Ranking of Iowa Counties By Percentage of Population with Dutch Ancestry in 2021
Updated on April 16, 2025.
Based on the US Census ACS-5Yrs estimates, in 2021, there were 114.55K people in Iowa with Dutch ancestry (3.60% of Iowa population). Among all Iowa counties, Sioux County had the highest percentage of its population with Dutch ancestry (45.38%), followed by Lyon County (30.87%), and O'Brien County (22.10%).
The chart and table below shows the top 10 counties with high percentage of its population having Dutch 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 Dutch Ancestry in 2021
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| Rank | County | Percentage of Pop. (%) |
|---|---|---|
| 1 | Sioux County | 45.38 |
| 2 | Lyon County | 30.87 |
| 3 | O'Brien County | 22.10 |
| 4 | Marion County | 17.49 |
| 5 | Osceola County | 15.79 |
| 6 | Mahaska County | 14.94 |
| 7 | Jasper County | 12.89 |
| 8 | Poweshiek County | 8.05 |
| 9 | Davis County | 8.01 |
| 10 | Wayne County | 7.27 |
| 11 | Plymouth County | 6.93 |
| 12 | Monroe County | 6.72 |
| 13 | Dickinson County | 5.51 |
| 14 | Keokuk County | 5.01 |
| 15 | Butler County | 4.67 |
| 16 | Wapello County | 4.58 |
| 17 | Cherokee County | 4.32 |
| 18 | Sac County | 4.22 |
| 18 | Van Buren County | 4.22 |
| 19 | Winnebago County | 4.03 |
| 20 | Grundy County | 3.85 |
| 21 | Boone County | 3.78 |
| 21 | Warren County | 3.78 |
| 22 | Mills County | 3.74 |
| 23 | Clinton County | 3.72 |
| 24 | Iowa County | 3.70 |
| 25 | Clarke County | 3.62 |
| 26 | Clay County | 3.48 |
| 27 | Union County | 3.44 |
| 28 | Hancock County | 3.27 |
| 29 | Madison County | 3.13 |
| 30 | Lucas County | 3.08 |
| 31 | Woodbury County | 3.06 |
| 32 | Polk County | 3.03 |
| 33 | Appanoose County | 2.91 |
| 34 | Cass County | 2.88 |
| 35 | Ida County | 2.87 |
| 36 | Washington County | 2.82 |
| 37 | Dallas County | 2.81 |
| 37 | Monona County | 2.81 |
| 38 | Story County | 2.75 |
| 39 | Harrison County | 2.65 |
| 40 | Guthrie County | 2.63 |
| 41 | Cerro Gordo County | 2.57 |
| 42 | Emmet County | 2.54 |
| 43 | Audubon County | 2.51 |
| 44 | Kossuth County | 2.50 |
| 45 | Jefferson County | 2.47 |
| 46 | Franklin County | 2.43 |
| 47 | Decatur County | 2.42 |
| 48 | Palo Alto County | 2.36 |
| 49 | Howard County | 2.35 |
| 50 | Adams County | 2.33 |
| 51 | Ringgold County | 2.28 |
| 52 | Des Moines County | 2.26 |
| 53 | Hardin County | 2.24 |
| 54 | Adair County | 2.23 |
| 55 | Benton County | 2.20 |
| 56 | Buchanan County | 2.19 |
| 56 | Greene County | 2.19 |
| 56 | Marshall County | 2.19 |
| 57 | Page County | 2.16 |
| 57 | Worth County | 2.16 |
| 58 | Henry County | 2.13 |
| 58 | Wright County | 2.13 |
| 59 | Jones County | 2.05 |
| 60 | Buena Vista County | 2.01 |
| 61 | Johnson County | 2.00 |
| 62 | Mitchell County | 1.97 |
| 63 | Linn County | 1.96 |
| 64 | Floyd County | 1.94 |
| 65 | Bremer County | 1.91 |
| 65 | Calhoun County | 1.91 |
| 65 | Taylor County | 1.91 |
| 66 | Webster County | 1.81 |
| 67 | Scott County | 1.80 |
| 68 | Muscatine County | 1.79 |
| 69 | Pottawattamie County | 1.73 |
| 70 | Black Hawk County | 1.71 |
| 70 | Hamilton County | 1.71 |
| 71 | Cedar County | 1.70 |
| 72 | Chickasaw County | 1.67 |
| 73 | Pocahontas County | 1.65 |
| 74 | Fremont County | 1.64 |
| 75 | Dubuque County | 1.57 |
| 75 | Fayette County | 1.57 |
| 76 | Tama County | 1.56 |
| 77 | Montgomery County | 1.48 |
| 78 | Crawford County | 1.47 |
| 79 | Humboldt County | 1.41 |
| 80 | Delaware County | 1.26 |
| 81 | Carroll County | 1.25 |
| 82 | Louisa County | 1.16 |
| 83 | Lee County | 1.12 |
| 84 | Allamakee County | 0.93 |
| 85 | Clayton County | 0.90 |
| 86 | Shelby County | 0.80 |
| 87 | Winneshiek County | 0.69 |
| 88 | Jackson County | 0.66 |
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