| Event | Time | Meet | Date |
|---|---|---|---|
| 100m Backstroke | 1:09.91 | Titans Medley Add-Up | 2025-04-19 |
| 100m Breaststroke | 1:26.97 | Titans Medley Add-Up | 2025-04-19 |
| 100m Butterfly | 1:05.68 | Titans Medley Add-Up | 2025-04-19 |
| 200m Butterfly | 2:37.15 | 2025 Summer Divisionals - Vancouver & Fraser | 2025-06-27 |
| 200m Freestyle | 2:09.62 | RMSC Spring Invitational | 2025-03-08 |
| 200m IM | 2:29.49 | RMSC Spring Invitational | 2025-03-08 |
| 400m Freestyle | 4:48.03 | 2025 Summer Divisionals - Vancouver & Fraser | 2025-06-27 |
| 400m IM | 5:21.64 | RMSC Spring Invitational | 2025-03-08 |
| 50m Backstroke | 33.17 | RMSC Spring Invitational | 2025-03-08 |
| 50m Breaststroke | 39.12 | RMSC Spring Invitational | 2025-03-08 |
| 50m Butterfly | 30.09 | 2025 Summer Divisionals - Vancouver & Fraser | 2025-06-27 |
| 50m Freestyle | 26.95 | Titans Medley Add-Up | 2025-04-19 |
Dolzhenko, Illya's top personal bests include 100m Backstroke (1:09.91), 100m Breaststroke (1:26.97), 100m Butterfly (1:05.68), 200m Butterfly (2:37.15), 200m Freestyle (2:09.62).
Dolzhenko, Illya swims for Ridge Meadows Swim Club.
Dolzhenko, Illya has competed in 4 meets.