Rank County Percentage White, Not Hispanic or Latino, Residents
1 Lucas County, Iowa 97.7%
2 Delaware County, Iowa 97.7%
3 Mitchell County, Iowa 97.7%
4 Grundy County, Iowa 97.6%
5 Adair County, Iowa 97.6%
6 Audubon County, Iowa 97.6%
7 Davis County, Iowa 97.4%
8 Butler County, Iowa 97.4%
9 Van Buren County, Iowa 97.4%
10 Howard County, Iowa 97.2%
11 Keokuk County, Iowa 97.2%
12 Dickinson County, Iowa 97.1%
13 Adams County, Iowa 97.1%
14 Harrison County, Iowa 97.0%
15 Benton County, Iowa 97.0%
16 Wayne County, Iowa 96.8%
17 Madison County, Iowa 96.8%
18 Buchanan County, Iowa 96.8%
19 Kossuth County, Iowa 96.7%
20 Ida County, Iowa 96.7%
21 Lyon County, Iowa 96.7%
22 Clayton County, Iowa 96.6%
23 Ringgold County, Iowa 96.4%
24 Iowa County, Iowa 96.4%
25 Chickasaw County, Iowa 96.3%
26 Appanoose County, Iowa 96.3%
27 Shelby County, Iowa 96.3%
28 Sac County, Iowa 96.3%
29 Guthrie County, Iowa 96.3%
30 Bremer County, Iowa 96.2%
31 Jackson County, Iowa 96.2%
32 Cedar County, Iowa 96.2%
33 Carroll County, Iowa 96.1%
34 Worth County, Iowa 96.0%
35 Palo Alto County, Iowa 96.0%
36 Cass County, Iowa 96.0%
37 Monona County, Iowa 95.7%
38 Warren County, Iowa 95.6%
39 Fremont County, Iowa 95.6%
40 Monroe County, Iowa 95.6%
41 Union County, Iowa 95.5%
42 Greene County, Iowa 95.5%
43 Jasper County, Iowa 95.5%
44 Boone County, Iowa 95.4%
45 Winneshiek County, Iowa 95.4%
46 Calhoun County, Iowa 95.4%
47 Marion County, Iowa 95.1%
48 Mills County, Iowa 95.1%
49 Montgomery County, Iowa 95.1%
50 Jones County, Iowa 95.0%
51 Fayette County, Iowa 95.0%
52 Pocahontas County, Iowa 95.0%
53 Cherokee County, Iowa 94.8%
54 Clay County, Iowa 94.7%
55 Mahaska County, Iowa 94.7%
56 Plymouth County, Iowa 94.6%
57 Hancock County, Iowa 94.5%
58 Floyd County, Iowa 94.4%
59 Humboldt County, Iowa 94.3%
60 Winnebago County, Iowa 94.0%
61 OBrien County, Iowa 94.0%
62 Hardin County, Iowa 93.5%
63 Poweshiek County, Iowa 93.4%
64 Decatur County, Iowa 93.3%
65 Dubuque County, Iowa 92.7%
66 Osceola County, Iowa 92.3%
67 Cerro Gordo County, Iowa 92.3%
68 Washington County, Iowa 92.2%
69 Page County, Iowa 92.1%
70 Clinton County, Iowa 92.1%
71 Allamakee County, Iowa 91.7%
72 Taylor County, Iowa 91.4%
73 Lee County, Iowa 91.2%
74 Hamilton County, Iowa 91.0%
75 Webster County, Iowa 89.5%
76 Pottawattamie County, Iowa 89.4%
77 Des Moines County, Iowa 88.9%
78 Sioux County, Iowa 88.8%
79 Henry County, Iowa 88.8%
80 Linn County, Iowa 88.7%
81 Wright County, Iowa 88.6%
82 Emmet County, Iowa 88.1%
83 Dallas County, Iowa 87.9%
84 Franklin County, Iowa 87.2%
85 Clarke County, Iowa 87.1%
86 Wapello County, Iowa 86.6%
87 Story County, Iowa 86.4%
88 Jefferson County, Iowa 85.6%
89 Tama County, Iowa 83.6%
90 Black Hawk County, Iowa 83.6%
91 Johnson County, Iowa 82.4%
92 Scott County, Iowa 82.3%
93 Louisa County, Iowa 80.2%
94 Polk County, Iowa 80.1%
95 Muscatine County, Iowa 79.6%
96 Woodbury County, Iowa 77.0%
97 Marshall County, Iowa 76.1%
98 Crawford County, Iowa 70.2%
99 Buena Vista County, Iowa 65.1%

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