| Central Division | Cedar Rapids Division | Eastern Division | Western Division |
| Butler | Benton | Allamakee | Buena Vista |
| Calhoun | Cedar | Black Hawk | Cherokee |
| Carroll | Grundy | Bremer | Clay |
| Cerro Gordo | Hardin | Buchanan | Crawford |
| Emmet | Iowa | Chichasaw | Dickinson |
| Franklin | Jones | Clayton | Ida |
| Hamilton | Linn | Delaware | Lyon |
| Hancock | Tama | Dubuque | Monana |
| Humboldt | Fayette | O'Brien | |
| Kossuth | Floyd | Osceola | |
| Palo Alto | Howard | Plymouth | |
| Pochaontas | Jackson | Sac | |
| Webster | Mitchell | Sioux | |
| Winnebago | Winneshiek | Woodbury | |
| Worth | |||
| Wright |