RANKING · 2024 ACS · 99 SHOWN OF 99

Most racially diverse, Iowa counties

Iowa counties ranked by the CensusEasy Diversity Score (0 to 100), the chance two random residents are of a different race or ethnicity (2024 ACS). This list covers the 99 counties in Iowa that qualify, ranked against each other statewide. The median across all 99 is 21.

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IowaAll states All rankings

SAME RANKING BYCities States Metros ZIP codes

RELATEDLargest foreign-born population Most residents with a disability Largest veteran population Most uninsured people Largest senior population Most unmarried people

RANKPLACESTATEPOPDIVERSITY SCOREVS 1990

01Buena Vista County, IAIA20,44979+1071%

02Crawford County, IAIA16,23765+1273%

03Woodbury County, IAIA106,64963+256%

04Marshall County, IAIA39,89063+911%

05Polk County, IAIA516,54656+182%

06Johnson County, IAIA160,04453+206%

07Wapello County, IAIA35,21051+782%

08Muscatine County, IAIA41,85350+162%

09Scott County, IAIA175,25949+130%

10Wright County, IAIA12,80149+1565%

11Louisa County, IAIA10,41647+370%

12Black Hawk County, IAIA131,53247+135%

13Clarke County, IAIA9,57446+2126%

14Tama County, IAIA16,79646+220%

15Dallas County, IAIA118,45742+1464%

16Story County, IAIA101,29142+143%

17Franklin County, IAIA9,86841+1511%

18Linn County, IAIA232,02839+326%

19Jefferson County, IAIA15,29139+566%

20Sioux County, IAIA36,77437+1096%

21Webster County, IAIA36,83836+325%

22Hamilton County, IAIA14,94436+924%

23Osceola County, IAIA5,98035+1731%

24Des Moines County, IAIA38,07735+215%

25Pottawattamie County, IAIA92,99634+407%

26Emmet County, IAIA9,10733+1760%

27Henry County, IAIA19,34931+306%

28Allamakee County, IAIA14,23830+3263%

29O'Brien County, IAIA14,22030+1211%

30Plymouth County, IAIA25,69727+2286%

31Dubuque County, IAIA99,38127+650%

32Cerro Gordo County, IAIA42,37227+265%

33Floyd County, IAIA14,90126+978%

34Pocahontas County, IAIA6,81926+1293%

35Cherokee County, IAIA11,36926+727%

36Washington County, IAIA22,66726+617%

37Winnebago County, IAIA10,25126+343%

38Clinton County, IAIA46,00225+336%

39Taylor County, IAIA5,83525+809%

40Poweshiek County, IAIA18,36824+509%

41Hardin County, IAIA16,45523+455%

42Decatur County, IAIA7,65523+589%

43Hancock County, IAIA10,52823+729%

44Lee County, IAIA32,30623+82%

45Page County, IAIA14,85623+463%

46Humboldt County, IAIA9,40922+1761%

47Jasper County, IAIA38,15322+483%

48Fayette County, IAIA19,04721+443%

49Clay County, IAIA16,20221+978%

50Palo Alto County, IAIA8,89921+1396%

51Shelby County, IAIA11,68920+830%

52Calhoun County, IAIA9,56220+743%

53Fremont County, IAIA6,52220+492%

54Jones County, IAIA21,25320+250%

55Ida County, IAIA6,77720+1038%

56Mahaska County, IAIA21,88020+454%

57Kossuth County, IAIA14,32219+1299%

58Union County, IAIA11,82919+620%

59Sac County, IAIA9,52519+969%

60Warren County, IAIA57,33119+489%

61Carroll County, IAIA20,30319+1551%

62Montgomery County, IAIA10,00219+2775%

63Bremer County, IAIA25,29618+541%

64Greene County, IAIA8,65818+675%

65Guthrie County, IAIA10,78218+1255%

66Iowa County, IAIA16,50418+1387%

67Chickasaw County, IAIA11,66318+2429%

68Mills County, IAIA14,79317+858%

69Monona County, IAIA8,53917+705%

70Boone County, IAIA26,79917+598%

71Howard County, IAIA9,41517+1299%

72Adair County, IAIA7,40317+881%

73Cedar County, IAIA18,35916+527%

74Winneshiek County, IAIA19,73316+398%

75Worth County, IAIA7,33816+411%

76Marion County, IAIA34,19216+280%

77Dickinson County, IAIA18,07716+794%

78Lyon County, IAIA12,35416+1122%

79Cass County, IAIA12,96016+677%

80Jackson County, IAIA19,28815+1114%

81Appanoose County, IAIA12,07715+326%

82Wayne County, IAIA6,73815+1220%

83Audubon County, IAIA5,50915+1298%

84Davis County, IAIA9,23015+719%

85Lucas County, IAIA8,84714+455%

86Delaware County, IAIA17,67414+604%

87Madison County, IAIA17,27014+654%

88Van Buren County, IAIA7,13114+1440%

89Harrison County, IAIA14,62313+617%

90Benton County, IAIA26,00413+639%

91Adams County, IAIA3,61713+762%

92Butler County, IAIA14,04913+1253%

93Keokuk County, IAIA9,79713+641%

94Ringgold County, IAIA4,64213+401%

95Monroe County, IAIA7,40613+180%

96Grundy County, IAIA12,36112+834%

97Clayton County, IAIA16,84512+764%

98Buchanan County, IAIA20,88312+477%

99Mitchell County, IAIA10,65012+522%

SHOWING 1–99 OF 99

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

UPDATED 2026-09-11 · DATA: US CENSUS BUREAU ACS 5-YEAR ESTIMATES