| Event | Time | Meet | Date |
|---|---|---|---|
| 100m Backstroke | 1:12.43 | 2025 Summer Divisionals Island & Coastal Vancouver | 2025-06-27 |
| 100m Butterfly | 1:04.63 | Toronto Grand Prix | 2026-01-24 |
| 100m Butterfly | 1:02.01 | 2026 U SPORTS Swimming Championships | 2026-03-12 |
| 200m Butterfly | 2:20.78 | 2026 OUA Swimming Championships | 2026-02-19 |
| 200m Freestyle | 2:10.34 | 2025 Summer Divisionals Island & Coastal Vancouver | 2025-06-27 |
| 400m Freestyle | 4:39.26 | 2025 Summer Divisionals Island & Coastal Vancouver | 2025-06-27 |
| 400m IM | 5:17.40 | 2025 Summer Divisionals Island & Coastal Vancouver | 2025-06-27 |
| 50m Breaststroke | 39.04 | Hollyburn July 5 Time Trial | 2025-07-05 |
| 50m Butterfly | 29.45 | Toronto Grand Prix | 2026-01-24 |
| 50m Butterfly | 28.22 | 2026 U SPORTS Swimming Championships | 2026-03-12 |
| 50m Freestyle | 27.93 | Toronto Grand Prix | 2026-01-24 |
| 50m Freestyle | 27.11 | 2026 OUA Swimming Championships | 2026-02-19 |
Brooke Johannson's top personal bests include 100m Backstroke (1:12.43), 100m Butterfly (1:04.63), 100m Butterfly (1:02.01), 200m Butterfly (2:20.78), 200m Freestyle (2:10.34).
Brooke Johannson swims for Western University.
Brooke Johannson has competed in 9 meets.