Ranking of Iowa Counties By Non-Hispanic Population from Census 2020
Updated on February 22, 2026.
According to the data from the United States 2020 decennial Census, in April 2020, among all of Iowa counties, Polk County had the highest number of people who identified as Non-Hispanic (not hispanic or latino) (444.35K), followed by Linn County (221.39K), and Scott County (162.58K).
The chart below shows the top 10 counties, and the table below shows the ranking of all Iowa counties based on the number of people who identified as non-hispanic.
You can see similar ranking information for other states and also for the different racial groups and the different ethnicities 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 Population from Census 2020
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| Rank | County | Non-Hispanic Population |
|---|---|---|
| 1 | Polk County | 444346 |
| 2 | Linn County | 221388 |
| 3 | Scott County | 162577 |
| 4 | Johnson County | 142656 |
| 5 | Black Hawk County | 124696 |
| 6 | Dubuque County | 96289 |
| 7 | Story County | 93505 |
| 8 | Dallas County | 93163 |
| 9 | Woodbury County | 87195 |
| 10 | Pottawattamie County | 86007 |
| 11 | Warren County | 50745 |
| 12 | Clinton County | 44921 |
| 13 | Cerro Gordo County | 40884 |
| 14 | Des Moines County | 37665 |
| 15 | Jasper County | 36726 |
| 16 | Muscatine County | 35466 |
| 17 | Webster County | 34936 |
| 18 | Marion County | 32714 |
| 19 | Lee County | 32445 |
| 20 | Wapello County | 31105 |
| 21 | Marshall County | 30965 |
| 22 | Sioux County | 30958 |
| 23 | Boone County | 26006 |
| 24 | Benton County | 25113 |
| 25 | Bremer County | 24477 |
| 26 | Plymouth County | 24202 |
| 27 | Mahaska County | 21710 |
| 28 | Washington County | 20953 |
| 29 | Buchanan County | 20227 |
| 30 | Carroll County | 20166 |
| 31 | Jones County | 20149 |
| 32 | Winneshiek County | 19485 |
| 33 | Henry County | 19399 |
| 34 | Jackson County | 19248 |
| 35 | Fayette County | 18989 |
| 36 | Poweshiek County | 18133 |
| 37 | Cedar County | 18043 |
| 38 | Dickinson County | 17297 |
| 39 | Delaware County | 17244 |
| 40 | Clayton County | 16700 |
| 41 | Madison County | 16232 |
| 42 | Iowa County | 16167 |
| 43 | Hardin County | 16060 |
| 44 | Clay County | 15680 |
| 45 | Tama County | 15331 |
| 46 | Floyd County | 15077 |
| 47 | Jefferson County | 15053 |
| 48 | Buena Vista County | 14898 |
| 49 | Page County | 14747 |
| 50 | Harrison County | 14289 |
| 51 | Kossuth County | 14225 |
| 52 | Butler County | 14151 |
| 53 | Mills County | 14023 |
| 54 | Hamilton County | 13574 |
| 55 | O'Brien County | 13197 |
| 56 | Allamakee County | 12840 |
| 57 | Cass County | 12821 |
| 58 | Grundy County | 12184 |
| 59 | Appanoose County | 12086 |
| 60 | Union County | 11739 |
| 61 | Crawford County | 11613 |
| 62 | Chickasaw County | 11531 |
| 63 | Lyon County | 11527 |
| 64 | Shelby County | 11334 |
| 65 | Cherokee County | 11128 |
| 66 | Wright County | 10549 |
| 67 | Mitchell County | 10372 |
| 68 | Guthrie County | 10349 |
| 69 | Hancock County | 10181 |
| 70 | Winnebago County | 10085 |
| 71 | Montgomery County | 9959 |
| 72 | Keokuk County | 9818 |
| 73 | Calhoun County | 9691 |
| 74 | Sac County | 9460 |
| 75 | Howard County | 9211 |
| 76 | Humboldt County | 9167 |
| 77 | Louisa County | 9109 |
| 78 | Davis County | 8966 |
| 79 | Palo Alto County | 8722 |
| 80 | Greene County | 8515 |
| 81 | Monona County | 8515 |
| 82 | Emmet County | 8501 |
| 83 | Lucas County | 8436 |
| 84 | Franklin County | 8385 |
| 85 | Clarke County | 8214 |
| 86 | Monroe County | 7460 |
| 87 | Decatur County | 7434 |
| 88 | Adair County | 7310 |
| 89 | Worth County | 7232 |
| 90 | Van Buren County | 7089 |
| 91 | Ida County | 6750 |
| 92 | Pocahontas County | 6724 |
| 93 | Wayne County | 6436 |
| 94 | Fremont County | 6415 |
| 95 | Osceola County | 5589 |
| 96 | Audubon County | 5588 |
| 97 | Taylor County | 5497 |
| 98 | Ringgold County | 4592 |
| 99 | Adams County | 3662 |
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