| Lane | Athlete | Yr. | Team | Seed | Note | 
|---|---|---|---|---|---|
| 3 | Benitez, Jayra | FR | Addison Trail | NT | |
| 4 | Hansen, Celia | FR | Franklin Park-Northlake (Leyden) | NT | |
| 5 | Parker, Linda | FR | Trinity (River Forest) | NT | |
| 6 | Larocco, Arianna | FR | Trinity (River Forest) | NT | 
| Lane | Athlete | Yr. | Team | Seed | Note | 
|---|---|---|---|---|---|
| 1 | Perez, Nancy | FR | Addison Trail | NT | |
| 2 | Lemus, Fernanda | FR | Chicago (Solorio Academy) | 1:26.31 | |
| 3 | Polk, Tia | SO | Harvey (Thornton) | 1:15.75 | |
| 4 | Schmidt, Lacey | Glenbard South | 1:13.47 | ||
| 5 | Alexander, Gianna | Glenbard South | 1:14.75 | ||
| 6 | Larios, Alondra | FR | Chicago (Solorio Academy) | 1:24.30 | |
| 7 | Bruschuk, Elizabeth | FR | Willowbrook | NT | |
| 8 | Feldman, Izzy | FR | Hersey | NT | 
| Lane | Athlete | Yr. | Team | Seed | Note | 
|---|---|---|---|---|---|
| 1 | Matthews, Ashante | SO | Harvey (Thornton) | 1:09.88 | |
| 2 | Campbell, Kayla | FR | Schaumburg | 1:09.00 | |
| 3 | Weder, Lily | FR | Willowbrook | 1:06.30 | |
| 4 | O'Brien, Katie | SO | Hersey | 1:03.74 | |
| 5 | Delaney, Besty | SO | Loyola Academy | 1:06.00 | |
| 6 | Murilo, Soribel | SO | Franklin Park-Northlake (Leyden) | 1:08.00 | |
| 7 | Bevan, Abby | SO | Loyola Academy | 1:09.00 | |
| 8 | Traversa, Anna | FR | Schaumburg | 1:11.00 |