| Name | Time | Date | Meet |
|---|---|---|---|
| Janelle Rudolph | 48.27 | Dec. 21, 2019 | Pacific Northwest Senior Championships |
| Janelle Rudolph | 48.76 | Dec. 14, 2019 | Speedo Winter Junior Championship West |
| Chelsea Bailey | 49.33 | Dec. 20, 2015 | PN Washington State Senior SC Championships |
| Ariana KUKORS | 49.36 | Dec. 6, 2008 | ConocoPhillips Short Course Championships |
