Comoros competed at the 2011 World Aquatics Championships in Shanghai, China between July 16 and 31, 2011.
Comoros qualified 3 swimmers.[1]
| Athlete | Event | Heats | Semifinals | Final | |||
|---|---|---|---|---|---|---|---|
| Time | Rank | Time | Rank | Time | Rank | ||
| Athoumani Youssouf | Men's 50m Freestyle | 28.52 | 96 | Did not advance | |||
| Men's 100m Freestyle | 1:04.75 | 100 | Did not advance | ||||
| Ahmed Chawali | Men's 50m Freestyle | 28.82 | 100 | Did not advance | |||
| Men's 100m Freestyle | DSQ | Did not advance | |||||
| Athlete | Event | Heats | Semifinals | Final | |||
|---|---|---|---|---|---|---|---|
| Time | Rank | Time | Rank | Time | Rank | ||
| Sihame Ayouba Ali | Women's 100m Freestyle | 1:21.54 | 77 | Did not advance | |||