RANKING · 1990 CENSUS · 99 SHOWN OF 99

Highest White (non-Hispanic) population share, Iowa counties · 1990

Iowa counties ranked by the share of all residents who are White, not Hispanic or Latino (1990 American Community Survey). A concentration measure: White (non-Hispanic) residents as a percentage of total population. This list covers the 99 counties in Iowa that qualify, ranked against each other statewide. The median across all 99 is 99.0%.

IowaAll states All rankings

SAME RANKING BYCities States Metros ZIP codes

RELATEDHighest Asian household income Highest Black household income Highest Hispanic household income Highest White (non-Hispanic) household income Largest White (non-Hispanic) population Largest Black population

YEAR1990 2000 2010 2020 2024

Highest White (non-Hispanic) population share by state

RANKPLACESTATEPOPWHITE, NON-HISPANICVS –

01Montgomery County, IAIA10,00299.7%–

02Chickasaw County, IAIA11,66399.7%–

03Van Buren County, IAIA7,13199.6%–

04Allamakee County, IAIA14,23899.6%–

05Butler County, IAIA14,04999.6%–

06Audubon County, IAIA5,50999.6%–

07Wayne County, IAIA6,73899.5%–

08Plymouth County, IAIA25,69799.5%–

09Carroll County, IAIA20,30399.5%–

10Iowa County, IAIA16,50499.5%–

11Howard County, IAIA9,41599.5%–

12Humboldt County, IAIA9,40999.5%–

13Jackson County, IAIA19,28899.5%–

14Lyon County, IAIA12,35499.5%–

15Guthrie County, IAIA10,78299.5%–

16Grundy County, IAIA12,36199.5%–

17Palo Alto County, IAIA8,89999.4%–

18Kossuth County, IAIA14,32299.4%–

19Clayton County, IAIA16,84599.4%–

20Adams County, IAIA3,61799.4%–

21Adair County, IAIA7,40399.3%–

22Ida County, IAIA6,77799.3%–

23Keokuk County, IAIA9,79799.3%–

24Emmet County, IAIA9,10799.3%–

25Dickinson County, IAIA18,07799.3%–

26Davis County, IAIA9,23099.3%–

27Sac County, IAIA9,52599.3%–

28Benton County, IAIA26,00499.3%–

29Mills County, IAIA14,79399.3%–

30Madison County, IAIA17,27099.3%–

31Harrison County, IAIA14,62399.2%–

32Pocahontas County, IAIA6,81999.2%–

33Mitchell County, IAIA10,65099.2%–

34Osceola County, IAIA5,98099.2%–

35Clay County, IAIA16,20299.2%–

36Cass County, IAIA12,96099.2%–

37Delaware County, IAIA17,67499.2%–

38Clarke County, IAIA9,57499.2%–

39Monona County, IAIA8,53999.2%–

40Buchanan County, IAIA20,88399.2%–

41Shelby County, IAIA11,68999.1%–

42O'Brien County, IAIA14,22099.1%–

43Greene County, IAIA8,65899.1%–

44Calhoun County, IAIA9,56299.0%–

45Boone County, IAIA26,79999.0%–

46Floyd County, IAIA14,90199.0%–

47Franklin County, IAIA9,86899.0%–

48Ringgold County, IAIA4,64299.0%–

49Cedar County, IAIA18,35999.0%–

50Lucas County, IAIA8,84799.0%–

51Union County, IAIA11,82998.9%–

52Dallas County, IAIA118,45798.9%–

53Hancock County, IAIA10,52898.9%–

54Taylor County, IAIA5,83598.9%–

55Bremer County, IAIA25,29698.8%–

56Wright County, IAIA12,80198.8%–

57Sioux County, IAIA36,77498.8%–

58Worth County, IAIA7,33898.7%–

59Cherokee County, IAIA11,36998.7%–

60Winneshiek County, IAIA19,73398.7%–

61Warren County, IAIA57,33198.7%–

62Decatur County, IAIA7,65598.7%–

63Fremont County, IAIA6,52298.6%–

64Hamilton County, IAIA14,94498.6%–

65Appanoose County, IAIA12,07798.6%–

66Mahaska County, IAIA21,88098.5%–

67Washington County, IAIA22,66798.5%–

68Dubuque County, IAIA99,38198.5%–

69Jasper County, IAIA38,15398.5%–

70Fayette County, IAIA19,04798.4%–

71Poweshiek County, IAIA18,36898.4%–

72Page County, IAIA14,85698.4%–

73Hardin County, IAIA16,45598.3%–

74Marion County, IAIA34,19298.3%–

75Monroe County, IAIA7,40698.2%–

76Crawford County, IAIA16,23798.1%–

77Wapello County, IAIA35,21097.7%–

78Jones County, IAIA21,25397.7%–

79Winnebago County, IAIA10,25197.7%–

80Jefferson County, IAIA15,29197.6%–

81Clinton County, IAIA46,00297.6%–

82Marshall County, IAIA39,89097.5%–

83Buena Vista County, IAIA20,44997.3%–

84Pottawattamie County, IAIA92,99697.2%–

85Cerro Gordo County, IAIA42,37297.0%–

86Henry County, IAIA19,34996.8%–

87Webster County, IAIA36,83896.5%–

88Linn County, IAIA232,02896.2%–

89Louisa County, IAIA10,41695.8%–

90Des Moines County, IAIA38,07795.4%–

91Lee County, IAIA32,30694.8%–

92Tama County, IAIA16,79694.0%–

93Story County, IAIA101,29192.8%–

94Johnson County, IAIA160,04492.7%–

95Woodbury County, IAIA106,64992.5%–

96Muscatine County, IAIA41,85391.7%–

97Polk County, IAIA516,54691.6%–

98Black Hawk County, IAIA131,53291.4%–

99Scott County, IAIA175,25990.9%–

SHOWING 1–99 OF 99

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UPDATED 2026-09-11 · DATA: US CENSUS BUREAU DECENNIAL CENSUS