| Time | Date | Name | Meet |
|---|---|---|---|
| 49.01 | March 26, 2015 | Keaton Blovad | Speedo Champions Series - Austin |
| 50.25 | March 13, 2014 | Keaton Blovad | Speedo Champions Series - Federal Way |
| 50.50 | March 14, 2013 | Grace Carlson | Speedo Champions Series - Federal Way |
| 50.65 | March 10, 2011 | Michelle Cefal | Speedo Sectionals - Federal Way, WA |
| 51.10 | March 6, 2003 | Anne Liggett | American Short Course Championships |
