Data / Rankings / Black or African American population share / Counties in Iowa

Counties in Iowa by black or African American population share

Black Hawk County had the highest black or African American population share of 99 counties in 2021, at 9.4%. Davis County had the lowest, at 0%. The median was 0.7% and the figure for Iowa was 3.7%. Source: the U.S. Census Bureau.

Highest9.4Black Hawk County
Lowest0Davis County
Median0.799 counties
Iowa3.7History

Top 40 counties, 2021

CSVChart (SVG)

Black Hawk CountyBlack Hawk County: 9.4 %9.4Johnson CountyJohnson County: 7.1 %7.1Polk CountyPolk County: 7 %7Scott CountyScott County: 7 %7Jefferson CountyJefferson County: 6.6 %6.6Des Moines CountyDes Moines County: 5.9 %5.9Linn CountyLinn County: 5.8 %5.8Webster CountyWebster County: 4.3 %4.3Woodbury CountyWoodbury County: 3.7 %3.7Crawford CountyCrawford County: 3.5 %3.5Wapello CountyWapello County: 3.3 %3.3Lee CountyLee County: 3 %3Dubuque CountyDubuque County: 2.9 %2.9Clinton CountyClinton County: 2.8 %2.8Buena Vista CountyBuena Vista County: 2.6 %2.6Muscatine CountyMuscatine County: 2.5 %2.5Henry CountyHenry County: 2.5 %2.5Emmet CountyEmmet County: 2.4 %2.4Story CountyStory County: 2.3 %2.3Jones CountyJones County: 2.2 %2.2Dallas CountyDallas County: 2 %2Page CountyPage County: 1.7 %1.7Jasper CountyJasper County: 1.7 %1.7Cerro Gordo CountyCerro Gordo County: 1.7 %1.7Mahaska CountyMahaska County: 1.7 %1.7Allamakee CountyAllamakee County: 1.7 %1.7Plymouth CountyPlymouth County: 1.6 %1.6Calhoun CountyCalhoun County: 1.6 %1.6Decatur CountyDecatur County: 1.5 %1.5Floyd CountyFloyd County: 1.5 %1.5Hamilton CountyHamilton County: 1.5 %1.5Palo Alto CountyPalo Alto County: 1.5 %1.5O'Brien CountyO'Brien County: 1.5 %1.5Fayette CountyFayette County: 1.4 %1.4Cherokee CountyCherokee County: 1.4 %1.4Ida CountyIda County: 1.4 %1.4Pottawattamie CountyPottawattamie County: 1.4 %1.4Boone CountyBoone County: 1.2 %1.2Poweshiek CountyPoweshiek County: 1.2 %1.2Hancock CountyHancock County: 1.2 %1.2
%. Source: Invokely calculation with data from U.S. Census Bureau. Retrieved 2026-10-09.

Full ranking

RankCounties2021 (%)
1Black Hawk County9.4
2Johnson County7.1
3Polk County7
4Scott County7
5Jefferson County6.6
6Des Moines County5.9
7Linn County5.8
8Webster County4.3
9Woodbury County3.7
10Crawford County3.5
11Wapello County3.3
12Lee County3
13Dubuque County2.9
14Clinton County2.8
15Buena Vista County2.6
16Muscatine County2.5
17Henry County2.5
18Emmet County2.4
19Story County2.3
20Jones County2.2
21Dallas County2
22Page County1.7
23Jasper County1.7
24Cerro Gordo County1.7
25Mahaska County1.7
26Allamakee County1.7
27Plymouth County1.6
28Calhoun County1.6
29Decatur County1.5
30Floyd County1.5
31Hamilton County1.5
32Palo Alto County1.5
33O'Brien County1.5
34Fayette County1.4
35Cherokee County1.4
36Ida County1.4
37Pottawattamie County1.4
38Boone County1.2
39Poweshiek County1.2
40Hancock County1.2
41Marshall County1.1
42Hardin County1.1
42Shelby County1.1
44Marion County1
45Bremer County0.9
46Winneshiek County0.9
47Tama County0.9
48Sac County0.8
49Cass County0.7
50Warren County0.7
51Grundy County0.7
52Worth County0.7
53Madison County0.7
54Buchanan County0.6
54Louisa County0.6
56Washington County0.6
57Winnebago County0.6
58Osceola County0.6
59Chickasaw County0.6
60Adair County0.6
61Franklin County0.6
62Cedar County0.6
63Audubon County0.5
64Butler County0.5
64Keokuk County0.5
66Jackson County0.5
67Mitchell County0.5
68Fremont County0.4
68Iowa County0.4
68Sioux County0.4
68Union County0.4
72Kossuth County0.4
73Wayne County0.3
74Guthrie County0.3
74Mills County0.3
76Pocahontas County0.3
76Van Buren County0.3
78Benton County0.3
79Clayton County0.3
80Carroll County0.3
80Lucas County0.3
82Howard County0.3
83Wright County0.3
84Monona County0.2
85Humboldt County0.2
86Appanoose County0.2
87Clay County0.2
88Harrison County0.2
89Adams County0.1
89Delaware County0.1
89Greene County0.1
89Lyon County0.1
93Clarke County0.1
93Dickinson County0.1
95Ringgold County0.1
96Montgomery County0.1
97Monroe County0
98Taylor County0
99Davis County0

Other periods

About this ranking

People who are not Hispanic or Latino and report Black or African American as their only race, as a percentage of the total population. United States: American Community Survey five-year estimate, where the period shown is the last year of the five-year span.

US federal statistics ask about Hispanic origin and race separately, and Hispanic or Latino people can be of any race. The shares for White, Black and Asian count people who are not Hispanic and report that race alone, so the published shares do not add up to 100 (people of two or more races and other races are not shown). Calculated from counts in ACS table B03002, which are stored as inputs. EU and Spanish statistics do not collect race.

Every value in the ranking comes from the same publisher and the same period, so the counties are compared on one definition. Equal values share a rank.

How to cite

U.S. Census Bureau. American Community Survey 5-year estimates, table B03002: Black or African American alone, not Hispanic or Latino, as a percentage of the total population, calculated with stored inputs. https://www2.census.gov/programs-surveys/acs/summary_file/2021/table-based-SF/data/5YRData/acsdt5y2021-b03002.dat. Retrieved 2026-10-09.

Use this data in your AI agent

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Rank Counties in Iowa by black or African American population share using official data, and cite the source.
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Questions

Which county has the highest black or African American population share?

Black Hawk County, with 9.4% in 2021, according to the U.S. Census Bureau.

Which county has the lowest black or African American population share?

Davis County, with 0% in 2021.

Where does this ranking come from?

Every value comes from one source and one period, so the places are comparable: U.S. Census Bureau, American Community Survey 5-year estimates, table B03002: Black or African American alone, not Hispanic or Latino, as a percentage of the total population, calculated with stored inputs. Retrieved 2026-10-09.

Black or African American population share: other rankings

Counties in Iowa: more rankings