| Event | Time | Meet | Date |
|---|---|---|---|
| 100m Backstroke | 1:16.96 | East Coast Championships | 2025-07-10 |
| 100m Butterfly | 1:08.46 | Marianne Limpert Team Championship | 2026-02-05 |
| 100m Butterfly | 1:10.28 | NB Open Cup 2025 | 2025-12-05 |
| 100m Freestyle | 1:00.37 | Marianne Limpert Team Championship | 2026-02-05 |
| 100m Freestyle | 58.83 | NB Open Cup 2025 | 2025-12-05 |
| 200m Butterfly | 2:34.36 | Provincial Invitational | 2026-03-14 |
| 200m Freestyle | 2:10.74 | Marianne Limpert Team Championship | 2026-02-05 |
| 200m Freestyle | 2:09.07 | NB Open Cup 2025 | 2025-12-05 |
| 200m IM | 2:32.40 | NB Open Cup 2025 | 2025-12-05 |
| 400m Freestyle | 4:45.28 | Marianne Limpert Team Championship | 2026-02-05 |
| 50m Backstroke | 32.30 | Provincial Invitational | 2026-03-14 |
| 50m Breaststroke | 37.80 | Provincial Invitational | 2026-03-14 |
| 50m Butterfly | 30.51 | Marianne Limpert Team Championship | 2026-02-05 |
| 50m Butterfly | 29.75 | Provincial Invitational | 2026-03-14 |
| 50m Freestyle | 27.78 | Marianne Limpert Team Championship | 2026-02-05 |
| 50m Freestyle | 26.53 | Provincial Invitational | 2026-03-14 |
Allen, Liam's top personal bests include 100m Backstroke (1:16.96), 100m Butterfly (1:08.46), 100m Butterfly (1:10.28), 100m Freestyle (1:00.37), 100m Freestyle (58.83).
Allen, Liam swims for Fredericton Aquanauts Swimming Team.
Allen, Liam has competed in 4 meets.