| Event | Time | Meet | Date |
|---|---|---|---|
| 100m Backstroke | 1:35.64 | 2025 Murray Drudge Invitational | 2025-12-05 |
| 100m Breaststroke | 1:47.86 | 2025 Murray Drudge Invitational | 2025-12-05 |
| 100m Butterfly | 2:02.54 | 2025 Murray Drudge Invitational | 2025-12-05 |
| 100m Freestyle | 1:31.71 | 2025 NYAC Cup | 2025-11-14 |
| 200m IM | 3:38.01 | 2025 Murray Drudge Invitational | 2025-12-05 |
| 50m Backstroke | 43.54 | 2026 Central Region Div 2 SC Championships | 2026-02-20 |
| 50m Breaststroke | 48.21 | 2026 Central Region Div 2 SC Championships | 2026-02-20 |
| 50m Butterfly | 47.18 | 2025 Red vs Black #1 | 2025-10-05 |
| 50m Freestyle | 38.80 | 2025 Red vs Black #1 | 2025-10-05 |
Chang, Sienna's top personal bests include 100m Backstroke (1:35.64), 100m Breaststroke (1:47.86), 100m Butterfly (2:02.54), 100m Freestyle (1:31.71), 200m IM (3:38.01).
Chang, Sienna swims for North York Aquatic Club.
Chang, Sienna has competed in 6 meets.