| SUBSTATE SITE | |||||
| ANKENY | ANKENY | 8 | URBANDALE | 3 | |
| BURLINGTON | BURLINGTON | 13 | DAVENPORT, CENTRAL | 0 | (5) |
| CEDAR RAPIDS, KENNEDY | CEDAR RAPIDS, KENNEDY | 6 | CEDAR RAPIDS, JEFFERSON | 2 | |
| DUBUQUE, HEMPSTEAD | DUBUQUE, HEMPSTEAD | 7 | DAVENPORT, NORTH | 3 | |
| JOHNSTON | JOHNSTON | 9 | AMES | 4 | |
| MARSHALLTOWN | MARSHALLTOWN | 5 | FORT DODGE | 1 | |
| SIOUX CITY, NORTH | SIOUX CITY, NORTH | 12 | SIOUX CITY, EAST | 1 | (6) |
| SOUTHEAST POLK | SOUTHEAST POLK | 7 | VALLEY, WEST DES MOINES | 5 |