| Event | Time | Meet | Date |
|---|---|---|---|
| 100m Backstroke | 1:33.89 | 2025 Alex Baumann Invitational | 2025-11-21 |
| 100m Breaststroke | 1:47.73 | 2026 Central Region Div 2 SC Championships | 2026-02-20 |
| 100m Butterfly | 1:33.49 | 2026 Central Region Div 2 SC Championships | 2026-02-20 |
| 100m Freestyle | 1:22.53 | MAC Jingle Bell | 2025-12-12 |
| 100m IM | 1:30.01 | 2025 Murray Drudge Invitational | 2025-12-05 |
| 200m Backstroke | 3:14.81 | MAC Jingle Bell | 2025-12-12 |
| 200m Breaststroke | 3:46.36 | MAC Jingle Bell | 2025-12-12 |
| 200m Butterfly | 3:33.31 | 2025 Alex Baumann Invitational | 2025-11-21 |
| 200m Freestyle | 2:57.03 | RHAC Fall Classic 2025 | 2025-10-24 |
| 200m IM | 3:16.17 | RHAC Fall Classic 2025 | 2025-10-24 |
| 400m Freestyle | 6:07.29 | 2025 Murray Drudge Invitational | 2025-12-05 |
| 50m Backstroke | 43.65 | MAC Jingle Bell | 2025-12-12 |
| 50m Breaststroke | 50.50 | RHAC Fall Classic 2025 | 2025-10-24 |
| 50m Butterfly | 40.49 | 2025 Murray Drudge Invitational | 2025-12-05 |
| 50m Freestyle | 37.91 | MAC Jingle Bell | 2025-12-12 |
Jang, Jacob's top personal bests include 100m Backstroke (1:33.89), 100m Breaststroke (1:47.73), 100m Butterfly (1:33.49), 100m Freestyle (1:22.53), 100m IM (1:30.01).
Jang, Jacob swims for Markham Aquatic Club.
Jang, Jacob has competed in 12 meets.