| Event | Time | Year | Record-holder(s) | Team
|
|---|---|---|---|---|
| 200 yd. Medley Relay | 1:34.57 | 1989 | Tim DeBoom, Chris Cruise, Jamahl Roland, Rich Mitvalsky | Cedar Rapids Washington |
| 200 Freestyle | 1:36.36 | 1985 | Craig Oppel | West Des Moines Valley |
| 200 I.M. | 1:51.35 | 1997 | Jason Lathrum | Indianola |
| 50 Freestyle | :20.32 | 1993 | Chris Eckerman | West Des Moines Dowling |
| 1m Diving (11 dives)* | 594.85 | 1982 | Jeff Symons | Ames |
| 100 Butterfly | :49.13 | 1985 | Craig Oppel | West Des Moines Valley |
| 100 Freestyle | :44.17 | 1993 | Chris Eckerman | West Des Moines Dowling |
| 500 Freestyle | 4:30.62 | 1996 | Jason Lathrum | Indianola |
| 200 Freestyle Relay | 1:25.29 | 1997 | Allyn Secor, Colin Hanrahan, Mack Jilek, Jon Strother | Cedar Rapids Washington |
| 100 Backstroke | :51.11 | 1993 | Jory Blauer | Decorah |
| 100 Breastroke | :56.38 | 1998 | Ben Litton | Cedar Falls |
| 400 Freestyle Relay | 3:10.17 | 1997 | Ian Renner-Arjes, Josh Morehouse, Omar Godoi, John Lonergan | Bettendorf |
* The Iowa High School Athletic Association discontinued diving as an
official swimming event after the 1993-1994 season.