The Northern Mariana Islands competed at the 2019 World Aquatics Championships in Gwangju, South Korea from 12 to 28 July.
Swimming
Northern Mariana Islands entered four swimmers.
Men AthleteEventHeatSemifinalFinalTimeRankTimeRankTimeRankLennosuke Suzuki100 m freestyle57.83107did not advance100 m breaststroke1:20.9786did not advanceJuhn Tenorio50 m backstroke29.4263did not advance100 m backstroke1:04.9161did not advance
Women AthleteEventHeatSemifinalFinalTimeRankTimeRankTimeRankJin Ju Thompson100 m freestyle1:10.3187did not advance200 m freestyle2:32.3560did not advanceAika Watanabe50 m backstroke35.0442did not advance50 m butterfly33.4359did not advance
Mixed AthleteEventHeatFinalTimeRankTimeRankJuhn TenorioLennosuke SuzukiAika WatanabeJin Ju Thompson4×100 m medley relay4:56.2035did not advance
References