Ranking of Iowa Counties By Population with Czech Ancestry in 2021
Updated on April 16, 2025.
Based on the US Census ACS-5Yrs estimates, in 2021, there were 49.62K people in Iowa with Czech ancestry. Among all Iowa counties, Linn County had the highest population with Czech ancestry (11.36K), followed by Johnson County (4.91K), and Polk County (4.74K).
The chart and table below shows the top 10 counties with high number of people with Czech 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 Population with Czech Ancestry in 2021
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| Rank | County | Population |
|---|---|---|
| 1 | Linn County | 11357 |
| 2 | Johnson County | 4911 |
| 3 | Polk County | 4742 |
| 4 | Black Hawk County | 1851 |
| 5 | Scott County | 1666 |
| 6 | Tama County | 1505 |
| 7 | Winneshiek County | 1464 |
| 8 | Pottawattamie County | 1398 |
| 9 | Benton County | 1309 |
| 10 | Howard County | 1030 |
| 11 | Woodbury County | 965 |
| 12 | Story County | 900 |
| 13 | Dubuque County | 829 |
| 14 | Cerro Gordo County | 821 |
| 15 | Marshall County | 769 |
| 16 | Dallas County | 746 |
| 17 | Jones County | 573 |
| 18 | Muscatine County | 549 |
| 19 | Cedar County | 510 |
| 20 | Warren County | 497 |
| 21 | Iowa County | 491 |
| 22 | Webster County | 480 |
| 23 | Clinton County | 353 |
| 24 | Mills County | 351 |
| 25 | Poweshiek County | 345 |
| 26 | Fayette County | 328 |
| 27 | Chickasaw County | 325 |
| 28 | Delaware County | 319 |
| 29 | Sioux County | 311 |
| 30 | Bremer County | 299 |
| 31 | Allamakee County | 280 |
| 32 | Des Moines County | 257 |
| 33 | Marion County | 251 |
| 34 | Buchanan County | 247 |
| 35 | Buena Vista County | 244 |
| 36 | Jasper County | 241 |
| 37 | Floyd County | 235 |
| 38 | Cherokee County | 234 |
| 39 | Washington County | 219 |
| 40 | Plymouth County | 217 |
| 41 | Hancock County | 198 |
| 42 | Clayton County | 191 |
| 43 | Boone County | 189 |
| 44 | Wright County | 186 |
| 45 | Cass County | 180 |
| 46 | Mitchell County | 170 |
| 47 | Madison County | 169 |
| 48 | Carroll County | 165 |
| 49 | Union County | 163 |
| 50 | Grundy County | 162 |
| 51 | Hardin County | 160 |
| 52 | Pocahontas County | 148 |
| 53 | Henry County | 142 |
| 54 | Ringgold County | 137 |
| 55 | Emmet County | 135 |
| 55 | Harrison County | 135 |
| 56 | Butler County | 130 |
| 57 | Keokuk County | 128 |
| 58 | Mahaska County | 118 |
| 59 | Dickinson County | 117 |
| 60 | Page County | 104 |
| 61 | Jackson County | 103 |
| 61 | Monona County | 103 |
| 62 | Crawford County | 97 |
| 63 | Shelby County | 96 |
| 64 | Winnebago County | 94 |
| 65 | Monroe County | 91 |
| 66 | Clarke County | 85 |
| 67 | Appanoose County | 77 |
| 68 | Worth County | 75 |
| 69 | Wapello County | 69 |
| 70 | Guthrie County | 68 |
| 71 | Adams County | 66 |
| 72 | Calhoun County | 62 |
| 73 | Kossuth County | 61 |
| 74 | Humboldt County | 60 |
| 75 | Lucas County | 59 |
| 76 | O'Brien County | 57 |
| 77 | Clay County | 55 |
| 77 | Louisa County | 55 |
| 78 | Jefferson County | 53 |
| 78 | Lee County | 53 |
| 79 | Hamilton County | 52 |
| 80 | Fremont County | 42 |
| 81 | Lyon County | 40 |
| 82 | Franklin County | 39 |
| 83 | Van Buren County | 36 |
| 84 | Sac County | 34 |
| 85 | Palo Alto County | 30 |
| 86 | Taylor County | 29 |
| 87 | Ida County | 25 |
| 88 | Audubon County | 23 |
| 89 | Adair County | 20 |
| 90 | Greene County | 18 |
| 91 | Montgomery County | 15 |
| 91 | Osceola County | 15 |
| 92 | Decatur County | 10 |
| 93 | Wayne County | 5 |