RANKING · 1990 CENSUS · 99 SHOWN OF 99

Most racially diverse, Iowa counties · 1990

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

01Muscatine County, IAIA41,85326−12%

02Scott County, IAIA175,25923−13%

03Polk County, IAIA516,54621−23%

04Woodbury County, IAIA106,64921−33%

05Black Hawk County, IAIA131,53220−18%

06Johnson County, IAIA160,04418−19%

07Story County, IAIA101,29118−10%

08Tama County, IAIA16,79615+37%

09Lee County, IAIA32,30614+5%

10Louisa County, IAIA10,41614−51%

11Des Moines County, IAIA38,07712−14%

12Linn County, IAIA232,02810−25%

13Webster County, IAIA36,8389−40%

14Henry County, IAIA19,3499−24%

15Cerro Gordo County, IAIA42,3729−18%

16Pottawattamie County, IAIA92,9968−28%

17Buena Vista County, IAIA20,4497−80%

18Marshall County, IAIA39,8907−71%

19Jones County, IAIA21,2537−13%

20Wapello County, IAIA35,2106−31%

21Clinton County, IAIA46,0026−31%

22Winnebago County, IAIA10,2516−15%

23Jefferson County, IAIA15,2916−41%

24Fremont County, IAIA6,5225−17%

25Crawford County, IAIA16,2375−78%

26Hardin County, IAIA16,4555−40%

27Fayette County, IAIA19,0475−23%

28Marion County, IAIA34,1925−18%

29Monroe County, IAIA7,4065+64%

30Washington County, IAIA22,6674−45%

31Poweshiek County, IAIA18,3684−39%

32Worth County, IAIA7,3384−14%

33Page County, IAIA14,8564−54%

34Hancock County, IAIA10,5284−41%

35Mahaska County, IAIA21,8804−30%

36Hamilton County, IAIA14,9444−47%

37Jasper County, IAIA38,1534−29%

38Dubuque County, IAIA99,3814−39%

39Franklin County, IAIA9,8684−74%

40Warren County, IAIA57,3314−13%

41Decatur County, IAIA7,6554−56%

42Cedar County, IAIA18,3594+0%

43Appanoose County, IAIA12,0774−16%

44Wright County, IAIA12,8013−73%

45Winneshiek County, IAIA19,7333−37%

46Taylor County, IAIA5,8353−67%

47Sioux County, IAIA36,7743−60%

48Cherokee County, IAIA11,3693−25%

49Bremer County, IAIA25,2963−19%

50Dallas County, IAIA118,4573−81%

51Floyd County, IAIA14,9013−39%

52Osceola County, IAIA5,9803−43%

53Lucas County, IAIA8,8473−9%

54Davis County, IAIA9,2303+9%

55Union County, IAIA11,8293−28%

56Calhoun County, IAIA9,5623−41%

57Madison County, IAIA17,2703+2%

58Ringgold County, IAIA4,6423+99%

59Cass County, IAIA12,9603−1%

60Greene County, IAIA8,6583−49%

61Boone County, IAIA26,7993−25%

62Buchanan County, IAIA20,8832−22%

63O'Brien County, IAIA14,2202−64%

64Shelby County, IAIA11,6892−14%

65Ida County, IAIA6,7772+9%

66Delaware County, IAIA17,6742+1%

67Clay County, IAIA16,2022−59%

68Sac County, IAIA9,5252−36%

69Monona County, IAIA8,5392−7%

70Mills County, IAIA14,7932−53%

71Clarke County, IAIA9,5742−81%

72Kossuth County, IAIA14,3222−37%

73Harrison County, IAIA14,6232−20%

74Pocahontas County, IAIA6,8192−41%

75Dickinson County, IAIA18,0772−21%

76Benton County, IAIA26,0042−23%

77Mitchell County, IAIA10,6502−18%

78Keokuk County, IAIA9,7972−11%

79Adair County, IAIA7,4032−29%

80Emmet County, IAIA9,1072−85%

81Grundy County, IAIA12,3612−30%

82Clayton County, IAIA16,8452−34%

83Guthrie County, IAIA10,7822−53%

84Adams County, IAIA3,6172−24%

85Jackson County, IAIA19,2882−22%

86Palo Alto County, IAIA8,8992−47%

87Lyon County, IAIA12,3541+1%

88Howard County, IAIA9,4151−33%

89Iowa County, IAIA16,5041−63%

90Plymouth County, IAIA25,6971−72%

91Carroll County, IAIA20,3031−52%

92Humboldt County, IAIA9,4091−61%

93Wayne County, IAIA6,7381−48%

94Audubon County, IAIA5,5091−48%

95Butler County, IAIA14,0491−53%

96Allamakee County, IAIA14,2381−90%

97Van Buren County, IAIA7,1311−67%

98Chickasaw County, IAIA11,6631−67%

99Montgomery County, IAIA10,0021−84%

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