| Games: | World Aquatics Championships |
| Nf: | SLO |
| Nfname: | Slovenian Swimming Association |
| Year: | 2019 |
| Flagcaption: | Flag of Slovenia |
| Location: | Gwangju, South Korea |
| Appearances: | auto |
| App Begin Year: | 1994 |
| See also: | (1973–1991) |
Slovenia competed at the 2019 World Aquatics Championships in Gwangju, South Korea from 12 to 28 July.
See main article: Open water swimming at the 2019 World Aquatics Championships. Slovenia qualified one female open water swimmers.[1]
| Athlete | Event | Time | Rank | |
|---|---|---|---|---|
| align=left rowspan=2 | Špela Perše | Women's 5 km | 58:12.1 | 16 |
| Women's 10 km | 1:55:44.4 | 27 |
See main article: Swimming at the 2019 World Aquatics Championships.
Slovenia entered four swimmers.[2]
| Athlete | Event | Heat | Semifinal | Final | ||||
|---|---|---|---|---|---|---|---|---|
| Time | Rank | Time | Rank | Time | Rank | |||
| align=left rowspan=2 | Peter John Stevens | 50 m breaststroke | 27.50 | 22 | did not advance | |||
| 100 m breaststroke | 1:01.90 | 39 | did not advance | |||||
| Athlete | Event | Heat | Semifinal | Final | ||||
|---|---|---|---|---|---|---|---|---|
| Time | Rank | Time | Rank | Time | Rank | |||
| align=left rowspan=3 | Katja Fain | 200 m freestyle | 2:00.38 | 22 | did not advance | |||
| 400 m freestyle | 4:17.57 | 26 | did not advance | |||||
| 400 m individual medley | 4:48.24 | 20 | did not advance | |||||
| align=left rowspan=3 | Neža Klančar | 50 m freestyle | 25.12 | 18 | did not advance | |||
| 100 m freestyle | 54.88 | 25 | did not advance | |||||
| 200 m individual medley | 2:16.53 | 24 | did not advance | |||||
| align=left rowspan=2 | Tjaša Oder | 800 m freestyle | 8:30.97 | 9 | did not advance | |||
| 1500 m freestyle | 16:10.14 | 9 | did not advance | |||||