| Adair | Cherokee | Franklin | Johnson |
Montgomery | Tama |
| Adams | Chickasaw | Fremont |
Jones | Muscatine | Taylor |
| Allamakee | Clarke | Greene |
Keokuk | O'Brien | Union |
| Appanoose | Clay | Grundy |
Kossuth | Osceola | Van
Buren |
| Audubon | Clayton | Guthrie | Lee | Page | Wapello |
| Benton | Clinton | Hamilton | Linn | Palo Alto | Warren |
| Black Hawk | Crawford | Hancock | Louisa | Plymouth |
Washington |
| Boone | Dallas | Hardin | Lucas |
Pocahontas | Wayne |
| Bremer | Davis | Harrison | Lyon | Polk | Webster |
| Buchanan | Decatur | Henry | Madison | Pottawattamie |
Winnebago |
| Buena Vista | Delaware | Howard | Mahaska |
Poweshiek | Winneshiek |
| Butler | Des Moines | Humboldt |
Marion | Ringgold | Woodbury |
| Calhoun | Dickinson | Ida |
Marshall | Sac | Worth |
| Carroll | Dubuque | Iowa |
Mills | Scott | Wright |
| Cass | Emmet | Jackson |
Mitchell | Shelby | |
| Cedar | Fayette | Jasper |
Morona | Sioux | |
| Cerro Gordo | Floyd |
Jefferson | Monroe | Story |
|