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. The median across all 77 is 61. Biggest climber in the top 100 since 2020: Buchanan County, IA, up 36 places to #27.

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%

04▲2Dallas County, IAIA118,4571,863+841%

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

06▲4Scott County, IAIA175,2591,620+73%

07▼3Black Hawk County, IAIA131,5321,461+45%

08▼1Story County, IAIA101,2911,135+14%

09Wapello County, IAIA35,210673+323%

10▲3Dubuque County, IAIA99,381552+137%

11▼3Muscatine County, IAIA41,853463+368%

12▼1Jasper County, IAIA38,153397+459%

13▲6Pottawattamie County, IAIA92,996390+177%

14▲22Marshall County, IAIA39,890345+94%

15▲3Lee County, IAIA32,306296+25%

16▲1Jefferson County, IAIA15,291287+166%

17▼3Plymouth County, IAIA25,697241+7933%

18▼3Buena Vista County, IAIA20,449227−5%

19▲3Webster County, IAIA36,838194−76%

20▲6Warren County, IAIA57,331190+387%

21▲11Sioux County, IAIA36,774189−26%

22▲7O'Brien County, IAIA14,220188–

23▲1Allamakee County, IAIA14,238158–

24Winnebago County, IAIA10,251154+492%

25▲2Boone County, IAIA26,799150−21%

26▲23Poweshiek County, IAIA18,368102+92%

27▲36Buchanan County, IAIA20,88392+667%

28▲2Jones County, IAIA21,25391−31%

29▲13Washington County, IAIA22,66791+1417%

30▲14Mahaska County, IAIA21,88086−13%

31Fayette County, IAIA19,04783+232%

32▲20Benton County, IAIA26,00479+464%

33▼5Palo Alto County, IAIA8,89979–

34Adair County, IAIA7,40376–

35▼19Des Moines County, IAIA38,07773−91%

36Montgomery County, IAIA10,00273+20%

37▲4Howard County, IAIA9,41571–

38▲20Tama County, IAIA16,79666+288%

39▲17Decatur County, IAIA7,65561–

40▼7Cerro Gordo County, IAIA42,37260−57%

41▼3Clayton County, IAIA16,84560−14%

42▼21Bremer County, IAIA25,29653–

43▲3Clinton County, IAIA46,00246−85%

44▼19Cedar County, IAIA18,35945–

45Madison County, IAIA17,27039–

46▲16Appanoose County, IAIA12,07738–

47▲12Hamilton County, IAIA14,94438+1800%

48▲29Dickinson County, IAIA18,07735−34%

49▲2Emmet County, IAIA9,10735+35%

50▼11Monona County, IAIA8,53928–

51▲4Hancock County, IAIA10,52825–

52Grundy County, IAIA12,36124+167%

53▲11Franklin County, IAIA9,86823–

54Union County, IAIA11,82921+110%

55▼35Floyd County, IAIA14,90121−40%

56▲9Page County, IAIA14,85619–

57▼9Henry County, IAIA19,34918−44%

58▲13Lyon County, IAIA12,35417+467%

59▼12Louisa County, IAIA10,41615−6%

60▼20Calhoun County, IAIA9,56213−50%

61▼1Hardin County, IAIA16,45513−86%

62▼1Humboldt County, IAIA9,40913–

63▼10Harrison County, IAIA14,62312−61%

64▼27Winneshiek County, IAIA19,73312−88%

65Mitchell County, IAIA10,65011–

66Cass County, IAIA12,96010+11%

67▼32Fremont County, IAIA6,52210–

68Worth County, IAIA7,3389+80%

69Adams County, IAIA3,6177–

70▼58Crawford County, IAIA16,2377−85%

71▲3Mills County, IAIA14,7937−36%

72▼5Keokuk County, IAIA9,7975–

73Clarke County, IAIA9,5744–

74▼51Carroll County, IAIA20,3034–

75▼32Clay County, IAIA16,2024–

76▼3Kossuth County, IAIA14,3224−60%

77▼7Greene County, IAIA8,6581–

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