| Event | Time | Meet | Date |
|---|---|---|---|
| 100m Backstroke | 1:21.13 | Western Region Short Course Championships | 2026-02-12 |
| 100m Butterfly | 1:27.45 | 2026 Joanne Malar Invitational | 2026-01-16 |
| 100m Freestyle | 1:08.60 | Western Region Short Course Championships | 2026-02-12 |
| 200m Backstroke | 2:52.12 | Gus Ryder Memorial Cup 2025 | 2025-11-07 |
| 200m Breaststroke | 3:27.45 | 2025 HAC Steeltown Invitational | 2025-11-28 |
| 200m Freestyle | 2:28.33 | Western Region Short Course Championships | 2026-02-12 |
| 200m IM | 2:48.93 | Western Region Short Course Championships | 2026-02-12 |
| 400m Freestyle | 5:14.11 | Western Region Short Course Championships | 2026-02-12 |
| 400m IM | 6:01.51 | Western Region Short Course Championships | 2026-02-12 |
| 50m Backstroke | 38.04 | Western Region Short Course Championships | 2026-02-12 |
| 50m Breaststroke | 45.27 | 2026 Joanne Malar Invitational | 2026-01-16 |
| 50m Butterfly | 36.87 | 2026 Joanne Malar Invitational | 2026-01-16 |
| 50m Freestyle | 31.34 | Western Region Short Course Championships | 2026-02-12 |
| 800m Freestyle | 10:44.15 | Gus Ryder Memorial Cup 2025 | 2025-11-07 |
Mawdsley, Olivia's top personal bests include 100m Backstroke (1:21.13), 100m Butterfly (1:27.45), 100m Freestyle (1:08.60), 200m Backstroke (2:52.12), 200m Breaststroke (3:27.45).
Mawdsley, Olivia swims for Hamilton Aquatic Club.
Mawdsley, Olivia has competed in 9 meets.