RANKING · 2024 ACS · 99 SHOWN OF 99

Most segregated, Iowa counties

Iowa counties ranked by the CensusEasy Segregation Score, the White vs non-White index of dissimilarity across census tracts (2024 ACS). Higher means residents are more sorted into separate neighborhoods. This list covers the 99 counties in Iowa that qualify, ranked against each other statewide.

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

RANKPLACESTATEPOPSEGREGATION SCOREVS 2020

01Allamakee County, IAIA14,23857−3%

02Buena Vista County, IAIA20,44945−6%

03Crawford County, IAIA16,23742−16%

04Black Hawk County, IAIA131,53242−4%

05Marshall County, IAIA39,89042+12%

06Tama County, IAIA16,79637−14%

07O'Brien County, IAIA14,22037+241%

08Clarke County, IAIA9,57436−11%

09Louisa County, IAIA10,41636−5%

10Jasper County, IAIA38,15335+2%

11Woodbury County, IAIA106,64934−18%

12Wapello County, IAIA35,21034−4%

13Appanoose County, IAIA12,07734+184%

14Polk County, IAIA516,54633−9%

15Franklin County, IAIA9,86833+17%

16Muscatine County, IAIA41,85331+22%

17Taylor County, IAIA5,83531−18%

18Linn County, IAIA232,02831−4%

19Des Moines County, IAIA38,07730−13%

20Dickinson County, IAIA18,07729+101%

21Sac County, IAIA9,52529−34%

22Jefferson County, IAIA15,29128+0%

23Palo Alto County, IAIA8,89928+57%

24Lucas County, IAIA8,84728+19%

25Marion County, IAIA34,19228−16%

26Wright County, IAIA12,80128−5%

27Henry County, IAIA19,34928−23%

28Kossuth County, IAIA14,32226+101%

29Dubuque County, IAIA99,38126−5%

30Hancock County, IAIA10,52826+33%

31Johnson County, IAIA160,04426−3%

32Hamilton County, IAIA14,94426−29%

33Plymouth County, IAIA25,69726+57%

34Cass County, IAIA12,96026−6%

35Page County, IAIA14,85626−2%

36Story County, IAIA101,29125−26%

37Webster County, IAIA36,83825−24%

38Adair County, IAIA7,40325+36%

39Washington County, IAIA22,66724−19%

40Scott County, IAIA175,25924−12%

41Madison County, IAIA17,27024+53%

42Dallas County, IAIA118,45724−29%

43Mills County, IAIA14,79324+230%

44Calhoun County, IAIA9,56223+21%

45Pottawattamie County, IAIA92,99623−24%

46Clayton County, IAIA16,84523−33%

47Worth County, IAIA7,33823+76%

48Chickasaw County, IAIA11,66323+33%

49Greene County, IAIA8,65822+120%

50Montgomery County, IAIA10,00222+50%

51Bremer County, IAIA25,29622−36%

52Cedar County, IAIA18,35922−15%

53Poweshiek County, IAIA18,36822−40%

54Clay County, IAIA16,20221+3%

55Lee County, IAIA32,30621−38%

56Cerro Gordo County, IAIA42,37221−5%

57Cherokee County, IAIA11,36921−18%

58Jackson County, IAIA19,28821−24%

59Floyd County, IAIA14,90120−53%

60Sioux County, IAIA36,77420−17%

61Clinton County, IAIA46,00220−32%

62Monona County, IAIA8,53920−31%

63Mahaska County, IAIA21,88019−3%

64Hardin County, IAIA16,45519−17%

65Decatur County, IAIA7,65519−10%

66Fayette County, IAIA19,04719+25%

67Delaware County, IAIA17,67418+329%

68Jones County, IAIA21,25318−54%

69Adams County, IAIA3,61718−4%

70Winnebago County, IAIA10,25118−13%

71Winneshiek County, IAIA19,73317−21%

72Mitchell County, IAIA10,65017+191%

73Davis County, IAIA9,23016+120%

74Union County, IAIA11,82916−31%

75Warren County, IAIA57,33115−27%

76Boone County, IAIA26,79915−31%

77Keokuk County, IAIA9,79715−3%

78Carroll County, IAIA20,30314+28%

79Benton County, IAIA26,00413−7%

80Emmet County, IAIA9,10713−34%

81Grundy County, IAIA12,36113−43%

82Fremont County, IAIA6,52212+527%

83Butler County, IAIA14,04912−18%

84Iowa County, IAIA16,50412−34%

85Howard County, IAIA9,41511−62%

86Harrison County, IAIA14,62311−55%

87Pocahontas County, IAIA6,81911+60%

88Monroe County, IAIA7,40611−23%

89Lyon County, IAIA12,35411+256%

90Wayne County, IAIA6,73810+21%

91Humboldt County, IAIA9,40910−55%

92Guthrie County, IAIA10,7829+246%

93Audubon County, IAIA5,5099−77%

94Osceola County, IAIA5,9808+187%

95Buchanan County, IAIA20,8838−64%

96Ida County, IAIA6,7777−74%

97Shelby County, IAIA11,6896−67%

98Van Buren County, IAIA7,1316+15%

99Ringgold County, IAIA4,6424−75%

SHOWING 1–99 OF 99

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

UPDATED 2026-07-15 · DATA: US CENSUS BUREAU ACS 5-YEAR ESTIMATES