Ranking of Iowa Counties By Population with European Ancestry in 2021
Updated on April 16, 2025.
Based on the US Census ACS-5Yrs estimates, in 2021, there were 50.96K people in Iowa with European ancestry. Among all Iowa counties, Polk County had the highest population with European ancestry (9.81K), followed by Linn County (4.71K), and Johnson County (3.89K).
The chart and table below shows the top 10 counties with high number of people with European 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 Population with European Ancestry in 2021
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| Rank | County | Population |
|---|---|---|
| 1 | Polk County | 9814 |
| 2 | Linn County | 4712 |
| 3 | Johnson County | 3885 |
| 4 | Scott County | 2496 |
| 5 | Black Hawk County | 2279 |
| 6 | Dallas County | 1973 |
| 7 | Story County | 1690 |
| 8 | Dubuque County | 1479 |
| 9 | Pottawattamie County | 1398 |
| 10 | Woodbury County | 1392 |
| 11 | Warren County | 1079 |
| 12 | Des Moines County | 788 |
| 13 | Jasper County | 729 |
| 14 | Cerro Gordo County | 717 |
| 15 | Webster County | 621 |
| 16 | Marshall County | 613 |
| 17 | Muscatine County | 535 |
| 18 | Benton County | 528 |
| 19 | Lee County | 505 |
| 20 | Marion County | 493 |
| 21 | Sioux County | 447 |
| 22 | Wapello County | 417 |
| 23 | Jefferson County | 401 |
| 24 | Cedar County | 398 |
| 25 | Poweshiek County | 385 |
| 26 | Mahaska County | 372 |
| 27 | Boone County | 360 |
| 28 | Jones County | 330 |
| 29 | Winneshiek County | 328 |
| 30 | Washington County | 325 |
| 31 | Bremer County | 324 |
| 31 | Henry County | 324 |
| 32 | Mills County | 310 |
| 33 | Carroll County | 289 |
| 34 | Fayette County | 279 |
| 35 | Clinton County | 266 |
| 36 | Iowa County | 258 |
| 37 | Madison County | 253 |
| 38 | Buchanan County | 241 |
| 39 | Jackson County | 232 |
| 40 | Buena Vista County | 219 |
| 41 | Fremont County | 217 |
| 42 | Monroe County | 203 |
| 43 | Guthrie County | 202 |
| 44 | Cass County | 197 |
| 45 | Clayton County | 196 |
| 46 | Lyon County | 195 |
| 47 | Harrison County | 180 |
| 48 | Plymouth County | 176 |
| 49 | Delaware County | 175 |
| 50 | Tama County | 170 |
| 51 | Cherokee County | 165 |
| 52 | Keokuk County | 159 |
| 53 | Grundy County | 158 |
| 54 | Hancock County | 155 |
| 55 | Adair County | 148 |
| 56 | Floyd County | 143 |
| 57 | Calhoun County | 141 |
| 58 | Butler County | 137 |
| 59 | Crawford County | 136 |
| 60 | Allamakee County | 134 |
| 60 | Monona County | 134 |
| 61 | Page County | 133 |
| 62 | Dickinson County | 130 |
| 63 | Louisa County | 126 |
| 64 | Taylor County | 124 |
| 65 | Decatur County | 122 |
| 66 | Davis County | 120 |
| 66 | Wayne County | 120 |
| 67 | Lucas County | 116 |
| 68 | Clay County | 115 |
| 69 | Clarke County | 107 |
| 69 | Hardin County | 107 |
| 70 | Emmet County | 100 |
| 71 | Palo Alto County | 97 |
| 72 | Pocahontas County | 91 |
| 73 | Franklin County | 90 |
| 74 | Winnebago County | 89 |
| 75 | Van Buren County | 87 |
| 76 | Worth County | 85 |
| 77 | Union County | 77 |
| 78 | Mitchell County | 74 |
| 79 | Shelby County | 70 |
| 80 | Wright County | 69 |
| 81 | Hamilton County | 68 |
| 82 | O'Brien County | 57 |
| 83 | Appanoose County | 56 |
| 84 | Adams County | 55 |
| 85 | Greene County | 53 |
| 85 | Howard County | 53 |
| 86 | Humboldt County | 45 |
| 86 | Sac County | 45 |
| 87 | Kossuth County | 44 |
| 88 | Montgomery County | 43 |
| 89 | Chickasaw County | 40 |
| 90 | Audubon County | 38 |
| 90 | Ringgold County | 38 |
| 91 | Osceola County | 35 |
| 92 | Ida County | 34 |
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