Tonga competed at the 2011 World Aquatics Championships in Shanghai, China between July 16 and 31, 2011.
Swimming[edit]
Tonga qualified 2 swimmers.[1]
- Men
| Athlete | Event | Heats | Semifinals | Final | |||
|---|---|---|---|---|---|---|---|
| Time | Rank | Time | Rank | Time | Rank | ||
| Amini Fonua | Men's 50m Breaststroke | 28.23 | 25 | did not advance | |||
| Men's 100m Breaststroke | 1:04.02 | 59 | did not advance | ||||
| Ifalemi Paea | Men's 50m Butterfly | 25.50 | 36 | did not advance | |||
| Men's 100m Butterfly | 56.60 | 49 | did not advance | ||||