| Games: | World Aquatics Championships |
| Nf: | SRI |
| Nfname: | Sri Lanka Aquatics Sports Union |
| Year: | 2019 |
| Flagcaption: | Flag of Sri Lanka |
| Location: | Gwangju, South Korea |
| Competitors: | 3 |
| Sports: | 1 |
| Gold: | 0 |
| Silver: | 0 |
| Bronze: | 0 |
| Appearances: | auto |
| See also: | FINA Independent Athletes (2015) |
Sri Lanka competed at the 2019 World Aquatics Championships in Gwangju, South Korea from 12 to 28 July.
See main article: Swimming at the 2019 World Aquatics Championships.
Sri Lanka qualified four swimmers. One swimmer did not participated.[1]
| Athlete | Event | Heat | Semifinal | Final | ||||
|---|---|---|---|---|---|---|---|---|
| Time | Rank | Time | Rank | Time | Rank | |||
| align=left rowspan=2 | Dimuth Peiris | 50 m backstroke | 27.18 | 55 | did not advance | |||
| 100 m backstroke | 59.62 | 54 | did not advance | |||||
| Athlete | Event | Heat | Semifinal | Final | ||||
|---|---|---|---|---|---|---|---|---|
| Time | Rank | Time | Rank | Time | Rank | |||
| align=left rowspan=2 | Aniqah Gaffoor | 50 m butterfly | 30.36 | 49 | did not advance | |||
| 100 m butterfly | 1:12.63 | 49 | did not advance | |||||
| align=left rowspan=2 | Kimiko Raheem | 50 m freestyle | 27.56 | 57 | did not advance | |||
| 100 m backstroke | 1:06.52 | 50 | did not advance | |||||