| Event | Time | Meet | Date |
|---|---|---|---|
| 100m IM | 2:12.79 | LAC - Fall Start Up | 2025-10-19 |
| 50m Backstroke | 59.61 | LAC - Fall Start Up | 2025-10-19 |
| 50m Breaststroke | 1:08.46 | LAC - Fall Start Up | 2025-10-19 |
| 50m Freestyle | 53.41 | LAC - Fall Start Up | 2025-10-19 |
Lee, Hajoon's top personal bests include 100m IM (2:12.79), 50m Backstroke (59.61), 50m Breaststroke (1:08.46), 50m Freestyle (53.41).
Lee, Hajoon swims for London Aquatic Club.
Lee, Hajoon has competed in 1 meets.