As of 2024 Individual Medley Records
| * NATIONAL Record | ||||
| 100 METER INDIVIDUAL MEDLEY | **WORLD Record | |||
| Men | Name | City/State | Mark | Year |
| 50-54 | John Landreth | Crested Butte, CO | 1:01.26 | 2022 |
| 55-59 | Alistair Cockburn | Salt Lake City, UT | 1:06.09 | 2008 |
| 60-64 | Steve Heck | Katy, TX | 1:08.31 | 2009 |
| 65-69 | Steve Heck | Prairieville, LA | 1:14.17 | 2018 |
| 70-74 | Steve Heck | Prairieville, LA | 1:15.53 | 2019 |
| 75-79 | Mike Freshley | Montrose, CA | 1:17.55 | 2016 |
| 80-84 | Bob Best | Grand Terrace, CA | 1:33.29 | 2012 |
| 85-89 | Clarke Mitchell | Overton, NV | 1:41.31 | 2018 |
| 90-94 | Frank Tanner | Oceanside, CA | 2:02.10 | 2021 |
| 95-99 | Bill Reeder | Sparks, NV | 5:45.94 | 2005 |
| Women | Name | City/State | Mark | Year |
| 50-54 | Susan Ingraham | San Antonio, TX | 1:19.85 | 2013 |
| 55-59 | Brigid Bunch | Prescott, AZ | 1:19.43 | 2018 |
| 60-64 | Karlyn Pipes | Kailua Kona, HI | 1:16.36 | 2024 |
| 65-69 | Penny Noyes | Bowling Green, KY | 1:17.57 | 2022 |
| 70-74 | Daniela Barnea | Palo Alto, CA | 1:37.43 | 2018 |
| 75-79 | Daniela Barnea | Palo Alto, CA | 1:39.35 | 2019 |
| 80-84 | Daniela Barnea | Palo Alto, CA | 1:49.39 | 2024 |
| 85-89 | Nan Bohl | Olathe, KS | 2:22.34 | 2015 |
| 90-94 | Nan Bohl | Olathe, KS | 2:58.00 | 2019 |
| 95-99 | Charlotte Sanddal | Helena, MT | 3:48.24 | 2017 |
| 100+ | Charlotte Sanddal | Helena, MT | 5:01.09 | 2022* |
| 200 METER INDIVIDUAL MEDLEY | ||||
| Men | Name | City/State | Mark | Year |
| 50-54 | John Landreth | Crested Butte, CO | 2:18.39 | 2022 |
| 55-59 | Steve Heck | Baton Rouge, LA | 2:32.42 | 2004 |
| 60-64 | Steve Heck | Katy, TX | 2:31.72 | 2010 |
| 65-69 | Mike Freshley | San Diego, CA | 2:43.49 | 2006 |
| 70-74 | Steve Heck | Prairieville, LA | 2:50.42 | 2019 |
| 75-79 | Steve Heck | Prairieville, LA | 2:55.18 | 2024 |
| 80-84 | Bob Best | Grand Terrace, CA | 3:37.38 | 2012 |
| 85-89 | Frank Piemme | Lompoc, CA | 4:19.27 | 2012 |
| 90-94 | Jurgen Schmidt | Huntington Beach, CA | 5:46.04 | 2013 |
| Women | Name | City/State | Mark | Year |
| 50-54 | Esther Iseppi | Switzerland | 2:58.13 | 2012 |
| 55-59 | Brigid Bunch | Prescott, AZ | 2:54.23 | 2018 |
| 60-64 | Brigid Bunch | Prescott, AZ | 2:50.29 | 2023 |
| 65-69 | Penny Noyes | Bowling Green, KY | 2:55.29 | 2022 |
| 70-74 | Daniela Barnea | Palo Alto, CA | 3:34.68 | 2014 |
| 75-79 | Daniela Barnea | Palo Alto, CA | 3:37.88 | 2019 |
| 80-84 | Daniela Barnea | Palo Alto, CA | 3:48.77 | 2024 * |
| 85-89 | Jean Durston | Concord, CA | 5:12.01 | 1999 |
| 90-94 | Charlotte Sanddal | Helena, MT | 7:17.44 | 2012 |
| 95-99 | Charlotte Sanddal | Helena, MT | 9:32.59 | 2018 |
| 400 METER INDIVIDUAL MEDLEY | ||||
| Men | Name | City/State | Mark | Year |
| 50-54 | Kurt Dickson | Glendale, AZ | 5:14.79 | 2018 |
| 55-59 | Kurt Dickson | Manhattan, KS | 5:18.73 | 2022 |
| 60-64 | Steve Heck | Katy, TX | 5:33.42 | 2009 |
| 65-69 | Steve Heck | Prairieville, LA | 6:07.52 | 2018 |
| 70-74 | Steve Heck | Prairieville, LA | 6:13.62 | 2019 |
| 75-79 | Douglas Springer | Tucson, AZ | 6:31.73 | 2021 |
| 80-84 | Frank Tanner | Oceanside, CA | 8:03.48 | 2011 |
| 85-89 | Frank Tanner | Oceanside, CA | 9:01.55 | 2016 |
| 90-94 | Frank Tanner | Oceanside, CA | 10:07.33 | 2021 |
| Women | Name | City/State | Mark | Year |
| 50-54 | Esther Iseppi | Switzerland | 6:10.12 | 2012 |
| 55-59 | Susan Ingraham | San Antonio, TX | 6:20.69 | 2015 |
| 60-64 | Kathleen Steffe | Castle Pines, CO | 6:14.93 | 2022 |
| 65-69 | Bonnie Pronk | Campbell River, BC, Canada | 6:49.48 | 2007 |
| 70-74 | Daniela Barnea | Palo Alto, CA | 7:45.76 | 2014 |
| 75-79 | Daniela Barnea | Palo Alto, CA | 8:27.27 | 2023 |
| 80-84 | Daniela Barnea | Palo Alto, CA | 9:14.48 | 2024 |
| 85-89 | Jean Durston | Concord, CA | 10:55.73 | 1999 |