The United States competed at the 2019 World Aquatics Championships in Gwangju, South Korea from 12 to 28 July.

The United States qualified four male and five female open water swimmers.

[3][4] Legend: (*) = Swimmers who participated in the heat only.

Team roster[5] Group play

Playoffs 9th–12th place semifinals 9th place game Quarterfinals Semifinals Gold medal final