| Name | Time | Date | Meet |
|---|---|---|---|
| Madeline Bruce | 59.51 | Feb. 20, 2016 | 2016 Midwest Conference Championships |
| Madeline Bruce | 59.84 | Feb. 15, 2014 | 2014 Midwest Conference Championships |
| Madeline Bruce | 1:01.67 | Dec. 6, 2013 | Grinnell College Invitational |
| Victoria Kassabaum | 1:08.11 | Feb. 4, 2012 | Beloit vs. Knox |
| Anna Claypool | 1:12.94 | Feb. 19, 2011 | Midwest Conference Championships |
| Kelley O'Connor | 1:15.84 | Nov. 13, 2010 | Monmouth Invitiational |
| Lu Yaeger | 1:16.97 | Jan. 15, 2010 | Grinnell Invitational |
