Greece competed at the 2013 World Aquatics Championships in Barcelona, Spain between 19 July and 4 August 2013.
Greece nominated two athletes to participate.
Greece nominated four athletes (two men and two women) to participate.
Greek 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):
Greece has qualified thirteen synchronized swimmers.
<small><nowiki>*</nowiki> Reserves</small>
The following is the Greek roster in the men's water polo tournament of the 2013 World Aquatic championships.