| Event | Time | Meet | Date |
|---|---|---|---|
| 100m Backstroke | 1:06.11 | BAC Team Showdown 2025 | 2025-12-12 |
| 100m Breaststroke | 1:15.82 | BAC Team Showdown 2025 | 2025-12-12 |
| 100m Freestyle | 57.20 | LAC - 13 & Over Time Trial | 2026-01-17 |
| 200m Breaststroke | 2:52.97 | LAC - Nothers Fall Invitational | 2025-11-21 |
| 200m IM | 2:29.57 | LAC - 13 & Over Time Trial | 2026-01-17 |
| 400m Freestyle | 4:51.18 | LAC - Nothers Fall Invitational | 2025-11-21 |
| 50m Breaststroke | 34.51 | LAC - 13 & Over Time Trial | 2026-01-17 |
| 50m Freestyle | 26.16 | BAC Team Showdown 2025 | 2025-12-12 |
Jansen, Jacob's top personal bests include 100m Backstroke (1:06.11), 100m Breaststroke (1:15.82), 100m Freestyle (57.20), 200m Breaststroke (2:52.97), 200m IM (2:29.57).
Jansen, Jacob swims for London Aquatic Club.
Jansen, Jacob has competed in 3 meets.