Ranking of Iowa Counties By Non-Hispanic White Population in 2015
Updated on June 18, 2025.
Based on the US Census Vintage data estimates, in 2015, among all Iowa counties, Polk County had the highest number of people who identified their ethnicity as Non-Hispanic White (367.92K), followed by Linn County (191.95K), and Scott County (138.93K).
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 2015
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| Rank | County | Non-Hispanic White Population |
|---|---|---|
| 1 | Polk County | 367919 |
| 2 | Linn County | 191946 |
| 3 | Scott County | 138930 |
| 4 | Johnson County | 115340 |
| 5 | Black Hawk County | 109526 |
| 6 | Dubuque County | 88559 |
| 7 | Pottawattamie County | 82546 |
| 8 | Story County | 81680 |
| 9 | Woodbury County | 76668 |
| 10 | Dallas County | 69608 |
| 11 | Warren County | 45958 |
| 12 | Clinton County | 43551 |
| 13 | Cerro Gordo County | 39225 |
| 14 | Des Moines County | 35089 |
| 15 | Jasper County | 34622 |
| 16 | Muscatine County | 33456 |
| 17 | Webster County | 32568 |
| 18 | Lee County | 31825 |
| 19 | Marion County | 31419 |
| 20 | Sioux County | 30462 |
| 21 | Wapello County | 29779 |
| 22 | Marshall County | 29364 |
| 23 | Boone County | 25031 |
| 24 | Benton County | 24726 |
| 25 | Bremer County | 23608 |
| 26 | Plymouth County | 23148 |
| 27 | Mahaska County | 21033 |
| 28 | Buchanan County | 20356 |
| 29 | Washington County | 20315 |
| 30 | Winneshiek County | 19784 |
| 31 | Carroll County | 19467 |
| 32 | Jones County | 19257 |
| 33 | Fayette County | 18989 |
| 34 | Jackson County | 18562 |
| 35 | Henry County | 17626 |
| 36 | Cedar County | 17523 |
| 37 | Clayton County | 17039 |
| 38 | Poweshiek County | 16925 |
| 39 | Delaware County | 16898 |
| 40 | Dickinson County | 16340 |
| 41 | Hardin County | 15933 |
| 42 | Iowa County | 15573 |
| 43 | Clay County | 15489 |
| 44 | Madison County | 15084 |
| 45 | Floyd County | 14744 |
| 46 | Kossuth County | 14518 |
| 47 | Jefferson County | 14517 |
| 48 | Butler County | 14403 |
| 49 | Tama County | 14222 |
| 50 | Page County | 14155 |
| 51 | Mills County | 14072 |
| 52 | Hamilton County | 13674 |
| 53 | Harrison County | 13657 |
| 54 | O'Brien County | 12976 |
| 55 | Cass County | 12811 |
| 56 | Allamakee County | 12681 |
| 57 | Buena Vista County | 12580 |
| 58 | Appanoose County | 12042 |
| 59 | Grundy County | 12034 |
| 60 | Union County | 11727 |
| 61 | Chickasaw County | 11711 |
| 62 | Crawford County | 11538 |
| 63 | Lyon County | 11293 |
| 64 | Shelby County | 11228 |
| 65 | Wright County | 11160 |
| 66 | Cherokee County | 10797 |
| 67 | Mitchell County | 10356 |
| 68 | Hancock County | 10338 |
| 69 | Guthrie County | 10168 |
| 70 | Keokuk County | 9852 |
| 71 | Winnebago County | 9778 |
| 72 | Montgomery County | 9570 |
| 73 | Sac County | 9534 |
| 74 | Calhoun County | 9284 |
| 75 | Howard County | 9021 |
| 76 | Humboldt County | 9001 |
| 77 | Franklin County | 8878 |
| 78 | Louisa County | 8834 |
| 79 | Palo Alto County | 8611 |
| 80 | Emmet County | 8565 |
| 81 | Davis County | 8519 |
| 81 | Greene County | 8519 |
| 82 | Monona County | 8444 |
| 83 | Lucas County | 8349 |
| 84 | Clarke County | 7818 |
| 85 | Decatur County | 7596 |
| 86 | Monroe County | 7546 |
| 87 | Worth County | 7096 |
| 88 | Van Buren County | 7071 |
| 89 | Adair County | 6907 |
| 90 | Ida County | 6675 |
| 91 | Fremont County | 6598 |
| 92 | Pocahontas County | 6515 |
| 93 | Wayne County | 6145 |
| 94 | Taylor County | 5650 |
| 95 | Osceola County | 5550 |
| 96 | Audubon County | 5548 |
| 97 | Ringgold County | 4776 |
| 98 | Adams County | 3636 |