| Northern | ||||||||||||||
| Rk | Team | Affiliate | W | L | Pct | Gbl | RF | RA | Manager | Stadium | Attendance | Top Batter | Top Pitcher | Playoffs |
| 1 | Waterloo Indians ** | CLE | 86 | 55 | .610 | -- | 799 | 641 | Cal Emery | Municipal Stadium | 72,606 | Von Hayes (1) | Dane Anthony (6) | League Champions |
| 2 | Wisconsin Rapids Twins | MIN | 77 | 64 | .546 | 9.0 | 727 | 620 | Rick Stelmaszek | Witter Field | 47,899 | Gary Gaetti (3) | Larry May (2) | Lost in Semi-Finals |
| 3 | Appleton Foxes | CHW | 76 | 63 | .547 | 9.0 | 691 | 580 | Gordy Lund | Goodland Field | 74,207 | Greg Walker (2) | Juan Agosto (11) | |
| 4 | Wausau Timbers | - | 57 | 82 | .410 | 28.0 | 584 | 686 | Marty Martinez | Athletic Park | 37,175 | Mike Frierson (20) | Mark Cahill (19) | |
| Southern | ||||||||||||||
| Rk | Team | Affiliate | W | L | Pct | Gbl | RF | RA | Manager | Stadium | Attendance | Top Batter | Top Pitcher | Playoffs |
| 1 | Quad Cities Cubs | CHC | 74 | 65 | .532 | -- | 657 | 546 | Jim Napier | John O'Donnell Stadium | 103,445 | Craig Kornfeld (7) | Richard Renwick (1) | Lost in Finals |
| 2 | Burlington Bees | MIL | 70 | 72 | .493 | 5.5 | 620 | 700 | Duane Espy | Community Field | 51,486 | Stan Levi (8) | Dave Grier (3) | Lost in Semi-Finals |
| 3 | Clinton Giants | SF | 62 | 79 | .440 | 13.0 | 548 | 678 | Wayne Cato | Riverview Stadium | 58,723 | Bob Cummings (11) | Scott Garrelts (9) | |
| 4 | Cedar Rapids Reds | CIN | 59 | 81 | .421 | 15.5 | 523 | 639 | Jim Lett | Veterans Field | 84,062 | Esky Viltz (21) | Paul Gibson (17) | |