| SurveyUSA Regional Breakdowns for state of Iowa | ||||||||||
| Northeast IA | Southeast IA | Southwest IA | Northwest IA | |||||||
| 1 | Allamakee | 1 | Adams | 1 | Adair | 1 | Boone | |||
| 2 | Benton | 2 | Appanoose | 2 | Audubon | 2 | Buena Vista | |||
| 3 | Black Hawk | 3 | Clarke | 3 | Cass | 3 | Calhoun | |||
| 4 | Bremer | 4 | Davis | 4 | Dallas | 4 | Carroll | |||
| 5 | Buchanan | 5 | Decatur | 5 | Fremont | 5 | Cherokee | |||
| 6 | Butler | 6 | Des Moines | 6 | Guthrie | 6 | Clay | |||
| 7 | Cedar | 7 | Henry | 7 | Harrison | 7 | Crawford | |||
| 8 | Cerro Gordo | 8 | Jasper | 8 | Madison | 8 | Dickinson | |||
| 9 | Chickasaw | 9 | Jefferson | 9 | Mills | 9 | Emmet | |||
| 10 | Clayton | 10 | Keokuk | 10 | Montgomery | 10 | Franklin | |||
| 11 | Clinton | 11 | Lee | 11 | Polk | 11 | Greene | |||
| 12 | Delaware | 12 | Lucas | 12 | Pottawattamie | 12 | Hamilton | |||
| 13 | Dubuque | 13 | Mahaska | 13 | Shelby | 13 | Hancock | |||
| 14 | Fayette | 14 | Marion | 14 | Hardin | |||||
| 15 | Floyd | 15 | Marshall | 15 | Humboldt | |||||
| 16 | Grundy | 16 | Monroe | 16 | Ida | |||||
| 17 | Howard | 17 | Page | 17 | Kossuth | |||||
| 18 | Iowa | 18 | Poweshiek | 18 | Lyon | |||||
| 19 | Jackson | 19 | Ringgold | 19 | Monona | |||||
| 20 | Johnson | 20 | Story | 20 | O'Brien | |||||
| 21 | Jones | 21 | Taylor | 21 | Osceola | |||||
| 22 | Linn | 22 | Union | 22 | Palo Alto | |||||
| 23 | Louisa | 23 | Van Buren | 23 | Plymouth | |||||
| 24 | Mitchell | 24 | Wapello | 24 | Pocahontas | |||||
| 25 | Muscatine | 25 | Warren | 25 | Sac | |||||
| 26 | Scott | 26 | Washington | 26 | Sioux | |||||
| 27 | Tama | 27 | Wayne | 27 | Webster | |||||
| 28 | Winneshiek | 28 | Winnebago | |||||||
| 29 | Worth | 29 | Woodbury | |||||||
| 30 | Wright | |||||||||