| Q | IHSA Boys 2A Qualifying | 1:30.81 | 2A Qualifying | 
| Lane | Team | Squad | Seed | Note | 
|---|---|---|---|---|
| 3 | Mundelein (Carmel) | A | 1:39.84 | |
| 4 | Poplar Grove (North Boone | A | 1:39.44 | |
| 5 | Arlington Heights (St. Vi | A | 1:39.78 | |
| 6 | Richmond (R.-Burton) | A | 1:40.03 | 
| Lane | Team | Squad | Seed | Note | 
|---|---|---|---|---|
| 1 | Harvard | A | 1:37.13 | |
| 2 | Woodstock (H.S.) | A | 1:36.03 | |
| 3 | Woodstock (North) | A | 1:33.78 | |
| 4 | Vernon Hills | A | 1:33.62 | |
| 5 | North Chicago | A | 1:33.64 | |
| 6 | Johnsburg | A | 1:35.75 | |
| 7 | Rockford (Boylan Catholic | A | 1:36.25 | |
| 8 | Marengo | A | 1:37.53 |