RANKING · 2020 CENSUS · 99 SHOWN OF 99

Highest Black population share, Iowa counties · 2020

Iowa counties ranked by the share of all residents who are Black or African American (2020 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 2000

01Black Hawk County, IAIA131,53210.3%+31%

02Johnson County, IAIA160,0448.3%+192%

03Scott County, IAIA175,2597.8%+31%

04Polk County, IAIA516,5467.1%+49%

05Linn County, IAIA232,0287.0%+178%

06Des Moines County, IAIA38,0776.4%+83%

07Webster County, IAIA36,8384.8%+44%

08Woodbury County, IAIA106,6494.8%+147%

09Wapello County, IAIA35,2104.1%+346%

10Dubuque County, IAIA99,3814.1%+392%

11Story County, IAIA101,2913.0%+68%

12Clinton County, IAIA46,0023.0%+62%

13Buena Vista County, IAIA20,4492.7%+800%

14Lee County, IAIA32,3062.7%−3%

15Dallas County, IAIA118,4572.7%+287%

16Floyd County, IAIA14,9012.7%+1113%

17Jefferson County, IAIA15,2912.6%+314%

18Muscatine County, IAIA41,8532.5%+287%

19Henry County, IAIA19,3492.4%+69%

20Page County, IAIA14,8562.4%+47%

21Crawford County, IAIA16,2372.3%+236%

22Jones County, IAIA21,2532.1%+20%

23Cerro Gordo County, IAIA42,3722.0%+155%

24Pottawattamie County, IAIA92,9962.0%+161%

25Marshall County, IAIA39,8902.0%+121%

26Winnebago County, IAIA10,2511.9%+966%

27Jasper County, IAIA38,1531.8%+118%

28Mahaska County, IAIA21,8801.7%+176%

29Poweshiek County, IAIA18,3681.7%+219%

30Calhoun County, IAIA9,5621.5%+122%

31Plymouth County, IAIA25,6971.4%+411%

32Decatur County, IAIA7,6551.3%+40%

33Carroll County, IAIA20,3031.3%+672%

34O'Brien County, IAIA14,2201.1%+268%

35Boone County, IAIA26,7991.1%+259%

36Allamakee County, IAIA14,2381.0%+626%

37Fayette County, IAIA19,0471.0%+103%

38Bremer County, IAIA25,2961.0%+103%

39Emmet County, IAIA9,1070.9%+302%

40Union County, IAIA11,8290.9%+313%

41Pocahontas County, IAIA6,8190.9%+285%

42Clayton County, IAIA16,8450.9%+593%

43Warren County, IAIA57,3310.9%+231%

44Hardin County, IAIA16,4550.9%+45%

45Marion County, IAIA34,1920.8%+109%

46Worth County, IAIA7,3380.8%+204%

47Washington County, IAIA22,6670.8%+180%

48Tama County, IAIA16,7960.7%+200%

49Cherokee County, IAIA11,3690.7%+129%

50Jackson County, IAIA19,2880.7%+668%

51Hancock County, IAIA10,5280.7%+1117%

52Delaware County, IAIA17,6740.7%+970%

53Louisa County, IAIA10,4160.7%+216%

54Iowa County, IAIA16,5040.7%+318%

55Chickasaw County, IAIA11,6630.6%+1068%

56Appanoose County, IAIA12,0770.6%+44%

57Clay County, IAIA16,2020.6%+250%

58Adair County, IAIA7,4030.6%+725%

59Winneshiek County, IAIA19,7330.6%+17%

60Hamilton County, IAIA14,9440.6%+153%

61Palo Alto County, IAIA8,8990.6%+552%

62Wright County, IAIA12,8010.6%+326%

63Humboldt County, IAIA9,4090.6%+719%

64Mills County, IAIA14,7930.5%+89%

65Sioux County, IAIA36,7740.5%+184%

66Kossuth County, IAIA14,3220.5%+333%

67Sac County, IAIA9,5250.5%+86%

68Keokuk County, IAIA9,7970.5%+568%

69Osceola County, IAIA5,9800.5%+296%

70Shelby County, IAIA11,6890.5%+357%

71Clarke County, IAIA9,5740.4%+303%

72Benton County, IAIA26,0040.4%+122%

73Dickinson County, IAIA18,0770.4%+253%

74Cedar County, IAIA18,3590.4%+128%

75Ida County, IAIA6,7770.4%+292%

76Mitchell County, IAIA10,6500.4%+128%

77Van Buren County, IAIA7,1310.4%+464%

78Grundy County, IAIA12,3610.3%+331%

79Buchanan County, IAIA20,8830.3%+33%

80Adams County, IAIA3,6170.3%+626%

81Monona County, IAIA8,5390.3%+301%

82Franklin County, IAIA9,8680.3%+280%

83Lyon County, IAIA12,3540.3%+241%

84Audubon County, IAIA5,5090.3%+127%

85Madison County, IAIA17,2700.3%+211%

86Guthrie County, IAIA10,7820.3%+106%

87Greene County, IAIA8,6580.3%+100%

88Howard County, IAIA9,4150.2%+119%

89Montgomery County, IAIA10,0020.2%+217%

90Monroe County, IAIA7,4060.2%+19%

91Cass County, IAIA12,9600.2%+1%

92Lucas County, IAIA8,8470.2%+64%

93Harrison County, IAIA14,6230.2%+123%

94Butler County, IAIA14,0490.2%+114%

95Wayne County, IAIA6,7380.2%+159%

96Fremont County, IAIA6,5220.2%+304%

97Davis County, IAIA9,2300.1%−42%

98Ringgold County, IAIA4,6420.0%−61%

99Taylor County, IAIA5,8350.0%−41%

SHOWING 1–99 OF 99

Download CSV (full list, 99 rows)

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