2021 Swimming Backstroke 100M Results
| MEN | |||
| 55-59 | |||
| 1 | John Witham | Albuquerque, NM | 1:21.69 |
| 2 | Kenneth Hosch | Gilbert, AZ | 1:41.46 |
| 60-64 | |||
| 1 | Jonathan Riggs | Sylvania, OH | 1:20.65 |
| 2 | Darrell Jett | Bonita, CA | 1:30.26 |
| 65-69 | |||
| 1 | Bob Packer | Lafayette, CA | 1:25.21 |
| 2 | Mark Braaten | Bullard, TX | 1:34.70 |
| 3 | Daniel Underbrink | Kirkland, WA | 1:35.12 |
| 4 | James Byler | Elk Grove, CA | 1:42.17 |
| 70-74 | |||
| 1 | Terry Medjo | Grand Island, NE | 1:46.13 |
| 75-79 | |||
| 1 | Bob Welty | Dallas, TX | 1:37.47 |
| 2 | Kenneth R Hickey | Orlando, FL | 2:05.19 |
| 80-84 | |||
| 1 | Jim Gibbs | Carrollton, TX | 2:53.13 |
| WOMEN | |||
| 50-54 | |||
| 1 | Shirlene Gonzalez | Salem, OR | 1:55.63 |
| 55-59 | |||
| 1 | Brigid Bunch | Prescott, AZ | 1:16.75 |
| 2 | Stephanie Saucy | Las Vegas, NV | 1:18.40 |
| 3 | Julie Collins | Brigham City, UT | 1:54.41 |
| 60-64 | |||
| 1 | Susan Ingraham | San Antonio, TX | 1:24.65 |
| 2 | Deborah Pederson | San Antonio, TX | 2:00.25 |
| 3 | Sandra Zerner | Prescott, AZ | 2:32.75 |
| 65-69 | |||
| 1 | Eileen Shult | Mesquite, NM | 1:35.43 |
| 2 | Linda DeSanders | Dallas, TX | 1:41.84 |
| 3 | Jill Anderson | Prescott, AZ | 1:43.44 |
| 4 | Bonnie Coleman | Albuquerque, NM | 1:47.98 |
| 5 | Linda Bley | Sun City West, AZ | 1:48.58 |
| 6 | Elizabeth Scott | Sun City West, AZ | 1:51.26 |
| 7 | Gay Neibaur | Newdale, ID | 2:12.95 |
| 8 | Blair Brockman | Tulsa, OK | 2:25.19 |
| 9 | Lola Green | Palm Desert, CA | 2:41.45 |
| 70-74 | |||
| 1 | Karen Loring | Sun City West, AZ | 1:53.26 |
| 2 | Mary Mann | Sun City West, AZ | 2:02.59 |
| 3 | Susan Peters | Queens Village, NY | 2:09.30 |
| 4 | Bertha Bowen | Newdale, ID | 2:15.02 |
| 5 | Donna Howard | Sun City West, AZ | 2:17.55 |
| 75-79 | |||
| 1 | Beverly Montrella | Mission Viejo, CA | 1:44.46 |
| 2 | Ann Vitt | New Braunfels, TX | 1:54.65 |
| 3 | Polly Kegler | Woodbury, MN | 3:39.38 |
| 80-84 | |||
| 1 | Gaile Harden | Prescott, AZ | 3:14.90 |
| 2 | Betty Mae Locke | Lodi, CA | 3:37.80 |