Top personal bests across all competitions
| # | Name | Team | Age | Time | Date |
|---|---|---|---|---|---|
| 1 | Ho, Ian Yentou SCA · 28 | SCA | 28 | 53.36 | 2025-11-03 |
| 2 | Ng, Cheuk Yin |
| TPS |
| 19 |
| 53.38 |
| 2022-06-27 |
| 3 | Lim Nicholas, Owen Zhaoguang LRC · 20 | LRC | 20 | 53.40 | 2021-06-28 |
| 4 | Cheah, Geoffrey Robin SCA · 24 | SCA | 24 | 53.86S qQT | 2015-04-14 |
| 5 | Koo, Ralph Yat Ho HTA · 26 | HTA | 26 | 53.99 | 2024-10-02 |
| 6 | Zhu, Xiuping PSC · 16 | PSC | 16 | 54.01 | 2025-08-18 |
| 7 | Li, Sing Hoi WTS · 20 | WTS | 20 | 54.20 | 2025-04-14 |
| 8 | Ho, Siu Lun DLS · 19 | DLS | 19 | 54.51 | 2023-08-21 |
| 9 | Lau, Kin Hei James HTA · 16 | HTA | 16 | 54.54 | 2025-04-14 |
| 10 | Ho, Tin Long WTS · 24 | WTS | 24 | 54.72 | 2021-06-02 |
| 11 | Ng, Chun Nam Derick WTS · 22 | WTS | 22 | 54.78 | 2016-11-08 |
| 12 | Lo, Cheuk Chun TPS · 20 | TPS | 20 | 55.55 | 2019-09-21 |
| 13 | Jakl, David Christopher HTA · 21 | HTA | 21 | 55.66 | 2015-11-11 |
| 14 | Chung, Hei Chit HTA · 15 | HTA | 15 | 55.84 | 2024-05-17 |
| 15 | Yuk, Shing Chi PSC · 21 | PSC | 21 | 55.85 | 2024-07-15 |
| 16 | Abou Ghannam, Karl SCA · 18 | SCA | 18 | 56.06 | 2025-08-18 |
| 17 | Ho, Chung Lun PSC · 21 | PSC | 21 | 56.33 | 2024-10-02 |
| 18 | Lee, Jia Jun Jody George SCA · 18 | SCA | 18 | 56.46 | 2024-07-15 |
| 19 | Kwong, Ka Ho LWS · 18 | LWS | 18 | 56.48 | 2015-04-14 |
| 20 | Ng, Anson HTA · 16 | HTA | 16 | 56.53 | 2024-07-15 |
| 21 | Lau, Chun Leung Johnny KHC · 23 | KHC | 23 | 56.61 | 2015-04-14 |
| 22 | Chan, Wai Ching Adrian HTA · 15 | HTA | 15 | 56.74 | 2025-11-03 |
| 23 | Wang, Yi Shun CPS · 16 | CPS | 16 | 56.74 | 2024-10-02 |
| 24 | Hui, Yik Kiu CPS · 17 | CPS | 17 | 56.82 | 2025-04-14 |
| 25 | Lee, Chong Zheng Peter SCA · 20 | SCA | 20 | 56.83 | 2021-06-28 |