RANKING · 2020 CENSUS · 99 SHOWN OF 99

Most racially diverse, Iowa counties · 2020

Iowa counties ranked by the CensusEasy Diversity Score (0 to 100), the chance two random residents are of a different 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

01Buena Vista County, IAIA20,44975+101%

02Crawford County, IAIA16,23761+170%

03Woodbury County, IAIA106,64960+95%

04Marshall County, IAIA39,89060+144%

05Polk County, IAIA516,54653+91%

06Johnson County, IAIA160,04451+125%

07Muscatine County, IAIA41,85348+63%

08Scott County, IAIA175,25947+72%

09Black Hawk County, IAIA131,53246+83%

10Wapello County, IAIA35,21045+388%

11Tama County, IAIA16,79644+311%

12Louisa County, IAIA10,41643+52%

13Wright County, IAIA12,80143+241%

14Clarke County, IAIA9,57442+283%

15Dallas County, IAIA118,45739+141%

16Franklin County, IAIA9,86838+161%

17Linn County, IAIA232,02838+195%

18Story County, IAIA101,29138+90%

19Sioux County, IAIA36,77435+330%

20Webster County, IAIA36,83832+109%

21Des Moines County, IAIA38,07731+122%

22Pottawattamie County, IAIA92,99631+181%

23Hamilton County, IAIA14,94431+298%

24Osceola County, IAIA5,98029+455%

25Henry County, IAIA19,34929+155%

26Jefferson County, IAIA15,29128+177%

27Emmet County, IAIA9,10728+139%

28Allamakee County, IAIA14,23826+175%

29Floyd County, IAIA14,90126+435%

30Dubuque County, IAIA99,38126+301%

31Cerro Gordo County, IAIA42,37225+141%

32Washington County, IAIA22,66724+203%

33Winnebago County, IAIA10,25123+218%

34Clinton County, IAIA46,00222+148%

35Plymouth County, IAIA25,69721+362%

36O'Brien County, IAIA14,22021+235%

37Page County, IAIA14,85621+129%

38Taylor County, IAIA5,83521+107%

39Lee County, IAIA32,30620+52%

40Hardin County, IAIA16,45520+149%

41Cherokee County, IAIA11,36920+378%

42Pocahontas County, IAIA6,81920+516%

43Hancock County, IAIA10,52819+178%

44Clay County, IAIA16,20219+255%

45Jasper County, IAIA38,15318+226%

46Decatur County, IAIA7,65518+123%

47Poweshiek County, IAIA18,36818+154%

48Mahaska County, IAIA21,88017+202%

49Palo Alto County, IAIA8,89917+508%

50Warren County, IAIA57,33116+274%

51Jones County, IAIA21,25316+113%

52Humboldt County, IAIA9,40916+407%

53Fayette County, IAIA19,04716+169%

54Montgomery County, IAIA10,00216+290%

55Monona County, IAIA8,53916+594%

56Carroll County, IAIA20,30315+499%

57Iowa County, IAIA16,50415+335%

58Calhoun County, IAIA9,56215+243%

59Union County, IAIA11,82915+304%

60Chickasaw County, IAIA11,66315+527%

61Kossuth County, IAIA14,32214+359%

62Mills County, IAIA14,79314+221%

63Boone County, IAIA26,79914+319%

64Shelby County, IAIA11,68914+442%

65Marion County, IAIA34,19214+153%

66Greene County, IAIA8,65814+180%

67Worth County, IAIA7,33814+178%

68Lyon County, IAIA12,35413+831%

69Winneshiek County, IAIA19,73313+149%

70Sac County, IAIA9,52513+285%

71Bremer County, IAIA25,29613+237%

72Guthrie County, IAIA10,78213+281%

73Ida County, IAIA6,77713+513%

74Appanoose County, IAIA12,07712+200%

75Fremont County, IAIA6,52212+105%

76Adair County, IAIA7,40312+368%

77Audubon County, IAIA5,50912+477%

78Benton County, IAIA26,00411+367%

79Wayne County, IAIA6,73811+389%

80Monroe County, IAIA7,40611+310%

81Dickinson County, IAIA18,07711+368%

82Jackson County, IAIA19,28811+450%

83Howard County, IAIA9,41511+416%

84Cedar County, IAIA18,35911+204%

85Harrison County, IAIA14,62311+336%

86Buchanan County, IAIA20,88310+223%

87Madison County, IAIA17,27010+307%

88Delaware County, IAIA17,67410+375%

89Keokuk County, IAIA9,79710+389%

90Clayton County, IAIA16,84510+305%

91Cass County, IAIA12,96010+289%

92Van Buren County, IAIA7,1319+244%

93Lucas County, IAIA8,8479+188%

94Mitchell County, IAIA10,6509+283%

95Adams County, IAIA3,6178+317%

96Ringgold County, IAIA4,6428+510%

97Davis County, IAIA9,2308+182%

98Grundy County, IAIA12,3617+181%

99Butler County, IAIA14,0496+179%

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