Ranking of Iowa Counties By Non-Hispanic White Population in 2018
Updated on June 18, 2025.
Based on the US Census Vintage data estimates, in 2018, among all Iowa counties, Polk County had the highest number of people who identified their ethnicity as Non-Hispanic White (375.26K), followed by Linn County (192.96K), and Scott County (137.72K).
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 Non-Hispanic White Population in 2018
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| Rank | County | Non-Hispanic White Population |
|---|---|---|
| 1 | Polk County | 375262 |
| 2 | Linn County | 192955 |
| 3 | Scott County | 137721 |
| 4 | Johnson County | 117542 |
| 5 | Black Hawk County | 106175 |
| 6 | Dubuque County | 87711 |
| 7 | Pottawattamie County | 81663 |
| 8 | Story County | 81039 |
| 9 | Dallas County | 76503 |
| 10 | Woodbury County | 73998 |
| 11 | Warren County | 47974 |
| 12 | Clinton County | 42400 |
| 13 | Cerro Gordo County | 38464 |
| 14 | Jasper County | 34642 |
| 15 | Des Moines County | 34084 |
| 16 | Muscatine County | 32850 |
| 17 | Webster County | 31471 |
| 18 | Marion County | 31384 |
| 19 | Lee County | 30785 |
| 20 | Sioux County | 30158 |
| 21 | Wapello County | 28639 |
| 22 | Marshall County | 27890 |
| 23 | Boone County | 24836 |
| 24 | Benton County | 24590 |
| 25 | Bremer County | 23747 |
| 26 | Plymouth County | 22910 |
| 27 | Mahaska County | 20579 |
| 28 | Buchanan County | 20309 |
| 29 | Washington County | 20036 |
| 30 | Jones County | 19332 |
| 31 | Carroll County | 19034 |
| 32 | Winneshiek County | 19028 |
| 33 | Jackson County | 18479 |
| 34 | Fayette County | 18368 |
| 35 | Cedar County | 17651 |
| 36 | Henry County | 17622 |
| 37 | Poweshiek County | 16863 |
| 38 | Clayton County | 16792 |
| 39 | Delaware County | 16497 |
| 40 | Dickinson County | 16393 |
| 41 | Hardin County | 15570 |
| 42 | Madison County | 15348 |
| 43 | Iowa County | 15294 |
| 44 | Clay County | 15070 |
| 45 | Jefferson County | 14740 |
| 46 | Floyd County | 14323 |
| 47 | Mills County | 14203 |
| 48 | Butler County | 14019 |
| 49 | Kossuth County | 13985 |
| 50 | Page County | 13807 |
| 51 | Harrison County | 13499 |
| 52 | Tama County | 13497 |
| 53 | Hamilton County | 13250 |
| 54 | O'Brien County | 12715 |
| 55 | Allamakee County | 12471 |
| 56 | Cass County | 12298 |
| 57 | Grundy County | 11886 |
| 58 | Appanoose County | 11837 |
| 59 | Buena Vista County | 11545 |
| 60 | Union County | 11510 |
| 61 | Chickasaw County | 11419 |
| 62 | Lyon County | 11287 |
| 63 | Crawford County | 11136 |
| 64 | Shelby County | 10918 |
| 65 | Wright County | 10760 |
| 66 | Cherokee County | 10497 |
| 67 | Mitchell County | 10205 |
| 68 | Guthrie County | 10150 |
| 69 | Hancock County | 9963 |
| 70 | Keokuk County | 9822 |
| 71 | Winnebago County | 9607 |
| 72 | Montgomery County | 9335 |
| 73 | Sac County | 9156 |
| 74 | Calhoun County | 9081 |
| 75 | Howard County | 8866 |
| 76 | Humboldt County | 8845 |
| 77 | Louisa County | 8668 |
| 78 | Davis County | 8665 |
| 79 | Franklin County | 8519 |
| 80 | Greene County | 8451 |
| 81 | Palo Alto County | 8296 |
| 82 | Lucas County | 8251 |
| 83 | Monona County | 8160 |
| 84 | Emmet County | 8075 |
| 85 | Clarke County | 7721 |
| 86 | Monroe County | 7348 |
| 87 | Decatur County | 7289 |
| 88 | Worth County | 6994 |
| 89 | Adair County | 6728 |
| 90 | Van Buren County | 6727 |
| 91 | Fremont County | 6569 |
| 92 | Ida County | 6496 |
| 93 | Pocahontas County | 6240 |
| 94 | Wayne County | 6131 |
| 95 | Taylor County | 5580 |
| 96 | Osceola County | 5342 |
| 97 | Audubon County | 5281 |
| 98 | Ringgold County | 4661 |
| 99 | Adams County | 3495 |
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