| Games: | World Aquatics Championships |
| Nf: | ANT |
| Nfname: | Antigua and Barbuda Swimming Federation |
| Year: | 2019 |
| Flagcaption: | Flag of Antigua and Barbuda |
| Location: | Gwangju, South Korea |
| Competitors: | 4 |
| Sports: | 1 |
| Gold: | 0 |
| Silver: | 0 |
| Bronze: | 0 |
| Appearances: | auto |
Antigua and Barbuda 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.
Antigua and Barbuda entered four swimmers.[1]
| Athlete | Event | Heat | Semifinal | Final | ||||
|---|---|---|---|---|---|---|---|---|
| Time | Rank | Time | Rank | Time | Rank | |||
| align=left rowspan=2 | Noah Mascoll-Gomes | 100 m freestyle | 52.12 | =73 | did not advance | |||
| 200 m freestyle | 1:54.20 | 56 | did not advance | |||||
| align=left rowspan=2 | Stefano Mitchell | 50 m freestyle | 23.44 | 62 | did not advance | |||
| 50 m butterfly | 25.69 | 65 | did not advance | |||||
| Athlete | Event | Heat | Semifinal | Final | ||||
|---|---|---|---|---|---|---|---|---|
| Time | Rank | Time | Rank | Time | Rank | |||
| align=left rowspan=2 | Olivia Fuller | 200 m freestyle | 2:19.71 | 57 | did not advance | |||
| 50 m butterfly | 30.88 | 52 | did not advance | |||||
| align=left rowspan=2 | Samantha Roberts | 50 m freestyle | 27.27 | 52 | did not advance | |||
| 100 m freestyle | 1:00.53 | 68 | did not advance | |||||