| Lane | Athlete | Yr. | Team | Seed | Note |
|---|---|---|---|---|---|
| 1 | OLD, Charlotte | SO | Hinsdale South High School | NT | Unverified: |
| 2 | HAFFNER, Kate | SR | Hinsdale South High School | NT | Unverified: |
| 3 | JARA, Karina | SR | Morton High School (Berwyn) | 1:21.18 | Verified |
| 4 | PARSHETTY, Sai | JR | Conant High School | 1:21.30 | Unverified: |
| 5 | MORELLI, Julia | SR | Trinity High School | NT | Unverified: |
| Lane | Athlete | Yr. | Team | Seed | Note |
|---|---|---|---|---|---|
| 1 | SAMMOUR, Noor | SR | Morton High School (Berwyn) | 1:18.22 | Unverified: |
| 2 | MORRIS, Molly | JR | Willowbrook High School | 1:10.13 | Unverified: |
| 3 | WEDER, Lily | SR | Willowbrook High School | 1:07.17 | Verified |
| 4 | GUZMAN, Jessica | JR | Morton High School (Berwyn) | NT | |
| 5 | BATES, Micah | JR | Conant High School | 1:17.80 | Unverified: |
| 6 | BARRINGTON, Amelia | JR | Willowbrook High School | 1:20.00 | Verified |