wright County, IAIA12,80113+0%

83Linn County, IAIA232,02813+0%

84Lee County, IAIA32,30613+0%

85Des Moines County, IAIA38,07714+0%

86Franklin County, IAIA9,86815+0%

87Webster County, IAIA36,83815+0%

88Dallas County, IAIA118,45716+0%

89Story County, IAIA101,29120+0%

90Johnson County, IAIA160,04422+0%

91Crawford County, IAIA16,23723+0%

92Marshall County, IAIA39,89024+0%

93Black Hawk County, IAIA131,53225+0%

94Scott County, IAIA175,25927+0%

95Polk County, IAIA516,54628+0%

96Louisa County, IAIA10,41629+0%

97Muscatine County, IAIA41,85330+0%

98Woodbury County, IAIA106,64931+0%

99Buena Vista County, IAIA20,44937+0%

SHOWING 1–99 OF 99

Download CSV (full list, 99 rows)How this score is calculated

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