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 2023, at 9.5%. Davis County had the lowest, at 0%. The median was 0.8% and the figure for Iowa was 3.8%. Source: the U.S. Census Bureau.

Median0.899 counties
Iowa3.8History

Top 40 counties, 2023

CSVChart (SVG)

Black Hawk CountyBlack Hawk County: 9.5 %9.5Johnson CountyJohnson County: 7.5 %7.5Polk CountyPolk County: 7.4 %7.4Scott CountyScott County: 7 %7Jefferson CountyJefferson County: 5.7 %5.7Linn CountyLinn County: 5.7 %5.7Woodbury CountyWoodbury County: 4.5 %4.5Des Moines CountyDes Moines County: 4.2 %4.2Webster CountyWebster County: 3.2 %3.2Wapello CountyWapello County: 3.1 %3.1Buena Vista CountyBuena Vista County: 3.1 %3.1Dubuque CountyDubuque County: 2.9 %2.9Clinton CountyClinton County: 2.9 %2.9Muscatine CountyMuscatine County: 2.9 %2.9Lee CountyLee County: 2.7 %2.7Story CountyStory County: 2.6 %2.6Henry CountyHenry County: 2.6 %2.6Dallas CountyDallas County: 2.5 %2.5Plymouth CountyPlymouth County: 2.4 %2.4Jones CountyJones County: 2 %2Emmet CountyEmmet County: 2 %2Cerro Gordo CountyCerro Gordo County: 1.9 %1.9Page CountyPage County: 1.8 %1.8Crawford CountyCrawford County: 1.8 %1.8Allamakee CountyAllamakee County: 1.8 %1.8Palo Alto CountyPalo Alto County: 1.7 %1.7Pottawattamie CountyPottawattamie County: 1.7 %1.7Decatur CountyDecatur County: 1.6 %1.6Jasper CountyJasper County: 1.6 %1.6Calhoun CountyCalhoun County: 1.5 %1.5Marshall CountyMarshall County: 1.5 %1.5Mahaska CountyMahaska County: 1.5 %1.5Adair CountyAdair County: 1.4 %1.4O'Brien CountyO'Brien County: 1.3 %1.3Boone CountyBoone County: 1.3 %1.3Hamilton CountyHamilton County: 1.2 %1.2Floyd CountyFloyd County: 1.2 %1.2Poweshiek CountyPoweshiek County: 1.1 %1.1Bremer CountyBremer County: 1.1 %1.1Tama CountyTama County: 1 %1
%. Source: Invokely calculation with data from U.S. Census Bureau. Retrieved 2026-10-09.

Full ranking

RankCounties2023 (%)Change on 2022
1Black Hawk County9.5-0.2 pts
2Johnson County7.5+0.1 pts
3Polk County7.4+0.2 pts
4Scott County7+0.1 pts
5Jefferson County5.7+0.9 pts
6Linn County5.7-0.1 pts
7Woodbury County4.5+0.3 pts
8Des Moines County4.2-1 pts
9Webster County3.2-0.2 pts
10Wapello County3.1+0.1 pts
11Buena Vista County3.1+0.1 pts
12Dubuque County2.9-0.1 pts
13Clinton County2.9-0.1 pts
14Muscatine County2.9+0.1 pts
15Lee County2.7-0.1 pts
16Story County2.6+0.3 pts
17Henry County2.6+0.1 pts
18Dallas County2.5+0.2 pts
19Plymouth County2.4+0.6 pts
20Jones County2-0.3 pts
21Emmet County2-1.6 pts
22Cerro Gordo County1.9+0.5 pts
23Page County1.8+0.3 pts
24Crawford County1.8-0.6 pts
25Allamakee County1.80 pts
26Palo Alto County1.7-0.3 pts
26Pottawattamie County1.7+0.3 pts
28Decatur County1.6+0.4 pts
29Jasper County1.6-0.3 pts
30Calhoun County1.5+0.4 pts
31Marshall County1.5-0.2 pts
32Mahaska County1.5-0.2 pts
33Adair County1.4+0.7 pts
34O'Brien County1.3-0.1 pts
35Boone County1.3-0 pts
36Hamilton County1.2-0.2 pts
37Floyd County1.2+0.2 pts
38Poweshiek County1.1+0.1 pts
39Bremer County1.1-0.1 pts
40Tama County1+0.1 pts
41Hardin County1+0.4 pts
42Appanoose County1+0.6 pts
43Cherokee County0.9-0.5 pts
44Hancock County0.9+0.1 pts
45Worth County0.9-0.2 pts
46Cass County0.9+0.1 pts
46Ida County0.9+0.1 pts
48Fayette County0.80 pts
49Madison County0.80 pts
50Jackson County0.8+0.1 pts
51Buchanan County0.8-0 pts
51Osceola County0.8-0.2 pts
53Chickasaw County0.7-0 pts
54Grundy County0.7-0.1 pts
55Carroll County0.7-0.3 pts
56Winneshiek County0.7-0.1 pts
57Keokuk County0.7+0.1 pts
57Warren County0.7-0 pts
59Clayton County0.6+0.3 pts
60Washington County0.6+0.2 pts
61Pocahontas County0.6+0.4 pts
62Franklin County0.6+0.1 pts
62Sioux County0.6+0.1 pts
64Montgomery County0.6+0.1 pts
64Winnebago County0.60 pts
66Clay County0.6-0 pts
66Kossuth County0.6-0.3 pts
68Marion County0.5-0.1 pts
68Sac County0.5+0.2 pts
70Fremont County0.5-0 pts
70Guthrie County0.50 pts
70Shelby County0.5-0.5 pts
73Cedar County0.5-0 pts
73Union County0.5+0.1 pts
75Iowa County0.40 pts
75Louisa County0.4-0.1 pts
77Mills County0.4+0.1 pts
78Wayne County0.4+0.1 pts
79Adams County0.4+0.1 pts
80Benton County0.4-0 pts
81Mitchell County0.3-0.2 pts
82Humboldt County0.3-0 pts
83Lyon County0.3+0.1 pts
84Audubon County0.3-0 pts
85Monroe County0.2+0.1 pts
85Van Buren County0.2-0.2 pts
87Lucas County0.2-0.1 pts
88Ringgold County0.2+0.1 pts
89Wright County0.20 pts
90Butler County0.2-0.3 pts
91Monona County0.2-0.1 pts
92Greene County0.1-0.1 pts
93Taylor County0.10 pts
94Harrison County0.1-0.1 pts
95Dickinson County0.1-0.1 pts
96Howard County0.1-0.1 pts
97Clarke County00 pts
98Delaware County00 pts
99Davis County00 pts

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/2023/table-based-SF/data/5YRData/acsdt5y2023-b03002.dat. Retrieved 2026-10-09.

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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 9.5% in 2023, according to the U.S. Census Bureau.

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

Davis County, with 0% in 2023.

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