| Event | Time | Meet | Date |
|---|---|---|---|
| 100m Butterfly | 1:10.83 | SKSC Winterfest | 2026-01-24 |
| 100m Freestyle | 1:06.08 | BC Winter Divisionals - Vancouver & Fraser | 2026-02-20 |
| 100m IM | 1:17.91 | SKSC Summerfest 2025 | 2025-07-26 |
| 200m Backstroke | 2:39.94 | SKSC Winterfest | 2026-01-24 |
| 200m Breaststroke | 3:03.79 | SKSC Winterfest | 2026-01-24 |
| 200m Butterfly | 2:45.48 | SKSC Winterfest | 2026-01-24 |
| 200m Freestyle | 2:34.81 | PSW Spring Invitational | 2025-04-12 |
| 200m IM | 2:43.76 | SKSC Summerfest 2025 | 2025-07-26 |
| 50m Backstroke | 36.25 | SKSC Summerfest 2025 | 2025-07-26 |
| 50m Butterfly | 30.95 | BC Winter Divisionals - Vancouver & Fraser | 2026-02-20 |
| 50m Freestyle | 29.58 | BC Winter Divisionals - Vancouver & Fraser | 2026-02-20 |
Deng, Cecilia's top personal bests include 100m Butterfly (1:10.83), 100m Freestyle (1:06.08), 100m IM (1:17.91), 200m Backstroke (2:39.94), 200m Breaststroke (3:03.79).
Deng, Cecilia swims for HYACK SWIM CLUB.
Deng, Cecilia has competed in 7 meets.