| Time | Date | Name | Meet |
|---|---|---|---|
| 50.78 | Dec. 8, 2023 | Archer Jankoviak | Speedo Winter Junior Championship East - Time Trials |
| 51.44 | March 11, 2023 | Ike Ruszkowski | Indiana Senior State Championships |
| 52.37 | March 19, 2022 | Ike Ruszkowski | Indiana Senior State Championships |
| 52.40 | March 13, 2021 | Michael Burns | Indiana Swimming Senior Championships |
| 52.63 | March 10, 2018 | Joe Radde | Indiana Senior State Championships |
| 54.05 | March 12, 2016 | Will Serf | Indiana Senior State Championships |
| 55.13 | March 13, 2015 | Dakota Danks | Indiana Senior Short Course Championships |
| 56.57 | March 8, 2015 | Jake Toppen | NW Indiana Divisional Cha |
| 58.58 | March 9, 2013 | Lance Fozo | Indiana Senior Championships (SCY) |
