2021 Swimming Individual Medley 400M Results
| MEN | |||
| 55-59 | |||
| 1 | Steven Heaney | Sylvania, OH | 6:56.97 |
| 60-64 | |||
| 1 | Steve Hammond | Phoenix, AZ | 7:34.14 |
| 2 | PH Leong | Hurricane, UT | 11:28.52 |
| 65-69 | |||
| 1 | Bernard Sauve | Sun City, AZ | 6:59.80 |
| 2 | Gary Abbate | Bridgeport, WV | 7:04.98 |
| 3 | Daniel Underbrink | Kirkland, WA | 7:57.02 |
| 70-74 | |||
| 1 | Gary Fine | Minneapolis, MN | 7:57.02 |
| 2 | Alex Grether | Albuquerque, NM | 9:17.03 |
| 75-79 | |||
| 1 | Douglas Springer | Tucson, AZ | 6:31.73 |
| 2 | Vadym Kutsenko | Kharkiv, Ukraine | 7:54.10 |
| 90-94 | |||
| 1 | Frank Tanner | Oceanside, CA | 10:07.33 |
| WOMEN | |||
| 55-59 | |||
| 1 | Stephanie Saucy | Las Vegas, NV | 6:23.98 |
| 2 | Samantha Martoni | Green Valley, AZ | 7:33.00 |
| 3 | Susan Martin | Anchorage, AK | 7:51.67 |
| 60-64 | |||
| 1 | Julie Eakle | San Antonio, TX | 6:50.43 |
| 2 | Melissa Russell | Edgewood, TX | 7:48.55 |
| 3 | Jacqueline Thorpe | Milford, MI | 8:17.71 |
| 65-69 | |||
| 1 | Joannie Eastridge | Green Valley, AZ | 8:02.50 |
| 2 | Teresa McGiverin | Kansas City, MO | 8:16.47 |
| 3 | Marianne Erickson | Prescott Valley, AZ | 8:45.10 |
| 80-84 | |||
| 1 | Lynne H. Lund | St. George, UT | 10:34.09 |