| Lane | Athlete | Yr. | Team | Seed | 
|---|---|---|---|---|
| 1 | THOMAS, Stephanie | JR | Hoffman Estates (H.S.) | 1:03.72 | 
| 2 | COLON, Karen | JR | Elk Grove Village (E.G.) | 1:01.91 | 
| 3 | STOFFEL, Megan | SR | Palatine (H.S.) | 55.09 | 
| 4 | WATSON, Taylor | FR | Buffalo Grove | 54.44 | 
| 5 | DAFNIS, Eleni | JR | Wheeling | 55.02 | 
| 6 | CHACKO, Shreya | JR | Rolling Meadows | 56.61 | 
| 7 | MBOME, Alexis | SR | Hoffman Estates (H.S.) | 1:02.87 | 
| Lane | Athlete | Yr. | Team | Seed | 
|---|---|---|---|---|
| 1 | STRACHOWSKI, Sarah | SO | Palatine (Fremd) | 53.54 | 
| 2 | KATULA, Katherine | FR | Barrington | 52.95 | 
| 3 | KOTECKI, Alex | SO | Schaumburg | 52.24 | 
| 4 | SEPKO, Claudia | SO | Arlington Heights (Hersey) | 51.99 | 
| 5 | WIECEK, Julia | SR | Schaumburg | 52.12 | 
| 6 | WINTERGERST, Chloe | SR | Buffalo Grove | 52.74 | 
| 7 | HAUGHTON, Aaleyiah | SO | Arlington Heights (Hersey) | 53.34 | 
| 8 | SHAFAR, Megan | SR | Elk Grove Village (E.G.) | 54.21 | 
| Lane | Athlete | Yr. | Team | Seed | 
|---|---|---|---|---|
| 1 | ROSSI, Charlotte | SO | Mt. Prospect (Prospect) | 50.54 | 
| 2 | RICHTER, Stella | SO | Hoffman Estates (Conant) | 49.35 | 
| 3 | ESQUIVEL, Maria | SR | Palatine (Fremd) | 49.01 | 
| 4 | DUNN, Breanne | SR | Barrington | 46.80 | 
| 5 | LETZIG, Emma | JR | Mt. Prospect (Prospect) | 48.61 | 
| 6 | OLORO, Oreoluwa | SR | Rolling Meadows | 49.11 | 
| 7 | KAZEEM, Aisha | FR | Palatine (H.S.) | 49.64 | 
| 8 | BRADLEY, Vashayla | SR | Hoffman Estates (Conant) | 50.62 |