| Name | Time | Date | Meet |
|---|---|---|---|
| Maya Dobry | 1:04.38 | Nov. 4, 2023 | IHSA Girls Sectional - Lockport (Twp.) |
| Maya Dobry | 1:05.81 | Nov. 5, 2022 | IHSA Girls Sectional - Lockport (Twp.) |
| Devin Apps | 1:05.93 | Nov. 21, 2014 | 2014-15 Illinois Girls State Championships |
| Jamie Pappanastos | 1:06.56 | Nov. 30, 2011 | 2011-12 Illinois Girls Championships |
| Jamie Pappanastos | 1:08.27 | Nov. 19, 2010 | 2010 Illinois Girls State Championships |
