Ranking of Iowa Counties By Non-Hispanic Voting-age Population from Census 2020
Updated on August 29, 2023.
According to the data from the United States 2020 decennial Census, in April 2020, among all of Iowa counties, Polk County had the highest voting-age population who identified as Non-Hispanic (not hispanic or latino) (342.03K), followed by Linn County (171.26K), and Scott County (126.17K).
The chart below shows the top 10 counties, and the table below shows the ranking of all Iowa counties based on the voting-age population who identified as non-hispanic.
You can see similar ranking information for other states and also for the different racial groups in Iowa.
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Related Topics: Iowa Census 2020 Topic List.
Data Source: US Census Bureau, 2020 Census.
Ranking of Iowa Counties By Non-Hispanic Voting-age Population from Census 2020
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| Rank | County | Non-Hispanic Voting-age Population |
|---|---|---|
| 1 | Polk County | 342029 |
| 2 | Linn County | 171257 |
| 3 | Scott County | 126169 |
| 4 | Johnson County | 114843 |
| 5 | Black Hawk County | 98537 |
| 6 | Story County | 78086 |
| 7 | Dubuque County | 74985 |
| 8 | Dallas County | 68047 |
| 9 | Pottawattamie County | 67111 |
| 10 | Woodbury County | 66986 |
| 11 | Warren County | 38102 |
| 12 | Clinton County | 35013 |
| 13 | Cerro Gordo County | 32979 |
| 14 | Des Moines County | 29678 |
| 15 | Jasper County | 28771 |
| 16 | Webster County | 27930 |
| 17 | Muscatine County | 27849 |
| 18 | Lee County | 25647 |
| 19 | Marion County | 25179 |
| 20 | Marshall County | 24595 |
| 21 | Wapello County | 24361 |
| 22 | Sioux County | 23047 |
| 23 | Boone County | 20140 |
| 24 | Benton County | 19202 |
| 25 | Bremer County | 18816 |
| 26 | Plymouth County | 18321 |
| 27 | Mahaska County | 16626 |
| 28 | Washington County | 16131 |
| 29 | Jones County | 15902 |
| 30 | Winneshiek County | 15825 |
| 31 | Henry County | 15468 |
| 32 | Carroll County | 15394 |
| 33 | Jackson County | 15108 |
| 34 | Fayette County | 14995 |
| 35 | Buchanan County | 14950 |
| 36 | Poweshiek County | 14667 |
| 37 | Dickinson County | 14100 |
| 38 | Cedar County | 14000 |
| 39 | Delaware County | 13204 |
| 40 | Clayton County | 13166 |
| 41 | Hardin County | 12558 |
| 42 | Iowa County | 12481 |
| 43 | Jefferson County | 12313 |
| 44 | Clay County | 12302 |
| 45 | Madison County | 12123 |
| 46 | Tama County | 11928 |
| 47 | Page County | 11717 |
| 48 | Floyd County | 11648 |
| 49 | Buena Vista County | 11521 |
| 50 | Kossuth County | 11281 |
| 51 | Butler County | 11019 |
| 52 | Harrison County | 11016 |
| 53 | Hamilton County | 10691 |
| 54 | Mills County | 10682 |
| 55 | O'Brien County | 10314 |
| 56 | Allamakee County | 10085 |
| 57 | Cass County | 10057 |
| 58 | Appanoose County | 9462 |
| 59 | Grundy County | 9311 |
| 60 | Crawford County | 9258 |
| 61 | Union County | 9109 |
| 62 | Chickasaw County | 8881 |
| 63 | Shelby County | 8860 |
| 64 | Cherokee County | 8819 |
| 65 | Wright County | 8411 |
| 66 | Lyon County | 8246 |
| 67 | Winnebago County | 8101 |
| 68 | Guthrie County | 8070 |
| 69 | Hancock County | 8050 |
| 70 | Mitchell County | 7969 |
| 71 | Montgomery County | 7857 |
| 72 | Calhoun County | 7657 |
| 73 | Keokuk County | 7525 |
| 74 | Sac County | 7409 |
| 75 | Louisa County | 7231 |
| 76 | Humboldt County | 7036 |
| 77 | Howard County | 6945 |
| 78 | Emmet County | 6809 |
| 79 | Palo Alto County | 6805 |
| 80 | Franklin County | 6710 |
| 81 | Monona County | 6670 |
| 82 | Greene County | 6662 |
| 83 | Lucas County | 6476 |
| 84 | Clarke County | 6381 |
| 85 | Davis County | 6289 |
| 86 | Adair County | 5751 |
| 87 | Monroe County | 5735 |
| 88 | Decatur County | 5706 |
| 89 | Worth County | 5643 |
| 90 | Van Buren County | 5429 |
| 91 | Pocahontas County | 5265 |
| 92 | Ida County | 5242 |
| 93 | Fremont County | 4995 |
| 94 | Wayne County | 4764 |
| 95 | Osceola County | 4393 |
| 96 | Audubon County | 4390 |
| 97 | Taylor County | 4270 |
| 98 | Ringgold County | 3585 |
| 99 | Adams County | 2870 |