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Cambodia competed at the 2011 World Aquatics Championships in Shanghai, China between July 16 and 31, 2011.
Cambodia qualified 3 swimmers.[1]
| Athlete | Event | Heats | Semifinals | Final | |||
|---|---|---|---|---|---|---|---|
| Time | Rank | Time | Rank | Time | Rank | ||
| Chamraen Youri Maximov | Men's 50m Freestyle | 27.48 | 83 | did not advance | |||
| Men's 400m Freestyle | 4:55.35 | 49 | did not advance | ||||
| Ponloeu Hem Thon | Men's 50m Freestyle | 27.22 | 81 | did not advance | |||
| Men's 50m Breaststroke | 33.48 | 42 | did not advance | ||||
| Athlete | Event | Heats | Semifinals | Final | |||
|---|---|---|---|---|---|---|---|
| Time | Rank | Time | Rank | Time | Rank | ||
| Vitiny Hemthon | Women's 50m Freestyle | 31.45 | 70 | did not advance | |||
| Women's 50m Backstroke | 36.57 | 54 | did not advance | ||||