| Event | Time | Meet | Date |
|---|---|---|---|
| 100m Backstroke | 1:16.17 | BAC SC Fall Invitational | 2025-11-07 |
| 100m Breaststroke | 1:22.68 | Scar Pan Am Winter Classic | 2026-01-16 |
| 100m Breaststroke | 1:18.53 | Walker Invitational | 2025-10-25 |
| 100m Butterfly | 1:18.35 | Scar Pan Am Winter Classic | 2026-01-16 |
| 100m Butterfly | 1:14.29 | Walker Invitational | 2025-10-25 |
| 100m Freestyle | 1:06.55 | ManSask Provincial Championships | 2025-07-10 |
| 100m IM | 1:14.40 | BAC Blue vs White Fall 2025 | 2025-10-18 |
| 200m Backstroke | 2:40.14 | Walker Invitational | 2025-10-25 |
| 200m Breaststroke | 2:57.04 | ManSask Provincial Championships | 2025-07-10 |
| 200m Breaststroke | 2:49.25 | LAC - Nothers Fall Invitational | 2025-11-21 |
| 200m Butterfly | 2:44.95 | Walker Invitational | 2025-10-25 |
| 200m Freestyle | 2:25.31 | Scar Pan Am Winter Classic | 2026-01-16 |
| 200m Freestyle | 2:22.52 | Walker Invitational | 2025-10-25 |
| 200m IM | 2:40.86 | ManSask Provincial Championships | 2025-07-10 |
| 200m IM | 2:32.62 | LAC - Nothers Fall Invitational | 2025-11-21 |
| 400m Freestyle | 5:10.97 | Scar Pan Am Winter Classic | 2026-01-16 |
| 400m Freestyle | 4:53.42 | Walker Invitational | 2025-10-25 |
| 400m IM | 5:37.36 | LAC - Nothers Fall Invitational | 2025-11-21 |
| 50m Backstroke | 37.29 | LC Winter Invitational | 2026-01-30 |
| 50m Backstroke | 38.51 | BAC Blue vs White Fall 2025 | 2025-10-18 |
| 50m Breaststroke | 35.34 | ManSask Provincial Championships | 2025-07-10 |
| 50m Breaststroke | 35.68 | BAC SC Fall Invitational | 2025-11-07 |
| 50m Butterfly | 33.50 | Western Region Long Course Championships | 2025-06-13 |
| 50m Butterfly | 32.23 | BAC SC Fall Invitational | 2025-11-07 |
| 50m Freestyle | 30.58 | Western Region Long Course Championships | 2025-06-13 |
| 50m Freestyle | 29.44 | BAC SC Fall Invitational | 2025-11-07 |
Willson, Isabel's top personal bests include 100m Backstroke (1:16.17), 100m Breaststroke (1:22.68), 100m Breaststroke (1:18.53), 100m Butterfly (1:18.35), 100m Butterfly (1:14.29).
Willson, Isabel swims for Brantford Aquatic Club.
Willson, Isabel has competed in 10 meets.