| Time | Date | Name | Meet |
|---|---|---|---|
| 51.40 | Dec. 8, 2024 | Elle Dameworth | IN Cup |
| 51.49 | Nov. 22, 2024 | Elle Dameworth | MHSAA Division 1 State Championship |
| 51.97 | Nov. 8, 2024 | Elle Dameworth | LVC Girls Championships |
| 52.01 | Oct. 30, 2024 | Elle Dameworth | Milford | Lakeland vs. Lapeer |
| 52.15 | Oct. 17, 2024 | Elle Dameworth | South Lyon East vs. Milford | Lakeland |
| 52.35 | Oct. 4, 2024 | Elle Dameworth | Oakland County Championships |
| 52.71 | Nov. 17, 2023 | Elle Dameworth | MHSAA Division 1 State Championship |
| 53.10 | Nov. 18, 2022 | Elle Dameworth | MHSAA Division 1 State Championships |
| 53.19 | Nov. 4, 2022 | Elle Dameworth | Lakes Valley Conference Championships |
| 53.38 | Nov. 17, 2020 | Ella Glaspie | Milford Time Trials |
| 53.39 | Nov. 16, 2018 | Rylie Kennedy | MHSAA Girls Division 2 State Championship |
| 53.59 | Nov. 2, 2018 | Rylie Kennedy | Lakes Valley Girls Conference Meet |
| 54.06 | Oct. 6, 2018 | Rylie Kennedy | Oakland County Girls Swimming & Diving Championships |
| 55.56 | Sept. 28, 2018 | Rylie Kennedy | Wayne Invitational (Girls) |
| 55.70 | Nov. 3, 2017 | Rylie Kennedy | Lakes Valley Conference Meet |
| 56.12 | Nov. 20, 2009 | Katie Pohlman | MHSAA D1 Girls (LP) Championship |
