| Event | Time | Meet | Date |
|---|---|---|---|
| 100m Backstroke | 1:15.10 | Beast Cup 2026 | 2026-01-10 |
| 100m Breaststroke | 1:48.69 | 2025 Maddy Kort Invitational | 2025-06-20 |
| 100m Butterfly | 1:13.24 | KBM Heats & Finals | 2026-02-20 |
| 100m Freestyle | 1:04.45 | KBM Heats & Finals | 2026-02-20 |
| 100m IM | 1:22.45 | KBM Pentathlon | 2025-10-19 |
| 200m Backstroke | 2:47.94 | KBM Distance & Development | 2025-11-08 |
| 200m Freestyle | 2:31.02 | KBM Qualifier | 2025-05-24 |
| 200m IM | 2:52.58 | Beast Cup 2026 | 2026-01-10 |
| 400m Freestyle | 5:17.12 | KBM Heats & Finals | 2026-02-20 |
| 400m IM | 6:12.44 | BBST Fall Invitational 2025 | 2025-11-21 |
| 50m Backstroke | 33.46 | KBM Heats & Finals | 2026-02-20 |
| 50m Breaststroke | 50.14 | KBM Pentathlon | 2025-10-19 |
| 50m Butterfly | 31.10 | KBM Heats & Finals | 2026-02-20 |
| 50m Freestyle | 28.43 | KBM Heats & Finals | 2026-02-20 |
Crampton, Jonah's top personal bests include 100m Backstroke (1:15.10), 100m Breaststroke (1:48.69), 100m Butterfly (1:13.24), 100m Freestyle (1:04.45), 100m IM (1:22.45).
Crampton, Jonah swims for Ernestown Barracuda Swim Club.
Crampton, Jonah has competed in 8 meets.