| Time | Date | Name | Meet |
|---|---|---|---|
| 54.33 | Feb. 8, 2019 | Jac Klimczak | IHSAA Girls State Championship |
| 54.44 | Feb. 9, 2018 | Jac Klimczak | IHSAA Girls State Championship |
| 55.47 | Feb. 1, 2018 | Jac Klimczak | IHSAA Sectional Championship - LaPorte (Girls) |
| 55.56 | Feb. 14, 2014 | Cara Kroeger | 14 Indiana State Championships - Girls |
| 56.16 | Feb. 6, 2014 | Cara Kroeger | 14 Indiana Sectional Championships - Girls (Chesterton) |
| 56.34 | Feb. 12, 2010 | Brittany Fozkos | 10 Indiana Girls State Championships |
| 59.71 | Feb. 13, 2009 | Maddie MILLER | 09 Indiana Girls State Swimming Championships |
