Lesotho competed at the 2011 World Aquatics Championships in Shanghai, China between July 16 and 31, 2011.
Lesotho qualified 3 swimmers.[1]
| Athlete | Event | Heats | Semifinals | Final | |||
|---|---|---|---|---|---|---|---|
| Time | Rank | Time | Rank | Time | Rank | ||
| Seele Benjamin Ntai | Men's 50m Freestyle | 32.74 | 111 | Did not advance | |||
| Tsepo Mafa | Men's 50m Freestyle | 34.54 | 114 | Did not advance | |||
| Athlete | Event | Heats | Semifinals | Final | |||
|---|---|---|---|---|---|---|---|
| Time | Rank | Time | Rank | Time | Rank | ||
| Masempe Theko | Women's 50m Freestyle | 49.75 | 87 | Did not advance | |||