Ranking of Iowa Counties By Percentage of Population that are Black or African American Alone in 2010

Updated on June 18, 2025.

Based on the US Census Vintage data estimates, in 2010, among all Iowa counties, Black Hawk County had the highest percentage of its population who identified their race as Black or African American Alone (8.99%), followed by Scott County (7.22%), and Polk County (6.23%).

The chart below shows the top 10 counties, and the table below shows the ranking of all Iowa counties.

You can see similar ranking information for other racial and ethnicity groups in the United States.

You can also see similar information for other states, and also the ranking of all counties in the United States.

You may also be interested in:
Ranking of Iowa Counties By Black or African American Alone Population in 2010

Related Topics: Iowa Census Vintage Data Topic List.

Data Source: US Census Bureau (Vintage).

See this for other years:

Ranking of Iowa Counties By Percentage of Pop. that are Black or African American Alone in 2010

Black Hawk

Scott

Polk

Des Moines

Johnson

Linn

Webster

Lee

Buena Vista

Dubuque

Ranking of Iowa Counties By Percentage of Pop. that are Black or African American Alone in 2010

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Rank	County	% of County Population
1	Black Hawk County	8.99
2	Scott County	7.22
3	Polk County	6.23
4	Des Moines County	5.12
5	Johnson County	4.99
6	Linn County	4.02
7	Webster County	3.92
8	Lee County	3.17
9	Buena Vista County	2.89
10	Dubuque County	2.74
11	Clinton County	2.65
12	Story County	2.61
13	Woodbury County	2.53
14	Henry County	2.31
15	Page County	2.28
16	Jones County	1.98
17	Marshall County	1.86
18	Decatur County	1.84
19	Calhoun County	1.63
20	Muscatine County	1.6
21	Crawford County	1.5
22	Wapello County	1.49
23	Dallas County	1.44
24	Pottawattamie County	1.42
25	Cerro Gordo County	1.35
25	Jefferson County	1.35
26	Jasper County	1.29
27	Hardin County	1.27
28	Floyd County	1.26
29	Poweshiek County	1.23
30	Mahaska County	1.14
31	Fayette County	0.98
32	Allamakee County	0.91
32	Winnebago County	0.91
33	Bremer County	0.83
34	Union County	0.81
35	Boone County	0.79
36	Emmet County	0.72
36	Washington County	0.72
37	Marion County	0.7
38	Winneshiek County	0.66
39	O'Brien County	0.64
40	Louisa County	0.63
41	Palo Alto County	0.6
42	Cherokee County	0.59
43	Franklin County	0.57
44	Clarke County	0.55
45	Fremont County	0.54
45	Humboldt County	0.54
46	Hancock County	0.51
47	Appanoose County	0.5
47	Wright County	0.5
48	Warren County	0.49
49	Worth County	0.48
50	Sioux County	0.47
51	Keokuk County	0.46
52	Clay County	0.45
53	Carroll County	0.44
54	Hamilton County	0.42
55	Tama County	0.41
56	Benton County	0.39
56	Mills County	0.39
57	Iowa County	0.38
57	Pocahontas County	0.38
58	Chickasaw County	0.37
58	Clayton County	0.37
58	Madison County	0.37
58	Osceola County	0.37
59	Monona County	0.36
60	Ringgold County	0.35
61	Monroe County	0.34
61	Plymouth County	0.34
62	Jackson County	0.33
62	Taylor County	0.33
63	Buchanan County	0.32
63	Sac County	0.32
64	Wayne County	0.3
65	Cedar County	0.29
65	Greene County	0.29
65	Howard County	0.29
65	Kossuth County	0.29
66	Cass County	0.27
66	Delaware County	0.27
66	Shelby County	0.27
67	Lucas County	0.25
68	Ida County	0.24
69	Audubon County	0.23
69	Grundy County	0.23
69	Montgomery County	0.23
70	Van Buren County	0.21
71	Adams County	0.2
72	Mitchell County	0.18
73	Butler County	0.17
73	Dickinson County	0.17
73	Harrison County	0.17
74	Adair County	0.16
74	Guthrie County	0.16
75	Lyon County	0.14
76	Davis County	0.08