| Event | Time | Meet | Date |
|---|---|---|---|
| 100m Backstroke | 1:36.73 | 2026 February Freeze Invitational | 2026-02-14 |
| 100m Breaststroke | 1:51.84 | Perth Candy Cane Meet | 2025-12-12 |
| 100m Freestyle | 1:22.91 | 2026 February Freeze Invitational | 2026-02-14 |
| 100m IM | 1:48.41 | KBM Pentathlon | 2025-10-19 |
| 200m Backstroke | 3:33.62 | Swim Ottawa Fall Invitational | 2025-11-01 |
| 200m Freestyle | 2:57.49 | 2026 February Freeze Invitational | 2026-02-14 |
| 200m IM | 3:35.51 | Perth Candy Cane Meet | 2025-12-12 |
| 400m Freestyle | 6:31.49 | Perth Candy Cane Meet | 2025-12-12 |
| 50m Backstroke | 44.68 | KBM Pentathlon | 2025-10-19 |
| 50m Breaststroke | 51.51 | KBM Pentathlon | 2025-10-19 |
| 50m Freestyle | 37.39 | 2026 February Freeze Invitational | 2026-02-14 |
Isserlin, Jonah's top personal bests include 100m Backstroke (1:36.73), 100m Breaststroke (1:51.84), 100m Freestyle (1:22.91), 100m IM (1:48.41), 200m Backstroke (3:33.62).
Isserlin, Jonah swims for Swim Ottawa.
Isserlin, Jonah has competed in 6 meets.