| Time | Date | Name | Meet |
|---|---|---|---|
| 53.54 | July 27, 2023 | Archer Jankoviak | USA Swimming Futures Championship - West Fargo |
| 53.59 | July 14, 2023 | Archer Jankoviak | Indiana Senior LCM Championships |
| 53.87 | July 16, 2021 | Mason Young | Indiana Senior Long Course Championship |
| 54.12 | July 19, 2019 | Forrest Baumgartner | Indiana Senior State Championships |
| 54.13 | July 21, 2006 | Chris Pfaff | Indiana Senior State Championships |
