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.

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, IAIA175,2595.2%–

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%–

09Story County, IAIA101,2911.7%–

10Webster County, IAIA36,8381.7%–

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%–

26Dubuque County, IAIA99,3810.4%–

27Page County, IAIA14,8560.3%–

28Crawford County, IAIA16,2370.3%–

29Muscatine County, IAIA41,8530.3%–

30Bremer County, IAIA25,2960.3%–

31Poweshiek County, IAIA18,3680.3%–

32Buena Vista County, IAIA20,4490.3%–

33Calhoun County, IAIA9,5620.3%–

34Mahaska County, IAIA21,8800.2%–

35Buchanan County, IAIA20,8830.2%–

36Fayette County, IAIA19,0470.2%–

37Union County, IAIA11,8290.2%–

38Marion County, IAIA34,1920.2%–

39Winnebago County, IAIA10,2510.2%–

40Decatur County, IAIA7,6550.2%–

41Tama County, IAIA16,7960.2%–

42Howard County, IAIA9,4150.2%–

43Boone County, IAIA26,7990.2%–

44Dallas County, IAIA118,4570.1%–

45Humboldt County, IAIA9,4090.1%–

46Warren County, IAIA57,3310.1%–

47Palo Alto County, IAIA8,8990.1%–

48Plymouth County, IAIA25,6970.1%–

49Mitchell County, IAIA10,6500.1%–

50Worth County, IAIA7,3380.1%–

51Guthrie County, IAIA10,7820.1%–

52Davis County, IAIA9,2300.1%–

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%–

59Allamakee County, IAIA14,2380.1%–

60Butler County, IAIA14,0490.1%–

61Cedar County, IAIA18,3590.1%–

62Iowa County, IAIA16,5040.1%–

63Cass County, IAIA12,9600.1%–

64Osceola County, IAIA5,9800.1%–

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 2026-07-15 · DATA: US CENSUS BUREAU DECENNIAL CENSUS