Ranking of Iowa Counties By Percentage of Population with Unclassified Ancestry in 2021
Updated on April 16, 2025.
Based on the US Census ACS-5Yrs estimates, in 2021, there were 796.79K people in Iowa with Unclassified ancestry (25.06% of Iowa population). Among all Iowa counties, Louisa County had the highest percentage of its population with Unclassified ancestry (38.78%), followed by Appanoose County (38.15%), and Van Buren County (37.51%).
The chart and table below shows the top 10 counties with high percentage of its population having Unclassified ancestry.
You can see similar information for other states and for other ancestry groups in Iowa.
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Related Topics: Iowa ACS-5Yrs Estimates, 2021 Topic List.
Data Source: US Census Bureau.
Ranking of Iowa Counties By Percentage of Population with Unclassified Ancestry in 2021
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| Rank | County | Percentage of Pop. (%) |
|---|---|---|
| 1 | Louisa County | 38.78 |
| 2 | Appanoose County | 38.15 |
| 3 | Van Buren County | 37.51 |
| 4 | Greene County | 36.69 |
| 5 | Muscatine County | 35.80 |
| 6 | Ringgold County | 34.35 |
| 7 | Webster County | 34.34 |
| 8 | Wayne County | 32.73 |
| 9 | Madison County | 32.18 |
| 10 | Decatur County | 32.11 |
| 11 | Emmet County | 31.76 |
| 12 | Lee County | 31.38 |
| 13 | Union County | 31.35 |
| 14 | Des Moines County | 30.95 |
| 15 | Davis County | 30.91 |
| 16 | Montgomery County | 30.37 |
| 17 | Humboldt County | 30.25 |
| 18 | Washington County | 29.92 |
| 19 | Cherokee County | 29.91 |
| 20 | Monroe County | 29.79 |
| 21 | Benton County | 29.75 |
| 22 | Wapello County | 29.53 |
| 23 | Cass County | 29.40 |
| 24 | Taylor County | 29.35 |
| 25 | Keokuk County | 29.23 |
| 26 | Clinton County | 29.15 |
| 27 | Guthrie County | 29.03 |
| 28 | Audubon County | 28.92 |
| 29 | Hardin County | 28.87 |
| 30 | Buchanan County | 28.53 |
| 31 | Clarke County | 28.50 |
| 32 | Jefferson County | 28.39 |
| 33 | Henry County | 28.37 |
| 34 | Page County | 28.17 |
| 35 | Pocahontas County | 27.92 |
| 36 | Poweshiek County | 27.91 |
| 37 | Hancock County | 27.86 |
| 38 | Black Hawk County | 27.77 |
| 39 | Calhoun County | 27.75 |
| 40 | Lucas County | 27.05 |
| 41 | Mills County | 26.91 |
| 42 | Warren County | 26.75 |
| 43 | Boone County | 26.59 |
| 44 | Linn County | 26.49 |
| 45 | Cedar County | 26.38 |
| 46 | Shelby County | 26.33 |
| 47 | O'Brien County | 26.13 |
| 48 | Hamilton County | 26.05 |
| 49 | Grundy County | 26.01 |
| 50 | Cerro Gordo County | 25.82 |
| 51 | Jackson County | 25.79 |
| 52 | Fremont County | 25.72 |
| 53 | Adair County | 25.62 |
| 53 | Jasper County | 25.62 |
| 54 | Clayton County | 25.56 |
| 55 | Marshall County | 25.49 |
| 56 | Tama County | 25.48 |
| 57 | Sac County | 25.47 |
| 58 | Adams County | 25.45 |
| 59 | Delaware County | 25.44 |
| 60 | Marion County | 25.27 |
| 61 | Mahaska County | 25.16 |
| 62 | Worth County | 25.09 |
| 63 | Iowa County | 24.98 |
| 64 | Howard County | 24.91 |
| 65 | Floyd County | 24.87 |
| 66 | Scott County | 24.25 |
| 67 | Story County | 24.21 |
| 68 | Jones County | 24.08 |
| 69 | Mitchell County | 24.06 |
| 70 | Harrison County | 23.96 |
| 71 | Dallas County | 23.92 |
| 72 | Clay County | 23.88 |
| 73 | Chickasaw County | 23.67 |
| 74 | Pottawattamie County | 23.11 |
| 75 | Polk County | 23.07 |
| 76 | Dickinson County | 22.98 |
| 77 | Plymouth County | 22.93 |
| 78 | Fayette County | 22.79 |
| 79 | Bremer County | 22.76 |
| 80 | Butler County | 22.70 |
| 81 | Kossuth County | 22.67 |
| 82 | Carroll County | 22.45 |
| 83 | Monona County | 21.82 |
| 84 | Franklin County | 21.69 |
| 85 | Ida County | 21.57 |
| 86 | Winnebago County | 20.89 |
| 87 | Wright County | 20.70 |
| 88 | Palo Alto County | 20.69 |
| 89 | Dubuque County | 20.60 |
| 90 | Johnson County | 20.21 |
| 91 | Woodbury County | 20.13 |
| 92 | Buena Vista County | 20.00 |
| 93 | Osceola County | 19.54 |
| 94 | Allamakee County | 19.40 |
| 95 | Lyon County | 19.34 |
| 96 | Crawford County | 18.83 |
| 97 | Winneshiek County | 17.09 |
| 98 | Sioux County | 15.67 |
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