| Event | Time | Meet | Date |
|---|---|---|---|
| 100m Backstroke | 1:28.09 | MAC Jingle Bell | 2025-12-12 |
| 100m Freestyle | 1:15.40 | 2026 Central Region Div 2 SC Championships | 2026-02-20 |
| 100m IM | 1:33.27 | 2025 Downtown Sprint Meet | 2025-10-25 |
| 200m Backstroke | 3:11.80 | MAC Jingle Bell | 2025-12-12 |
| 200m Freestyle | 2:48.80 | MAC Jingle Bell | 2025-12-12 |
| 50m Backstroke | 40.29 | MAC Jingle Bell | 2025-12-12 |
| 50m Breaststroke | 49.54 | MAC Jingle Bell | 2025-12-12 |
| 50m Freestyle | 34.21 | OUA & Club Winter Invitational | 2026-01-17 |
Wagstaff, Katherine's top personal bests include 100m Backstroke (1:28.09), 100m Freestyle (1:15.40), 100m IM (1:33.27), 200m Backstroke (3:11.80), 200m Freestyle (2:48.80).
Wagstaff, Katherine swims for Toronto Swim Club.
Wagstaff, Katherine has competed in 5 meets.