| Games: | World Aquatics Championships |
| Nf: | MGL |
| Nfname: | Mongolian Amateur Swimming Federation |
| Year: | 2019 |
| Flagcaption: | Flag of Mongolia |
| Location: | Gwangju, South Korea |
| Competitors: | 4 |
| Sports: | 1 |
| Gold: | 0 |
| Silver: | 0 |
| Bronze: | 0 |
| Appearances: | auto |
| App Begin Year: | 2001 |
Mongolia 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.
Mongolia entered four swimmers.[1]
| Athlete | Event | Heat | Semifinal | Final | ||||
|---|---|---|---|---|---|---|---|---|
| Time | Rank | Time | Rank | Time | Rank | |||
| align=left rowspan=2 | Günsennorovyn Zandanbal | 50 m breaststroke | 30.23 | =61 | did not advance | |||
| 100 m breaststroke | 1:07.92 | 79 | did not advance | |||||
| align=left rowspan=2 | Myagmaryn Delgerkhüü | 50 m freestyle | 23.93 | 72 | did not advance | |||
| 100 m freestyle | 54.43 | 92 | did not advance | |||||
| Athlete | Event | Heat | Semifinal | Final | ||||
|---|---|---|---|---|---|---|---|---|
| Time | Rank | Time | Rank | Time | Rank | |||
| align=left rowspan=2 | Batbayaryn Enkhkhüslen | 50 m freestyle | 27.66 | 58 | did not advance | |||
| 100 m freestyle | 59.76 | 59 | did not advance | |||||
| align=left rowspan=2 | Khuyagbaataryn Enkhzul | 50 m butterfly | 30.80 | 51 | did not advance | |||
| 100 m butterfly | 1:14.23 | 50 | did not advance | |||||