| Lane | Athlete | Yr. | Team | Seed | Note |
|---|---|---|---|---|---|
| 3 | GARCIA, Andres | 8 | Grayslake | NT | |
| 4 | BILLADEAU, Kellan | 8 | Percy Julian | NT | |
| 5 | THOMPSON, Henry | 8 | Percy Julian | NT |
| Lane | Athlete | Yr. | Team | Seed | Note |
|---|---|---|---|---|---|
| 2 | HARRIS, Ari | 8 | Francis W. Parker | 1:50.00 | |
| 3 | MARTELLI, Tyler | 6 | Lake Zurich South | 1:24.00 | |
| 4 | MCGUIRE, Max | 8 | Antioch Upper | 1:16.00 | |
| 5 | FOTOS, George | 6 | Lake Zurich South | 1:22.00 | |
| 6 | MESIRES, Xander | 8 | Francis W. Parker | 1:45.00 | |
| 7 | RAHIM, Aiden | 8 | Grayslake | NT | |
| 8 | CHARFOOS, Jack | 6 | Francis W. Parker | NT |
| Lane | Athlete | Yr. | Team | Seed | Note |
|---|---|---|---|---|---|
| 1 | SCHNEIDER, Kyle | 8 | Lake Zurich North | 1:15.00 | |
| 2 | REYES, Casey | 8 | Park | 1:08.00 | |
| 3 | DEL HIERRO, Will | 7 | Latin School of Chicago | 1:07.00 | |
| 4 | RAVENSCRAFT, Ben | 8 | Hawthorn North | 1:04.00 | |
| 5 | ARANDA, E | 8 | Hawthorn South | 1:05.00 | |
| 6 | LACERBA, Anthony | 8 | Antioch Upper | 1:07.00 | |
| 7 | DUSTIN, Kimball | 8 | Lake Zurich North | 1:09.00 | |
| 8 | CARTER, Garrison | 8 | Matthews | 1:15.00 |
| Lane | Athlete | Yr. | Team | Seed | Note |
|---|---|---|---|---|---|
| 1 | GITZINGER, Christian | 8 | Hawthorn North | 1:02.37 | |
| 2 | SCIMECA, Jonathan | 8 | Big Hollow | 1:01.33 | |
| 3 | BERRY, Jared | 8 | Barrington-Prairie Campus | 58.12 | |
| 4 | SARKAR, Gavin | 8 | Barrington-Prairie Campus | 57.46 | |
| 5 | GIBSON, Sam | 8 | Latin School of Chicago | 58.00 | |
| 6 | LING, Toby | 7 | Hawthorn South | 1:00.00 | |
| 7 | SCHLAF, Michael | 8 | Big Hollow | 1:02.19 | |
| 8 | CUMMINGS, Evan | 8 | Park | 1:03.00 |