RANKING · 2024 ACS · 77 SHOWN OF 77

Highest Subsaharan African population share, Iowa counties

Iowa counties ranked by the share of all residents who are Subsaharan African ancestry (2023 American Community Survey). A concentration measure: Subsaharan African residents as a percentage of total population. This list covers the 77 counties in Iowa that qualify, ranked against each other statewide.

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RELATEDLargest American population Highest American population share Largest Arab population Highest Arab population share Largest Egyptian population Highest Egyptian population share

YEAR2010 2020 2024

Highest Subsaharan African population share by state

RANKPLACESTATEPOPSUBSAHARAN AFRICAN SHAREVS 2000

01Johnson County, IAIA160,0443.7%–

02Polk County, IAIA516,5463.0%–

03Linn County, IAIA232,0282.1%–

04Wapello County, IAIA35,2101.9%–

05Jefferson County, IAIA15,2911.8%–

06Dallas County, IAIA118,4571.7%–

07Woodbury County, IAIA106,6491.6%–

08Winnebago County, IAIA10,2511.5%–

09O'Brien County, IAIA14,2201.3%–

10Story County, IAIA101,2911.1%–

11Allamakee County, IAIA14,2381.1%–

12Black Hawk County, IAIA131,5321.1%–

13Buena Vista County, IAIA20,4491.1%–

14Muscatine County, IAIA41,8531.1%–

15Jasper County, IAIA38,1531.0%–

16Adair County, IAIA7,4031.0%–

17Plymouth County, IAIA25,6970.9%–

18Scott County, IAIA175,2590.9%–

19Lee County, IAIA32,3060.9%–

20Palo Alto County, IAIA8,8990.9%–

21Marshall County, IAIA39,8900.9%–

22Decatur County, IAIA7,6550.8%–

23Howard County, IAIA9,4150.8%–

24Montgomery County, IAIA10,0020.7%–

25Boone County, IAIA26,7990.6%–

26Dubuque County, IAIA99,3810.6%–

27Poweshiek County, IAIA18,3680.6%–

28Webster County, IAIA36,8380.5%–

29Sioux County, IAIA36,7740.5%–

30Buchanan County, IAIA20,8830.4%–

31Jones County, IAIA21,2530.4%–

32Fayette County, IAIA19,0470.4%–

33Pottawattamie County, IAIA92,9960.4%–

34Washington County, IAIA22,6670.4%–

35Tama County, IAIA16,7960.4%–

36Mahaska County, IAIA21,8800.4%–

37Emmet County, IAIA9,1070.4%–

38Clayton County, IAIA16,8450.4%–

39Warren County, IAIA57,3310.3%–

40Monona County, IAIA8,5390.3%–

41Appanoose County, IAIA12,0770.3%–

42Benton County, IAIA26,0040.3%–

43Hamilton County, IAIA14,9440.3%–

44Cedar County, IAIA18,3590.2%–

45Hancock County, IAIA10,5280.2%–

46Franklin County, IAIA9,8680.2%–

47Madison County, IAIA17,2700.2%–

48Bremer County, IAIA25,2960.2%–

49Dickinson County, IAIA18,0770.2%–

50Grundy County, IAIA12,3610.2%–

51Adams County, IAIA3,6170.2%–

52Des Moines County, IAIA38,0770.2%–

53Union County, IAIA11,8290.2%–

54Fremont County, IAIA6,5220.2%–

55Cerro Gordo County, IAIA42,3720.1%–

56Louisa County, IAIA10,4160.1%–

57Lyon County, IAIA12,3540.1%–

58Floyd County, IAIA14,9010.1%–

59Humboldt County, IAIA9,4090.1%–

60Calhoun County, IAIA9,5620.1%–

61Page County, IAIA14,8560.1%–

62Worth County, IAIA7,3380.1%–

63Mitchell County, IAIA10,6500.1%–

64Clinton County, IAIA46,0020.1%–

65Henry County, IAIA19,3490.1%–

66Harrison County, IAIA14,6230.1%–

67Hardin County, IAIA16,4550.1%–

68Cass County, IAIA12,9600.1%–

69Winneshiek County, IAIA19,7330.1%–

70Keokuk County, IAIA9,7970.1%–

71Mills County, IAIA14,7930.0%–

72Crawford County, IAIA16,2370.0%–

73Clarke County, IAIA9,5740.0%–

74Kossuth County, IAIA14,3220.0%–

75Clay County, IAIA16,2020.0%–

76Carroll County, IAIA20,3030.0%–

77Greene County, IAIA8,6580.0%–

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UPDATED 2026-06-06 · DATA: US CENSUS BUREAU ACS 5-YEAR ESTIMATES