| Time | Date | Name | Meet |
|---|---|---|---|
| 4:35.68 | Feb. 17, 2022 | Mason McCauley | CCIW Championships |
| 4:36.85 | Feb. 20, 2020 | Mason McCauley | College Conference of Illinois & Wisconsin Championships |
| 4:37.09 | Feb. 19, 2009 | Chris Betzle | CCIW Championships |
| 4:40.76 | Feb. 14, 2008 | Chris Betzle | CCIW Championships |
| 4:41.81 | Feb. 8, 2007 | Larry Graves | CCIW Championships |
| 4:44.10 | Feb. 13, 2003 | Jason Ozbolt | CCIW Swimming Championships |
| 4:44.87 | Feb. 14, 2002 | Jason Ozbolt | CCIW Championships |
