Qatar competed at the 2011 World Aquatics Championships in Shanghai, China between July 16 and 31, 2011.
Qatar qualified 2 swimmers.[1]
| Athlete | Event | Heats | Semifinals | Final | |||
|---|---|---|---|---|---|---|---|
| Time | Rank | Time | Rank | Time | Rank | ||
| Ahmed Atari | Men's 50m Backstroke | 32.37 | 34 | Did not advance | |||
| Men's 400m IM | 5:16.80 | 34 | Did not advance | ||||
| Adbulrahman Alishaq | Men's 50m Backstroke | DNS | Did not advance | ||||
| Men's 400m IM | DNS | Did not advance | |||||