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

Open water swimming

Belgium qualified one male open water swimmer.

AthleteEventTimeRankLogan VanhuysMen's 10 km1:48:17.515

Swimming

Belgium entered 10 swimmers.

Men AthleteEventHeatSemifinalFinalTimeRankTimeRankTimeRankLouis Croenen200 m butterfly1:56.356 Q1:59.1215did not advancePieter Timmers50 m freestyle22.3220did not advance100 m freestyle48.76=14 Q48.9116did not advanceSebastien De MeulemeesterJasper AerentsThomas ThijsPieter Timmers freestyle relay3:15.3414colspan=2 did not advanceLouis CroenenAlexandre MarcourtThomas ThijsSebastien De Meulemeester freestyle relay7:12.9913colspan=2 did not advance

Women AthleteEventHeatSemifinalFinalTimeRankTimeRankTimeRankKimberly Buys50 m butterfly26.2314 Q26.5116did not advance100 m butterfly59.2625did not advanceValentine Dumont100 m freestyle54.9027did not advance200 m freestyle1:59.11=15 Q1:58.7815did not advance400 m freestyle4:12.9218colspan=2 did not advance200 m butterfly2:13.7824did not advanceFanny Lecluyse50 m breaststroke31.4218did not advance100 m breaststroke1:07.279 Q1:06.97SO: 1:07.2217did not advance200 m breaststroke2:25.057 Q2:23.766 Q2:25.237Fleur Vermeiren50 m breaststroke31.3616 Q31.7416did not advance

References