| # | Athlete | Performance | Date | Meet |
|---|---|---|---|---|
| 1 | 01:00.28 | 03/29/2025 | 2025 Cloverleaf Early Bird Relays @ Cloverleaf High School | |
| 2 | 01:01.34 | 05/01/2015 | 2015 Orange Relays @ Orange High School | |
| 3 | 01:02.21 | 04/29/2016 | 2016 Orange Relays @ Orange High School | |
| 4 | 01:03.57 | 03/23/2024 | 2024 Cloverleaf Early Bird Relays @ Cloverleaf High School | |
| 5 | 01:04.65 | 04/28/2017 | 2017 Orange Relays @ Orange High School | |
| 6 | 01:04.80 | 04/26/2019 | 2019 Orange Relays @ Orange High School | |
| 7 | 01:05.88 | 03/26/2022 | 2022 Cloverleaf Early Bird Relays @ Cloverleaf High School |