Hong Kong competed at the 2013 World Aquatics Championships in Barcelona, Spain between 19 July and 4 August 2013.

Hong Kong qualified five quota places for the following diving events.

[1] Hong Kong qualified four quota places for the following events in open water swimming.

[2] Hong Kong swimmers earned qualifying standards in the following events (up to a maximum of 2 swimmers in each event at the A-standard entry time, and 1 at the B-standard):[3][4] Hong Kong has qualified two synchronized swimmers.

[5]