RANKING · 2020 CENSUS · 78 SHOWN OF 78

Largest Subsaharan African population, Iowa counties · 2020

Iowa counties ranked by the number of residents who are Subsaharan African ancestry, from the 2020 American Community Survey detailed-origin tables. Each list covers the full eligible universe; download the complete data as CSV. This list covers the 78 counties in Iowa that qualify, ranked against each other statewide. The median across all 78 is 39.

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, IAIA516,54611,179+201%

02Johnson County, IAIA160,0445,351+270%

03Linn County, IAIA232,0283,011+216%

04Black Hawk County, IAIA131,5322,192+118%

05Woodbury County, IAIA106,6491,369+56%

06Dallas County, IAIA118,457996+403%

07Story County, IAIA101,291909−9%

08Muscatine County, IAIA41,853707+614%

09Wapello County, IAIA35,210636+300%

10Scott County, IAIA175,259518−45%

11Jasper County, IAIA38,153399+462%

12Crawford County, IAIA16,237390+713%

13Dubuque County, IAIA99,381358+54%

14Plymouth County, IAIA25,697311+10267%

15Buena Vista County, IAIA20,449302+26%

16Des Moines County, IAIA38,077283−64%

17Jefferson County, IAIA15,291253+134%

18Lee County, IAIA32,306184−22%

19Pottawattamie County, IAIA92,996183+30%

20Floyd County, IAIA14,901154+340%

21Bremer County, IAIA25,296131–

22Webster County, IAIA36,838125−85%

23Carroll County, IAIA20,303102–

24Allamakee County, IAIA14,23896–

25Cedar County, IAIA18,35993–

26Warren County, IAIA57,33187+123%

27Boone County, IAIA26,79984−56%

28Palo Alto County, IAIA8,89970–

29O'Brien County, IAIA14,22069–

30Jones County, IAIA21,25359−55%

31Fayette County, IAIA19,04758+132%

32Sioux County, IAIA36,77458−77%

33Cerro Gordo County, IAIA42,37257−60%

34Marion County, IAIA34,19254+10%

35Fremont County, IAIA6,52253–

36Marshall County, IAIA39,89051−71%

37Winneshiek County, IAIA19,73346−54%

38Clayton County, IAIA16,84539−44%

39Monona County, IAIA8,53939–

40Calhoun County, IAIA9,56238+46%

41Howard County, IAIA9,41538–

42Washington County, IAIA22,66738+533%

43Clay County, IAIA16,20235–

44Mahaska County, IAIA21,88034−66%

45Butler County, IAIA14,04933+136%

46Clinton County, IAIA46,00233−89%

47Louisa County, IAIA10,41631+94%

48Henry County, IAIA19,34930−6%

49Poweshiek County, IAIA18,36827−49%

50Cherokee County, IAIA11,36927–

51Emmet County, IAIA9,10727+4%

52Benton County, IAIA26,00424+71%

53Harrison County, IAIA14,62318−42%

54Monroe County, IAIA7,40617–

55Hancock County, IAIA10,52816–

56Decatur County, IAIA7,65513–

57Van Buren County, IAIA7,13112–

58Tama County, IAIA16,79611−35%

59Hamilton County, IAIA14,94410+400%

60Hardin County, IAIA16,45510−89%

61Humboldt County, IAIA9,40910–

62Appanoose County, IAIA12,0779–

63Buchanan County, IAIA20,8839−25%

64Franklin County, IAIA9,8689–

65Page County, IAIA14,8569–

66Cass County, IAIA12,9608−11%

67Keokuk County, IAIA9,7978–

68Wayne County, IAIA6,7388–

69Pocahontas County, IAIA6,8197–

70Greene County, IAIA8,6586–

71Lyon County, IAIA12,3545+67%

72Osceola County, IAIA5,9805−17%

73Kossuth County, IAIA14,3224−60%

74Mills County, IAIA14,7933−73%

75Sac County, IAIA9,5253–

76Iowa County, IAIA16,5042−95%

77Dickinson County, IAIA18,0771−98%

78Jackson County, IAIA19,2881–

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UPDATED 2026-09-11 · DATA: US CENSUS BUREAU DECENNIAL CENSUS