| Event | Time | Meet | Date |
|---|---|---|---|
| 100m Backstroke | 1:11.92 | Toronto Grand Prix | 2026-01-24 |
| 100m Butterfly | 1:02.42 | 2025 Age Group International LC | 2025-06-05 |
| 100m Butterfly | 1:00.57 | 2026 U SPORTS Swimming Championships | 2026-03-12 |
| 100m Freestyle | 1:02.35 | 2025 Age Group International LC | 2025-06-05 |
| 200m Butterfly | 2:17.42 | 2026 U SPORTS Swimming Championships | 2026-03-12 |
| 50m Backstroke | 32.00 | WLU Battle of Waterloo | 2025-10-31 |
| 50m Butterfly | 28.00 | 2025 Age Group International LC | 2025-06-05 |
| 50m Butterfly | 27.33 | 2026 OUA Swimming Championships | 2026-02-19 |
| 50m Freestyle | 28.11 | 2025 Age Group International LC | 2025-06-05 |
| 50m Freestyle | 27.72 | Dean Boles Divisionals | 2025-11-22 |
Hannah Gallagher's top personal bests include 100m Backstroke (1:11.92), 100m Butterfly (1:02.42), 100m Butterfly (1:00.57), 100m Freestyle (1:02.35), 200m Butterfly (2:17.42).
Hannah Gallagher swims for University of Waterloo.
Hannah Gallagher has competed in 10 meets.