| SUBSTATE SITE | |||||
| BENTON, VAN HORNE | INDEPENDENCE | 13 | MARION | 3 | (6 inn) |
| CARROLL | GLENWOOD | 9 | A-D-M, ADEL | 1 | |
| IOWA FALLS-ALDEN | ALGONA | 4 | BOONE | 3 | (10 inn) |
| MAQUOKETA | CENTRAL CLINTON, DEWITT | 9 | WAHLERT, DUBUQUE | 7 | |
| NEW HAMPTON | CHARLES CITY | 3 | DECORAH | 2 | |
| NORWALK | CARLISLE | 1 | DALLAS CENTER-GRIMES | 0 | |
| OTTUMWA | KNOXVILLE | 7 | MOUNT PLEASANT | 2 | |
| STORM LAKE | STORM LAKE | 9 | SERGEANT BLUFF-LUTON | 6 |