Ranking of Iowa Counties By Percentage of Population that are White Alone in 2015
Updated on June 18, 2025.
Based on the US Census Vintage data estimates, in 2015, among all Iowa counties, Delaware County had the highest percentage of its population who identified their race as White Alone (98.36%), followed by Lucas County (98.34%), and Chickasaw County (98.26%).
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.
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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
White Alone in 2015
Items per page:
25
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| Rank | County | % of County Population |
|---|---|---|
| 1 | Delaware County | 98.36 |
| 2 | Lucas County | 98.34 |
| 3 | Chickasaw County | 98.26 |
| 4 | Davis County | 98.25 |
| 5 | Lyon County | 98.23 |
| 6 | Grundy County | 98.22 |
| 7 | Adair County | 98.21 |
| 8 | Keokuk County | 98.19 |
| 9 | Mitchell County | 98.17 |
| 10 | Howard County | 98.16 |
| 11 | Van Buren County | 98.15 |
| 12 | Audubon County | 98.02 |
| 12 | Sac County | 98.02 |
| 13 | Harrison County | 97.98 |
| 14 | Ringgold County | 97.93 |
| 15 | Butler County | 97.91 |
| 16 | Adams County | 97.89 |
| 17 | Wayne County | 97.88 |
| 18 | Ida County | 97.85 |
| 19 | Clayton County | 97.82 |
| 20 | Cass County | 97.81 |
| 21 | Benton County | 97.8 |
| 22 | Buchanan County | 97.79 |
| 22 | Guthrie County | 97.79 |
| 23 | Iowa County | 97.78 |
| 24 | Dickinson County | 97.77 |
| 24 | Taylor County | 97.77 |
| 25 | Humboldt County | 97.68 |
| 26 | Fremont County | 97.61 |
| 27 | Greene County | 97.58 |
| 28 | Cedar County | 97.57 |
| 29 | Kossuth County | 97.53 |
| 29 | Montgomery County | 97.53 |
| 30 | Madison County | 97.44 |
| 30 | Shelby County | 97.44 |
| 31 | Hancock County | 97.41 |
| 32 | Monroe County | 97.37 |
| 33 | Carroll County | 97.32 |
| 34 | Appanoose County | 97.28 |
| 35 | Osceola County | 97.24 |
| 36 | Mills County | 97.17 |
| 36 | Winneshiek County | 97.17 |
| 37 | Clay County | 97.13 |
| 38 | Warren County | 97.06 |
| 39 | O'Brien County | 97.05 |
| 40 | Jackson County | 97.03 |
| 41 | Cherokee County | 96.95 |
| 41 | Washington County | 96.95 |
| 42 | Sioux County | 96.92 |
| 43 | Worth County | 96.91 |
| 44 | Union County | 96.84 |
| 45 | Monona County | 96.83 |
| 46 | Franklin County | 96.82 |
| 47 | Wright County | 96.79 |
| 48 | Boone County | 96.78 |
| 49 | Plymouth County | 96.7 |
| 50 | Bremer County | 96.66 |
| 51 | Allamakee County | 96.57 |
| 52 | Marion County | 96.46 |
| 53 | Pocahontas County | 96.44 |
| 54 | Palo Alto County | 96.42 |
| 55 | Calhoun County | 96.4 |
| 55 | Clarke County | 96.4 |
| 56 | Fayette County | 96.35 |
| 57 | Hardin County | 96.19 |
| 58 | Jasper County | 96 |
| 59 | Winnebago County | 95.95 |
| 60 | Jones County | 95.89 |
| 61 | Mahaska County | 95.61 |
| 62 | Cerro Gordo County | 95.48 |
| 63 | Decatur County | 95.46 |
| 64 | Hamilton County | 95.16 |
| 65 | Emmet County | 94.99 |
| 66 | Pottawattamie County | 94.93 |
| 67 | Floyd County | 94.68 |
| 68 | Poweshiek County | 94.67 |
| 69 | Page County | 94.34 |
| 70 | Lee County | 94.21 |
| 71 | Clinton County | 94.07 |
| 72 | Muscatine County | 94.06 |
| 73 | Wapello County | 93.42 |
| 74 | Dubuque County | 93.35 |
| 75 | Louisa County | 93.09 |
| 76 | Henry County | 92.87 |
| 77 | Crawford County | 92.68 |
| 78 | Marshall County | 92.09 |
| 79 | Webster County | 92 |
| 80 | Dallas County | 91.81 |
| 81 | Des Moines County | 90.29 |
| 82 | Linn County | 89.73 |
| 83 | Tama County | 88.26 |
| 84 | Woodbury County | 88.2 |
| 85 | Story County | 87.11 |
| 86 | Scott County | 86.3 |
| 87 | Polk County | 86 |
| 88 | Black Hawk County | 85.54 |
| 89 | Buena Vista County | 84.72 |
| 90 | Johnson County | 84.21 |
| 91 | Jefferson County | 83.52 |