Top personal bests across all competitions
| # | Name | Team | Age | Time | Date |
|---|---|---|---|---|---|
| 1 | Ng, Cheuk Yin TPS · 19 | TPS | 19 | 51.45 | 2022-07-18 |
| 2 | Li, Sing Hoi |
| WTS |
| 19 |
| 52.27 |
| 2025-02-10 |
| 3 | Koo, Ralph Yat Ho HTA · 28 | HTA | 28 | 52.89 | 2026-02-10 |
| 4 | Ho, Siu Lun DLS · 19 | DLS | 19 | 53.00 | 2023-05-29 |
| 5 | Ho, Tin Long WTS · 24 | WTS | 24 | 53.08 | 2021-09-14 |
| 6 | Yuk, Shing Chi PSC · 22 | PSC | 22 | 53.37 | 2026-02-10 |
| 7 | Lau, Kin Hei James HTA · 15 | HTA | 15 | 53.38 | 2024-02-05 |
| 8 | Chen, Haolin *CP · 17 | *CP | 17 | 53.47 | 2025-12-29 |
| 9 | Ng, Chun Nam Derick WTS · 22 | WTS | 22 | 53.51 | 2017-03-16 |
| 10 | Zhu, Xiuping PSC · 16 | PSC | 16 | 53.72 | 2025-12-29 |
| 11 | Lim Nicholas, Owen Zhaoguang LRC · 17 | LRC | 17 | 53.88 | 2019-03-08 |
| 12 | Kwong, Ka Ho LWS · 21 | LWS | 21 | 54.23 | 2018-12-03 |
| 13 | Yau, Pak Ho CPS · 17 | CPS | 17 | 54.33 | 2025-02-10 |
| 14 | Lee, Jia Jun Jody George SCA · 17 | SCA | 17 | 54.34 | 2024-02-05 |
| 15 | So, Chun Hei KTS · 16 | KTS | 16 | 54.38 | 2026-02-10 |
| 16 | Chung, Hei Chit HTA · 16 | HTA | 16 | 54.46 | 2025-02-10 |
| 17 | Tsui, Wang Long Dominic HTA · 19 | HTA | 19 | 54.60 | 2024-02-05 |
| 18 | Cheung, Kin Tat Kent CPS · 23 | CPS | 23 | 54.72 | 2016-03-14 |
| 19 | Chan, James Gavin HVA · 18 | HVA | 18 | 54.87 | 2019-03-08 |
| 20 | Yu, Dongqi HTA · 16 | HTA | 16 | 54.94 | 2024-02-06 |
| 21 | Lo, Cheuk Chun TPS · 19 | TPS | 19 | 54.96 | 2019-03-08 |
| 22 | Ng, Yan Kin HTA · 25 | HTA | 25 | 54.96 | 2023-05-29 |
| 23 | Lau, Chun Leung Johnny KHC · 23 | KHC | 23 | 55.01 | 2015-03-17 |
| 24 | Chan, Tsz Chiu KGC · 20 | KGC | 20 | 55.03 | 2023-05-29 |
| 25 | Lee, Chong Zheng Peter HVA · 17 | HVA | 17 | 55.07 | 2018-12-03 |