| Substate Site | |||||
| ANKENY | ANKENY | 13 | DES MOINES, NORTH | 0 | (5) |
| BETTENDORF | DAVENPORT, NORTH | 6 | BETTENDORF | 5 | 0 |
| BOONE | AMES | 14 | BOONE | 9 | 0 |
| BURLINGTON | BURLINGTON | 10 | DAVENPORT, WEST | 0 | (5) |
| CEDAR RAPIDS, JEFFERSON | CEDAR RAPIDS, JEFFERSON | 14 | DUBUQUE, SENIOR | 4 | 0 |
| CEDAR RAPIDS, KENNEDY | CEDAR RAPIDS, KENNEDY | 10 | PRAIRIE, CEDAR RAPIDS | 4 | 0 |
| CEDAR RAPIDS, KENNEDY | CEDAR RAPIDS, WASHINGTON | 3 | LINN-MAR, MARION | 2 | 0 |
| CLINTON | CLINTON | 11 | NORTH SCOTT, ELDRIDGE | 3 | 0 |
| DES MOINES, HOOVER | URBANDALE | 6 | DES MOINES, EAST | 5 | 0 |
| DES MOINES, HOOVER | NEWTON | 7 | DES MOINES, HOOVER | 4 | 0 |
| DOWLING CATHOLIC, WDM | DES MOINES, ROOSEVELT | 6 | DOWLING CATHOLIC, WDM | 0 | 0 |
| DUBUQUE, HEMPSTEAD | DUBUQUE, HEMPSTEAD | 3 | PLEASANT VALLEY | 2 | 0 |
| FORT DODGE | FORT DODGE | 4 | CEDAR FALLS | 1 | 0 |
| IOWA CITY, WEST | MUSCATINE | 10 | IOWA CITY, CITY | 6 | 0 |
| IOWA CITY, WEST | DAVENPORT, CENTRAL | 7 | IOWA CITY, WEST | 2 | 0 |
| JOHNSTON | JOHNSTON | 12 | DES MOINES, LINCOLN | 2 | (6) |
| LEWIS CENTRAL | SIOUX CITY, WEST | 5 | LEWIS CENTRAL | 4 | (10) |
| MARSHALLTOWN | MARSHALLTOWN | 11 | WATERLOO, EAST | 0 | (6) |
| SIOUX CITY, EAST | SIOUX CITY, EAST | 13 | COUNCIL BLUFFS, T JEFFERSON | 3 | (5) |
| SIOUX CITY, NORTH | SIOUX CITY, NORTH | 10 | COUNCIL BLUFFS, ABE LINCOLN | 0 | (5) |
| SOUTHEAST POLK, RUNNELLS | SOUTHEAST POLK, RUNNELLS | 17 | OSKALOOSA | 3 | (5) |
| SOUTHEAST POLK, RUNNELLS | WAUKEE | 10 | OTTUMWA | 7 | (8) |
| VALLEY, WEST DES MOINES | VALLEY, WEST DES MOINES | 13 | INDIANOLA | 3 | (5) |
| WATERLOO, WEST | MASON CITY | 5 | WATERLOO, WEST | 2 | 0 |