2018 Swimming Individual Medley 400M Results
| Men 50-54 | |||
| 1 | Kurt Dickson | Glendale, AZ | 5:14.79 |
| 2 | Dennis Tesch | Salt Lake City, UT | 5:33.46 |
| 3 | Eric Johnson | Lindon, UT | 7:33.69 |
| Men 55-59 | |||
| 1 | Robert Olson | Helper, UT | 8:30.74 |
| Men 60-64 | |||
| 1 | Robert Voll | Gresham, OR | 6:18.53 |
| 2 | Robert Mitchell | Lake Forest, CA | 6:21.30 |
| 3 | Daniel Underbrink | Kirkland, WA | 7:00.50 |
| 4 | Gary Abbate | Bridgeport, WV | 7:44.51 |
| 5 | John Ramos | San Bernardino, CA | 7:52.28 |
| 6 | PH Leong | Sebastopol, CA | 10:54.64 |
| Men 65-69 | |||
| 1 | Steve Heck | Prairieville, LA | 6:07.52 |
| Men 70-74 | |||
| 1 | Vadym Kutsenko | Kharkiv, Ukraine | 7:12.44 |
| 2 | Dennis Meyring | American Fork, UT | 7:18.41 |
| Men 75-79 | |||
| 1 | Mike Freshley | Montrose, CA | 7:05.59 |
| 2 | Deacon John Crooks | Kansas City, MO | 14:00.58 |
| Women 55-59 | |||
| 1 | Brigid Bunch | Prescott, AZ | 6:22.56 |
| 2 | Patty Deters | Grand Junction, CO | 8:17.71 |
| Women 60-64 | |||
| 1 | Diana LaMar | Las Vegas, NV | 7:03.41 |
| 2 | Helen Morley | Calgary, AB, Canada | 7:25.26 |
| 3 | Cheryl Gettelfinger | Carmel, IN | 7:39.07 |
| 4 | Blair Brockman | Tulsa, OK | 9:47.81 |
| Women 65-69 | |||
| 1 | Carolyn Lyman | Salt Lake City, UT | 7:47.10 |
| 2 | Peggy Stringer | Helena, MT | 8:42.77 |
| 3 | Kathleen Tittle | The Villages, FL | 10:38.10 |
| Women 75-79 | |||
| 1 | Lynne H. Lund | St. George, UT | 9:12.59 |
| Women 80-84 | |||
| 1 | Katherine Kronwall | Bayfield, CO | 21:08.59 |