| CPS |
| 21 |
| 1:46.56 |
| 2023-05-29 |
| 3 | Lo, Tsz Lam WTS · 18 | WTS | 18 | 1:46.97 | 2025-11-05 |
| 4 | Cheung, Kin Tat Kent CPS · 23 | CPS | 23 | 1:47.54 | 2016-03-14 |
| 5 | He, Shing Ip CPS · 19 | CPS | 19 | 1:48.02 | 2024-11-26 |
| 6 | Han, Pak Kiu HTA · 16 | HTA | 16 | 1:48.86 | 2025-11-05 |
| 7 | So, Kwun Wa WDA · 17 | WDA | 17 | 1:49.46 | 2025-02-10 |
| 8 | Lim Nicholas, Owen Zhaoguang LRC · 17 | LRC | 17 | 1:49.88 | 2019-03-08 |
| 9 | Ip, Ali TPS · 18 | TPS | 18 | 1:50.13 | 2026-02-10 |
| 10 | Ho, Siu Lun DLS · 19 | DLS | 19 | 1:50.18 | 2023-05-29 |
| 11 | Wang, Yi Shun CPS · 17 | CPS | 17 | 1:50.43 | 2026-02-10 |
| 12 | Wan, Chun Lim PSC · 19 | PSC | 19 | 1:50.52 | 2025-11-05 |
| 13 | Law, Lok Hei WTS · 19 | WTS | 19 | 1:50.57 | 2026-02-10 |
| 14 | Lai, King Wo WTS · 17 | WTS | 17 | 1:50.63 | 2025-02-10 |
| 15 | Liao, Xian Hao Jonathan HJC · 17 | HJC | 17 | 1:50.74 | 2017-03-16 |
| 16 | Chan, Chun Hei JHC · 21 | JHC | 21 | 1:50.76 | 2018-04-06 |
| 17 | Lau, Chor Tik WTS · 15 | WTS | 15 | 1:50.80 | 2025-02-10 |
| 18 | Cheng, Cheuk Chi George DLS · 17 | DLS | 17 | 1:51.01 | 2025-02-10 |
| 19 | Chi, Oscar DLS · 19 | DLS | 19 | 1:51.04 | 2018-12-03 |
| 20 | Yuen, Kai Ho HTA · 19 | HTA | 19 | 1:51.17 | 2022-07-18 |
| 21 | Wong, Chen Ho Jeremy HTA · 23 | HTA | 23 | 1:51.19 | 2018-12-03 |
| 22 | Williams, Miles Jing SCA · 18 | SCA | 18 | 1:51.26 | 2016-03-14 |
| 23 | Chan, Wah Royce HSW · 16 | HSW | 16 | 1:51.51 | 2024-11-26 |
| 24 | Wong, Lok Kan HTA · 19 | HTA | 19 | 1:51.64 | 2024-02-05 |
| 25 | Lau, Shiu Yue HTA · 25 | HTA | 25 | 1:51.68 | 2023-05-29 |