| SUBSTATE SITE | |||||
| CEDAR RAPIDS, JEFFERSON | CEDAR RAPIDS, JEFFERSON | 2 | CEDAR RAPIDS, WASHINGTON | 0 | |
| CLINTON | DAVENPORT, NORTH | 8 | CLINTON | 7 | |
| DAVENPORT, CENTRAL | DAVENPORT, CENTRAL | 15 | MUSCATINE | 10 | |
| FORT DODGE | FORT DODGE | 9 | MASON CITY | 8 | (8) |
| JOHNSTON | AMES | 7 | DES MOINES, ROOSEVELT | 4 | |
| NEWTON | URBANDALE | 4 | NEWTON | 0 | |
| SIOUX CITY, NORTH | SIOUX CITY, EAST | 9 | SIOUX CITY, WEST | 8 | |
| VALLEY, WEST DES MOINES | VALLEY, WEST DES MOINES | 11 | WAUKEE | 5 |