RANKING · 2024 ACS · 77 SHOWN OF 77

Largest Subsaharan African population, Iowa counties

Iowa counties ranked by the number of residents who are Subsaharan African ancestry, from the 2024 American Community Survey detailed-origin tables. Each list covers the full eligible universe; download the complete data as CSV. This list covers the 77 counties in Iowa that qualify, ranked against each other statewide.

Subsaharan African Americans: full group profile →

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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

RANKPLACESTATEPOPSUBSAHARAN AFRICAN POPULATIONVS 2010

01Polk County, IAIA516,54614,954+303%

02Johnson County, IAIA160,0445,852+305%

03Linn County, IAIA232,0284,791+403%

04Dallas County, IAIA118,4571,863+841%

05Woodbury County, IAIA106,6491,714+95%

06Scott County, IAIA175,2591,620+73%

07Black Hawk County, IAIA131,5321,461+45%

08Story County, IAIA101,2911,135+14%

09Wapello County, IAIA35,210673+323%

10Dubuque County, IAIA99,381552+137%

11Muscatine County, IAIA41,853463+368%

12Jasper County, IAIA38,153397+459%

13Pottawattamie County, IAIA92,996390+177%

14Marshall County, IAIA39,890345+94%

15Lee County, IAIA32,306296+25%

16Jefferson County, IAIA15,291287+166%

17Plymouth County, IAIA25,697241+7933%

18Buena Vista County, IAIA20,449227−5%

19Webster County, IAIA36,838194−76%

20Warren County, IAIA57,331190+387%

21Sioux County, IAIA36,774189−26%

22O'Brien County, IAIA14,220188–

23Allamakee County, IAIA14,238158–

24Winnebago County, IAIA10,251154+492%

25Boone County, IAIA26,799150−21%

26Poweshiek County, IAIA18,368102+92%

27Buchanan County, IAIA20,88392+667%

28Jones County, IAIA21,25391−31%

29Washington County, IAIA22,66791+1417%

30Mahaska County, IAIA21,88086−13%

31Fayette County, IAIA19,04783+232%

32Benton County, IAIA26,00479+464%

33Palo Alto County, IAIA8,89979–

34Adair County, IAIA7,40376–

35Des Moines County, IAIA38,07773−91%

36Montgomery County, IAIA10,00273+20%

37Howard County, IAIA9,41571–

38Tama County, IAIA16,79666+288%

39Decatur County, IAIA7,65561–

40Cerro Gordo County, IAIA42,37260−57%

41Clayton County, IAIA16,84560−14%

42Bremer County, IAIA25,29653–

43Clinton County, IAIA46,00246−85%

44Cedar County, IAIA18,35945–

45Madison County, IAIA17,27039–

46Appanoose County, IAIA12,07738–

47Hamilton County, IAIA14,94438+1800%

48Dickinson County, IAIA18,07735−34%

49Emmet County, IAIA9,10735+35%

50Monona County, IAIA8,53928–

51Hancock County, IAIA10,52825–

52Grundy County, IAIA12,36124+167%

53Franklin County, IAIA9,86823–

54Union County, IAIA11,82921+110%

55Floyd County, IAIA14,90121−40%

56Page County, IAIA14,85619–

57Henry County, IAIA19,34918−44%

58Lyon County, IAIA12,35417+467%

59Louisa County, IAIA10,41615−6%

60Calhoun County, IAIA9,56213−50%

61Hardin County, IAIA16,45513−86%

62Humboldt County, IAIA9,40913–

63Harrison County, IAIA14,62312−61%

64Winneshiek County, IAIA19,73312−88%

65Mitchell County, IAIA10,65011–

66Cass County, IAIA12,96010+11%

67Fremont County, IAIA6,52210–

68Worth County, IAIA7,3389+80%

69Adams County, IAIA3,6177–

70Crawford County, IAIA16,2377−85%

71Mills County, IAIA14,7937−36%

72Keokuk County, IAIA9,7975–

73Clarke County, IAIA9,5744–

74Carroll County, IAIA20,3034–

75Clay County, IAIA16,2024–

76Kossuth County, IAIA14,3224−60%

77Greene County, IAIA8,6581–

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UPDATED 2026-07-15 · DATA: US CENSUS BUREAU ACS 5-YEAR ESTIMATES