| Name | Time | Date | Meet |
|---|---|---|---|
| Janelle Rudolph | 56.32 | March 5, 2020 | 2020 TYR Pro Swim Series - Des Moines |
| Margaret HOELZER | 55.09 | July 3, 2008 | 2008 U.S. Olympic Team Trials |
| Margaret HOELZER | 55.83 | June 29, 2008 | 2008 U.S. Olympic Team Trials |
| Kimberly Jasmer | 56.52 | Aug. 1, 2007 | 2007 ConocoPhillips USA Swimming Championships |
| Emily Kukors | 56.79 | June 10, 2004 | 2004 Janet Evans Invitational |
| Emilee Jennings | 58.69 | Dec. 4, 2003 | 2003 U.S. Open Swimming Championship |
