| Event | Time | Meet | Date |
|---|---|---|---|
| 100m Breaststroke | 1:12.15 | uOttawa_vs._Carleton_Vs._Waterloo Tri Meet 2025 | 2025-10-18 |
| 200m Backstroke | 2:22.27 | 2025 Eastern Ontario LC Regional Championships | 2025-06-05 |
| 200m Butterfly | 2:19.25 | East Coast Championships | 2025-07-10 |
| 200m Butterfly | 2:11.50 | Coupe_Universitaire_3_11082025 | 2025-11-08 |
| 200m Freestyle | 2:01.28 | 2025 Eastern Ontario LC Regional Championships | 2025-06-05 |
| 200m Freestyle | 2:01.94 | uOttawa_vs._Carleton_Vs._Waterloo Tri Meet 2025 | 2025-10-18 |
| 200m IM | 2:12.99 | uOttawa_vs._Carleton_vs._Queens Tri Meet 2026 | 2026-01-22 |
| 400m Freestyle | 4:17.08 | East Coast Championships | 2025-07-10 |
| 400m Freestyle | 4:07.21 | Coupe_Universitaire_3_11082025 | 2025-11-08 |
| 400m IM | 4:54.23 | East Coast Championships | 2025-07-10 |
| 800m Freestyle | 8:53.21 | East Coast Championships | 2025-07-10 |
Louis Lalonde's top personal bests include 100m Breaststroke (1:12.15), 200m Backstroke (2:22.27), 200m Butterfly (2:19.25), 200m Butterfly (2:11.50), 200m Freestyle (2:01.28).
Louis Lalonde swims for University of Ottawa Gee-Gees.
Louis Lalonde has competed in 5 meets.