Top personal bests across all competitions
| # | Name | Team | Age | Time | Date |
|---|---|---|---|---|---|
| 1 | Ng, Cheuk Yin TPS · 19 | TPS | 19 | 51.87 | 2022-07-18 |
| 2 | Lau, Shiu Yue |
| HTA |
| 25 |
| 52.87 |
| 2023-05-29 |
| 3 | Kwan, Hayden PSC · 19 | PSC | 19 | 53.09 | 2022-07-18 |
| 4 | Yu, Dongqi HTA · 17 | HTA | 17 | 53.11 | 2025-02-10 |
| 5 | Koo, Ralph Yat Ho HTA · 25 | HTA | 25 | 53.28 | 2023-05-29 |
| 6 | To, Kenneth King Him LWS · 25 | LWS | 25 | 53.58 | 2018-12-03 |
| 7 | Li, Sing Hoi WTS · 19 | WTS | 19 | 54.02 | 2025-02-10 |
| 8 | Chan, Tsz Chiu KGC · 19 | KGC | 19 | 55.07 | 2022-11-22 |
| 9 | Mak, Ho Lun Raymond HTA · 22 | HTA | 22 | 55.10 | 2015-03-17 |
| 10 | Tsang, Jarod Chee Lok SCA · 17 | SCA | 17 | 55.14 | 2015-03-17 |
| 11 | Cheung, Kin Tat Kent CPS · 22 | CPS | 22 | 55.49 | 2015-03-17 |
| 12 | Hofstede, Adam Marcel DWA · 18 | DWA | 18 | 55.54 | 2025-02-10 |
| 13 | Cheung, Yau Ming *GW · 18 | *GW | 18 | 55.61 | 2016-03-14 |
| 14 | Chan, Sheung Kwan KGC · 22 | KGC | 22 | 55.68 | 2025-01-22 |
| 15 | Lu, Pat Fan SYS · 17 | SYS | 17 | 55.83 | 2023-05-29 |
| 16 | Yuk, Shing Chi PSC · 16 | PSC | 16 | 56.03 | 2019-03-08 |
| 17 | Mok, Kai Tik Marcus WTS · 17 | WTS | 17 | 56.06 | 2018-12-03 |
| 18 | Andiappan, Ethan Siddha Hsu LRC · 16 | LRC | 16 | 56.18 | 2026-02-10 |
| 19 | Ho, Siu Lun DLS · 14 | DLS | 14 | 56.32 | 2019-03-08 |
| 20 | Tsui, Wang Long Dominic HTA · 20 | HTA | 20 | 56.36 | 2025-02-10 |
| 21 | Ng, Kai Hong Henry HTA · 20 | HTA | 20 | 56.39 | 2016-03-14 |
| 22 | Cheng, Cheuk Kin Jake DLS · 17 | DLS | 17 | 56.43 | 2025-01-22 |
| 23 | Yu, Chi Lung PSC · 16 | PSC | 16 | 56.43 | 2025-02-10 |
| 24 | Fung, Chun Ho HTA · 19 | HTA | 19 | 56.44 | 2017-03-16 |
| 25 | Man, Pui Yin CPS · 14 | CPS | 14 | 56.80 | 2025-02-10 |