Guatemala at the 2019 World Aquatics Championships
Guatemala competed at the 2019 World Aquatics Championships in Gwangju, South Korea from 12 to 28 July.
Open water swimming
Guatemala qualified one male and one female open water swimmers.;Men
| Athlete | Event | Time | Rank |
| Santiago Reyes | Men's 5 km | 1:01:51.7 | 57 |
| Santiago Reyes | Men's 10 km | 2:08:27.5 | 69 |
;Women
| Athlete | Event | Time | Rank |
| Yanci Vanegas | Women's 5 km | 1:06:24.4 | 50 |
| Yanci Vanegas | Women's 10 km | 2:11:59.1 | 56 |
Swimming
Guatemala entered four swimmers.;Men
;Women