Ranking of Iowa Counties By Percentage of Population with British Ancestry in 2021
Updated on April 16, 2025.
Based on the US Census ACS-5Yrs estimates, in 2021, there were 15.54K people in Iowa with British ancestry (0.49% of Iowa population). Among all Iowa counties, Jefferson County had the highest percentage of its population with British ancestry (1.20%), followed by Story County (0.98%), and Wapello County (0.95%).
The chart and table below shows the top 10 counties with high percentage of its population having British 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 British Ancestry in 2021
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| Rank | County | Percentage of Pop. (%) |
|---|---|---|
| 1 | Jefferson County | 1.20 |
| 2 | Story County | 0.98 |
| 3 | Wapello County | 0.95 |
| 4 | Muscatine County | 0.90 |
| 5 | Union County | 0.89 |
| 6 | Greene County | 0.88 |
| 7 | Poweshiek County | 0.80 |
| 8 | Madison County | 0.79 |
| 9 | Warren County | 0.75 |
| 10 | Linn County | 0.74 |
| 10 | Monroe County | 0.74 |
| 11 | Dallas County | 0.73 |
| 11 | Marion County | 0.73 |
| 12 | Johnson County | 0.71 |
| 13 | Montgomery County | 0.70 |
| 13 | Wright County | 0.70 |
| 14 | Lee County | 0.69 |
| 15 | Emmet County | 0.65 |
| 16 | Hamilton County | 0.64 |
| 17 | Boone County | 0.58 |
| 17 | Scott County | 0.58 |
| 18 | Decatur County | 0.57 |
| 19 | Polk County | 0.55 |
| 19 | Sac County | 0.55 |
| 20 | Benton County | 0.53 |
| 21 | Audubon County | 0.51 |
| 22 | Keokuk County | 0.49 |
| 23 | Cedar County | 0.46 |
| 24 | Woodbury County | 0.44 |
| 25 | Black Hawk County | 0.42 |
| 25 | Cherokee County | 0.42 |
| 26 | Hancock County | 0.41 |
| 26 | Marshall County | 0.41 |
| 27 | Des Moines County | 0.39 |
| 27 | Hardin County | 0.39 |
| 28 | Henry County | 0.38 |
| 29 | Lucas County | 0.37 |
| 29 | Washington County | 0.37 |
| 29 | Winnebago County | 0.37 |
| 30 | Fremont County | 0.36 |
| 30 | Jasper County | 0.36 |
| 30 | Pottawattamie County | 0.36 |
| 31 | Tama County | 0.35 |
| 32 | Clayton County | 0.34 |
| 32 | Harrison County | 0.34 |
| 33 | Dubuque County | 0.33 |
| 34 | Appanoose County | 0.32 |
| 34 | Calhoun County | 0.32 |
| 34 | Taylor County | 0.32 |
| 34 | Wayne County | 0.32 |
| 35 | Bremer County | 0.31 |
| 35 | Fayette County | 0.31 |
| 35 | Franklin County | 0.31 |
| 36 | Clinton County | 0.30 |
| 37 | Clay County | 0.29 |
| 38 | Howard County | 0.28 |
| 38 | Iowa County | 0.28 |
| 38 | Webster County | 0.28 |
| 39 | Cass County | 0.27 |
| 39 | Mills County | 0.27 |
| 40 | Winneshiek County | 0.26 |
| 41 | Butler County | 0.24 |
| 41 | Carroll County | 0.24 |
| 41 | Davis County | 0.24 |
| 41 | Jackson County | 0.24 |
| 42 | Cerro Gordo County | 0.22 |
| 42 | Monona County | 0.22 |
| 43 | Kossuth County | 0.21 |
| 43 | Plymouth County | 0.21 |
| 44 | Sioux County | 0.19 |
| 45 | Humboldt County | 0.18 |
| 45 | Pocahontas County | 0.18 |
| 46 | Clarke County | 0.16 |
| 46 | Grundy County | 0.16 |
| 46 | Guthrie County | 0.16 |
| 46 | Lyon County | 0.16 |
| 47 | Dickinson County | 0.15 |
| 48 | Buchanan County | 0.12 |
| 48 | Mahaska County | 0.12 |
| 49 | Buena Vista County | 0.11 |
| 49 | Chickasaw County | 0.11 |
| 49 | Ringgold County | 0.11 |
| 50 | Louisa County | 0.10 |
| 51 | Page County | 0.09 |
| 51 | Shelby County | 0.09 |
| 52 | Delaware County | 0.07 |
| 53 | Ida County | 0.06 |
| 53 | Palo Alto County | 0.06 |
| 53 | Van Buren County | 0.06 |
| 54 | Jones County | 0.05 |
| 55 | Adair County | 0.04 |
| 55 | Floyd County | 0.04 |
| 55 | O'Brien County | 0.04 |
| 55 | Worth County | 0.04 |
| 56 | Adams County | 0.03 |
| 56 | Allamakee County | 0.03 |
| 56 | Crawford County | 0.03 |
| 57 | Osceola County | 0.02 |
| 58 | Mitchell County | 0.01 |
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