| Games: | World Aquatics Championships |
| Nf: | GUY |
| Nfname: | Guyana Amateur Swimming Association |
| Year: | 2019 |
| Flagcaption: | Flag of Guyana |
| Location: | Gwangju, South Korea |
| Competitors: | 3 |
| Sports: | 1 |
| Gold: | 0 |
| Silver: | 0 |
| Bronze: | 0 |
| Appearances: | auto |
Guyana 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.
Guyana entered three swimmers.[1]
| Athlete | Event | Heat | Semifinal | Final | ||||
|---|---|---|---|---|---|---|---|---|
| Time | Rank | Time | Rank | Time | Rank | |||
| align=left rowspan=2 | Andrew Fowler | 50 m freestyle | 25.26 | 97 | did not advance | |||
| 100 m freestyle | 54.72 | 93 | did not advance | |||||
| align=left rowspan=2 | Leon Seaton | 50 m backstroke | 29.92 | 65 | did not advance | |||
| 50 m butterfly | 28.54 | 77 | did not advance | |||||
| Athlete | Event | Heat | Semifinal | Final | ||||
|---|---|---|---|---|---|---|---|---|
| Time | Rank | Time | Rank | Time | Rank | |||
| align=left rowspan=2 | Jamila Sanmoogan | 50 m freestyle | 28.72 | 68 | did not advance | |||
| 50 m butterfly | 30.21 | 47 | did not advance | |||||