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| Time | Date | Name | Team | Meet |
|---|---|---|---|---|
| 51.62 | Nov. 4, 2023 | Jaya Veerapaneni | Lincoln Way East High School | IHSA Girls Sectional - Frankfort |
| 51.79 | Nov. 22, 2019 | Keara McGowan | Lincoln Way Central High School | IHSA Girls State Championships |
| 52.00 | Nov. 16, 2019 | Keara McGowan | Lincoln Way Central High School | IHSA Girls Sectional Championship - Lincoln-Way Central |
| 54.54 | Oct. 19, 2019 | Tina Winter | Lincoln Way East High School | Stevenson Girls Invite |
| 59.66 | Oct. 17, 2019 | Jenna Falsey | Carl Sandburg High School | Joliet Co-Op vs. Sandburg |
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