| Lane | Athlete | Team | Seed |
|---|---|---|---|
| 2 | HEIDEN, Payton | Plano | NT |
| 3 | PAVILIONIS, Inga | Aurora (Illinois Math and Sc | NT |
| 4 | MINER, Sarah | West Chicago (Wheaton Academ | 1:11.73 |
| 5 | TSOKOVA, Yanita | Lisle (Sr) | 1:19.18 |
| 6 | MOSHER, Emalie | Sandwich | NT |
| 7 | ROCHEL, Cristina | Glen Ellyn (Glenbard South) | NT |
| Lane | Athlete | Team | Seed |
|---|---|---|---|
| 1 | RILEY, Paige | Dixon (H.S.) | 1:11.07 |
| 2 | VOCK, Faith | Lisle (Sr) | 1:09.52 |
| 3 | PANAGAKIS, Maria | Aurora (Rosary) | 1:07.61 |
| 4 | MARTINEZ, Rachel | Plano | 1:05.45 |
| 5 | VON SCHNASE, Kylie | Sycamore (H.S.) | 1:05.58 |
| 6 | HILLS, Taylor | Dixon (H.S.) | 1:07.70 |
| 7 | FERRARO, Christina | Aurora (Rosary) | 1:10.89 |
| 8 | ROEHRIG, Cecilia | Genoa (G.-Kingston) | 1:11.13 |
| Lane | Athlete | Team | Seed |
|---|---|---|---|
| 1 | MEYERS, Teagan | Rochelle | 1:04.34 |
| 2 | BRENNAN, Tia | Burlington (Central) | 1:03.78 |
| 3 | HENKEL, Alivia | Rochelle | 1:01.74 |
| 4 | DERVIS, Maggie | Aurora (Central Catholic) | 58.02 |
| 5 | OROZCO, Isabella | Aurora (Central Catholic) | 1:00.98 |
| 6 | ANDERSEN, Kenzie | Burlington (Central) | 1:02.67 |
| 7 | FLATTER, Aliska | Sycamore (H.S.) | 1:04.21 |
| 8 | GREGERSEN, Cora | West Chicago (Wheaton Academ | 1:04.72 |