| Name | Time | Date | Meet |
|---|---|---|---|
| Riley Gaines | 49.58 | March 16, 2016 | NCSA Spring Junior National Championship |
| Riley Gaines | 50.44 | Dec. 12, 2015 | Speedo Winter Junior Championships - East |
| Riley Gaines | 50.92 | March 18, 2015 | NCSA Spring Junior National Championship |
| Sarah Sargent | 51.34 | March 22, 2006 | 2006 NCSA Junior National Championships |
| Sarah Sargent | 52.28 | March 22, 2005 | 2005 NCSA Junior National Championships |
