RANKING · 1990 CENSUS · 99 SHOWN OF 99

Highest Black population share, Iowa counties · 1990

Iowa counties ranked by the share of all residents who are Black or African American (1990 American Community Survey). A concentration measure: Black 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 0.1%.

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 Highest White (non-Hispanic) population share

YEAR1990 2000 2010 2020 2024

RANKPLACESTATEPOPBLACKVS –

01Black Hawk County, IAIA131,5326.9%–

02Scott County, IAIA175,2595.1%–

03Polk County, IAIA516,5464.4%–

04Lee County, IAIA32,3063.0%–

05Des Moines County, IAIA38,0772.9%–

06Johnson County, IAIA160,0442.1%–

07Woodbury County, IAIA106,6492.0%–

08Linn County, IAIA232,0281.9%–

09Webster County, IAIA36,8381.7%–

10Story County, IAIA101,2911.6%–

11Jones County, IAIA21,2531.6%–

12Clinton County, IAIA46,0021.4%–

13Henry County, IAIA19,3491.3%–

14Monroe County, IAIA7,4060.9%–

15Wapello County, IAIA35,2100.8%–

16Louisa County, IAIA10,4160.8%–

17Cerro Gordo County, IAIA42,3720.8%–

18Hardin County, IAIA16,4550.7%–

19Jefferson County, IAIA15,2910.6%–

20Appanoose County, IAIA12,0770.5%–

21Pottawattamie County, IAIA92,9960.5%–

22Marshall County, IAIA39,8900.4%–

23Washington County, IAIA22,6670.4%–

24Jasper County, IAIA38,1530.4%–

25Cherokee County, IAIA11,3690.4%–

26Page County, IAIA14,8560.3%–

27Crawford County, IAIA16,2370.3%–

28Dubuque County, IAIA99,3810.3%–

29Bremer County, IAIA25,2960.3%–

30Poweshiek County, IAIA18,3680.3%–

31Muscatine County, IAIA41,8530.3%–

32Calhoun County, IAIA9,5620.3%–

33Mahaska County, IAIA21,8800.2%–

34Buchanan County, IAIA20,8830.2%–

35Union County, IAIA11,8290.2%–

36Fayette County, IAIA19,0470.2%–

37Winnebago County, IAIA10,2510.2%–

38Buena Vista County, IAIA20,4490.2%–

39Decatur County, IAIA7,6550.2%–

40Boone County, IAIA26,7990.2%–

41Tama County, IAIA16,7960.2%–

42Dallas County, IAIA118,4570.1%–

43Humboldt County, IAIA9,4090.1%–

44Warren County, IAIA57,3310.1%–

45Palo Alto County, IAIA8,8990.1%–

46Marion County, IAIA34,1920.1%–

47Mitchell County, IAIA10,6500.1%–

48Worth County, IAIA7,3380.1%–

49Guthrie County, IAIA10,7820.1%–

50Plymouth County, IAIA25,6970.1%–

51Davis County, IAIA9,2300.1%–

52Howard County, IAIA9,4150.1%–

53Winneshiek County, IAIA19,7330.1%–

54Emmet County, IAIA9,1070.1%–

55Mills County, IAIA14,7930.1%–

56Grundy County, IAIA12,3610.1%–

57Sioux County, IAIA36,7740.1%–

58Shelby County, IAIA11,6890.1%–

59Butler County, IAIA14,0490.1%–

60Cedar County, IAIA18,3590.1%–

61Iowa County, IAIA16,5040.1%–

62Cass County, IAIA12,9600.1%–

63Osceola County, IAIA5,9800.1%–

64Allamakee County, IAIA14,2380.1%–

65Sac County, IAIA9,5250.0%–

66Clay County, IAIA16,2020.0%–

67Benton County, IAIA26,0040.0%–

68Adams County, IAIA3,6170.0%–

69Jackson County, IAIA19,2880.0%–

70Carroll County, IAIA20,3030.0%–

71Clayton County, IAIA16,8450.0%–

72Madison County, IAIA17,2700.0%–

73Taylor County, IAIA5,8350.0%–

74Van Buren County, IAIA7,1310.0%–

75O'Brien County, IAIA14,2200.0%–

76Fremont County, IAIA6,5220.0%–

77Ida County, IAIA6,7770.0%–

78Delaware County, IAIA17,6740.0%–

79Wright County, IAIA12,8010.0%–

80Pocahontas County, IAIA6,8190.0%–

81Keokuk County, IAIA9,7970.0%–

82Harrison County, IAIA14,6230.0%–

83Clarke County, IAIA9,5740.0%–

84Greene County, IAIA8,6580.0%–

85Adair County, IAIA7,4030.0%–

86Audubon County, IAIA5,5090.0%–

87Chickasaw County, IAIA11,6630.0%–

88Dickinson County, IAIA18,0770.0%–

89Floyd County, IAIA14,9010.0%–

90Franklin County, IAIA9,8680.0%–

91Hamilton County, IAIA14,9440.0%–

92Hancock County, IAIA10,5280.0%–

93Kossuth County, IAIA14,3220.0%–

94Lucas County, IAIA8,8470.0%–

95Lyon County, IAIA12,3540.0%–

96Monona County, IAIA8,5390.0%–

97Montgomery County, IAIA10,0020.0%–

98Ringgold County, IAIA4,6420.0%–

99Wayne County, IAIA6,7380.0%–

SHOWING 1–99 OF 99

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