| Event | Time | Meet | Date |
|---|---|---|---|
| 100m Backstroke | 1:10.11 | Summer Provincial Championships LC | 2025-07-24 |
| 100m Backstroke | 1:08.77 | Pugsley's Plunge 2026 | 2026-01-16 |
| 100m Breaststroke | 1:24.47 | CP Team Champs 2025 | 2025-09-27 |
| 100m Freestyle | 1:05.07 | Summer Provincial Championships LC | 2025-07-24 |
| 100m Freestyle | 1:04.51 | Cascade Speed Meet 2025 Provincial Series #1 | 2025-11-08 |
| 100m IM | 1:13.69 | CP Team Champs 2025 | 2025-09-27 |
| 200m Backstroke | 2:30.44 | Edmonton Open 2026 | 2026-01-30 |
| 200m Backstroke | 2:28.35 | Cascade Speed Meet 2025 Provincial Series #1 | 2025-11-08 |
| 200m Breaststroke | 3:11.00 | Summer Provincial Championships LC | 2025-07-24 |
| 200m Freestyle | 2:24.36 | Summer Provincial Championships LC | 2025-07-24 |
| 200m Freestyle | 2:19.25 | Cascade Speed Meet 2025 Provincial Series #1 | 2025-11-08 |
| 200m IM | 2:40.68 | Summer Provincial Championships LC | 2025-07-24 |
| 200m IM | 2:36.04 | Pugsley's Plunge 2026 | 2026-01-16 |
| 400m Freestyle | 5:02.44 | Edmonton Open 2026 | 2026-01-30 |
| 400m Freestyle | 4:59.28 | OSC J.P. Fiset Invitational | 2025-12-11 |
| 50m Backstroke | 32.98 | Western Transmountain Festival I | 2026-02-14 |
| 50m Backstroke | 31.88 | Pugsley's Plunge 2026 | 2026-01-16 |
| 50m Breaststroke | 39.03 | Pugsley's Plunge 2026 | 2026-01-16 |
| 50m Butterfly | 34.27 | Edmonton Open 2026 | 2026-01-30 |
| 50m Butterfly | 32.31 | Pugsley's Plunge 2026 | 2026-01-16 |
| 50m Freestyle | 30.25 | Western Transmountain Festival I | 2026-02-14 |
| 50m Freestyle | 29.57 | Pugsley's Plunge 2026 | 2026-01-16 |
| 800m Freestyle | 10:15.78 | OSC J.P. Fiset Invitational | 2025-12-11 |
Thompson, Leah's top personal bests include 100m Backstroke (1:10.11), 100m Backstroke (1:08.77), 100m Breaststroke (1:24.47), 100m Freestyle (1:05.07), 100m Freestyle (1:04.51).
Thompson, Leah swims for Calgary Patriots Swim Club.
Thompson, Leah has competed in 9 meets.