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 (2024 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. The median across all 77 is 0.3%. Biggest climber in the top 100 since 2020: Buchanan County, IA, up 41 places to #30.

Subsaharan African Americans: full group profile →

IowaAll states All rankings

SAME RANKING BYCities States Metros

YEAR2010 2020 2024

Highest Subsaharan African population share by state

RANKPLACESTATEPOPSUBSAHARAN AFRICAN SHAREVS 2010

01Johnson County, IAIA160,0443.7%+2.6 pts

02Polk County, IAIA516,5463.0%+2.1 pts

03▲6Linn County, IAIA232,0282.1%+1.6 pts

04Wapello County, IAIA35,2101.9%+1.5 pts

05▲3Jefferson County, IAIA15,2911.8%+1.2 pts

06▲6Dallas County, IAIA118,4571.7%+1.4 pts

07▲3Woodbury County, IAIA106,6491.6%+0.7 pts

08Winnebago County, IAIA10,2511.5%+1.2 pts

09▲15O'Brien County, IAIA14,2201.3%–

10▲5Story County, IAIA101,2911.1%0.0 pts

11▲8Allamakee County, IAIA14,2381.1%–

12▼7Black Hawk County, IAIA131,5321.1%+0.3 pts

13▼6Buena Vista County, IAIA20,4491.1%−0.1 pts

14▼8Muscatine County, IAIA41,8531.1%+0.9 pts

15▼2Jasper County, IAIA38,1531.0%+0.9 pts

16Adair County, IAIA7,4031.0%–

17▼6Plymouth County, IAIA25,6970.9%+0.9 pts

18▲13Scott County, IAIA175,2590.9%+0.4 pts

19▲1Lee County, IAIA32,3060.9%+0.2 pts

20▼4Palo Alto County, IAIA8,8990.9%–

21▲34Marshall County, IAIA39,8900.9%+0.4 pts

22▲25Decatur County, IAIA7,6550.8%–

23▲3Howard County, IAIA9,4150.8%–

24Montgomery County, IAIA10,0020.7%+0.2 pts

25▲5Boone County, IAIA26,7990.6%−0.2 pts

26▲2Dubuque County, IAIA99,3810.6%+0.3 pts

27▲25Poweshiek County, IAIA18,3680.6%+0.3 pts

28▲1Webster County, IAIA36,8380.5%−1.6 pts

29▲17Sioux County, IAIA36,7740.5%−0.2 pts

30▲41Buchanan County, IAIA20,8830.4%+0.4 pts

31▲3Jones County, IAIA21,2530.4%−0.2 pts

32Fayette County, IAIA19,0470.4%+0.3 pts

33▲9Pottawattamie County, IAIA92,9960.4%+0.3 pts

34▲9Washington County, IAIA22,6670.4%+0.4 pts

35▲32Tama County, IAIA16,7960.4%+0.3 pts

36▲13Mahaska County, IAIA21,8800.4%−0.1 pts

37▼4Emmet County, IAIA9,1070.4%+0.1 pts

38▲1Clayton County, IAIA16,8450.4%0.0 pts

39▲5Warren County, IAIA57,3310.3%+0.3 pts

40▼15Monona County, IAIA8,5390.3%–

41▲22Appanoose County, IAIA12,0770.3%–

42▲17Benton County, IAIA26,0040.3%+0.3 pts

43▲23Hamilton County, IAIA14,9440.3%+0.2 pts

44▼21Cedar County, IAIA18,3590.2%–

45▲6Hancock County, IAIA10,5280.2%–

46▲14Franklin County, IAIA9,8680.2%–

47Madison County, IAIA17,2700.2%–

48▼27Bremer County, IAIA25,2960.2%–

49▲28Dickinson County, IAIA18,0770.2%−0.1 pts

50Grundy County, IAIA12,3610.2%+0.1 pts

51Adams County, IAIA3,6170.2%–

52▼34Des Moines County, IAIA38,0770.2%−1.7 pts

53Union County, IAIA11,8290.2%+0.1 pts

54▼37Fremont County, IAIA6,5220.2%–

55▼2Cerro Gordo County, IAIA42,3720.1%−0.2 pts

56▼21Louisa County, IAIA10,4160.1%0.0 pts

57▲15Lyon County, IAIA12,3540.1%+0.1 pts

58▼44Floyd County, IAIA14,9010.1%−0.1 pts

59▼2Humboldt County, IAIA9,4090.1%–

60▼33Calhoun County, IAIA9,5620.1%−0.1 pts

61▲8Page County, IAIA14,8560.1%–

62Worth County, IAIA7,3380.1%+0.1 pts

63Mitchell County, IAIA10,6500.1%–

64Clinton County, IAIA46,0020.1%−0.5 pts

65▼15Henry County, IAIA19,3490.1%−0.1 pts

66▼12Harrison County, IAIA14,6230.1%−0.1 pts

67▲3Hardin County, IAIA16,4550.1%−0.5 pts

68Cass County, IAIA12,9600.1%0.0 pts

69▼32Winneshiek County, IAIA19,7330.1%−0.4 pts

70▼8Keokuk County, IAIA9,7970.1%–

71▲4Mills County, IAIA14,7930.0%0.0 pts

72▼69Crawford County, IAIA16,2370.0%−0.2 pts

73Clarke County, IAIA9,5740.0%–

74Kossuth County, IAIA14,3220.0%0.0 pts

75▼34Clay County, IAIA16,2020.0%–

76▼54Carroll County, IAIA20,3030.0%–

77▼12Greene County, IAIA8,6580.0%–

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UPDATED 2026-09-11 · DATA: US CENSUS BUREAU ACS 5-YEAR ESTIMATES