Ranking of Iowa Counties By Percentage of Population that are Black or African American Alone in 2015

Updated on June 18, 2025.

Based on the US Census Vintage data estimates, in 2015, among all Iowa counties, Black Hawk County had the highest percentage of its population who identified their race as Black or African American Alone (9.28%), followed by Scott County (7.62%), and Polk County (6.78%).

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 2015

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 2015

Black Hawk

Scott

Polk

Johnson

Des Moines

Linn

Webster

Dubuque

Woodbury

Wapello

Ranking of Iowa Counties By Percentage of Pop. that are Black or African American Alone in 2015

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Rank	County	% of County Population
1	Black Hawk County	9.28
2	Scott County	7.62
3	Polk County	6.78
4	Johnson County	6.64
5	Des Moines County	5.88
6	Linn County	4.91
7	Webster County	4.32
8	Dubuque County	3.17
9	Woodbury County	3.15
10	Wapello County	3.13
11	Buena Vista County	3.04
12	Lee County	2.98
13	Clinton County	2.96
14	Crawford County	2.83
15	Story County	2.76
16	Muscatine County	2.58
17	Henry County	2.5
17	Page County	2.5
18	Jones County	2.43
19	Floyd County	2.36
20	Jefferson County	2.21
21	Calhoun County	2
22	Marshall County	1.95
23	Dallas County	1.87
24	Jasper County	1.86
25	Decatur County	1.78
26	Pottawattamie County	1.68
27	Winnebago County	1.53
28	Poweshiek County	1.52
29	Mahaska County	1.49
30	Allamakee County	1.47
31	Cerro Gordo County	1.46
32	Hardin County	1.43
33	Palo Alto County	1.29
34	Fayette County	1.24
35	Union County	1.14
36	Boone County	1.13
37	Pocahontas County	1.06
38	Bremer County	1.02
39	Clarke County	0.98
39	Louisa County	0.98
40	Hamilton County	0.97
40	Worth County	0.97
41	Carroll County	0.95
42	Washington County	0.93
43	Cherokee County	0.92
44	Emmet County	0.91
44	Monroe County	0.91
44	O'Brien County	0.91
45	Franklin County	0.89
46	Hancock County	0.87
47	Shelby County	0.84
48	Marion County	0.83
49	Winneshiek County	0.82
50	Clayton County	0.81
51	Wright County	0.76
52	Clay County	0.75
52	Warren County	0.75
53	Sioux County	0.73
54	Kossuth County	0.71
55	Plymouth County	0.69
56	Jackson County	0.68
57	Chickasaw County	0.64
57	Fremont County	0.64
58	Appanoose County	0.62
59	Mills County	0.6
60	Osceola County	0.58
61	Humboldt County	0.57
62	Iowa County	0.55
63	Keokuk County	0.54
64	Taylor County	0.53
65	Benton County	0.52
65	Madison County	0.52
65	Mitchell County	0.52
66	Ringgold County	0.5
67	Howard County	0.49
67	Montgomery County	0.49
68	Buchanan County	0.48
69	Audubon County	0.47
69	Greene County	0.47
69	Tama County	0.47
70	Cedar County	0.44
70	Wayne County	0.44
71	Monona County	0.41
72	Guthrie County	0.39
72	Ida County	0.39
73	Delaware County	0.38
74	Dickinson County	0.37
74	Grundy County	0.37
75	Adair County	0.35
76	Lucas County	0.33
77	Cass County	0.32
77	Harrison County	0.32
77	Lyon County	0.32
78	Butler County	0.29
79	Adams County	0.27
79	Sac County	0.27
80	Van Buren County	0.23
81	Davis County	0.21