| Lane | Athlete | Yr. | Team | Seed | Note | 
|---|---|---|---|---|---|
| 1 | CRABB, Stephanie | 7 | Walter R. Sundling | 45.00 | |
| 2 | DUNDERDALE, Julia | 7 | Sandburg (Rolling Meadows) | 37.53 | |
| 3 | SIMONIAN, Jillian | 7 | Plum Grove | 32.90 | |
| 4 | ROYER, Lilly | 7 | Winston | 29.20 | |
| 5 | KAWCZYNSKA, Zofia | 7 | Plum Grove | 32.40 | |
| 6 | GONZALES, Yaisslyn | 7 | Winston | 34.60 | |
| 7 | PIRITA, Melanie | 7 | Walter R. Sundling | 45.00 | |
| 8 | MORRIS, Sarah | 7 | Sandburg (Rolling Meadows) | NT | 
| Lane | Athlete | Yr. | Team | Seed | Note | 
|---|---|---|---|---|---|
| 1 | HIPCHEN, Hayden | 7 | Sandburg (Rolling Meadows) | NT | |
| 2 | PANOS, Lia | 7 | Walter R. Sundling | 46.00 | |
| 3 | GONZALES, Sam | 7 | Winston | 39.80 | |
| 4 | DELANDRES, Maria | 7 | Plum Grove | 36.09 | |
| 5 | MEDELLIN, Alexis | 7 | Winston | 37.70 | |
| 6 | THOMPSON, Susannah | 7 | Plum Grove | 42.90 | |
| 7 | LANTMAN, Anna | 7 | Walter R. Sundling | 46.00 |