Water polo at the 2009 World Aquatics Championships – Men's tournament

	Qualified for the quarterfinals
	Qualified for the eightfinals
	Will play for places 13–16

The men's water polo tournament at the 2009 World Aquatics Championships in Rome was held from 20 July to 1 August. It was won by Serbia. All matches were held in a temporary pool at the tennis stadium of the Foro Italico.

If two teams shall have equal points, further classification shall be established as follows:

If there is more than one tie in a group, the highest placed tie shall be determined first.

If three or more teams shall have equal points, further classification shall be established as follows:

If there is more than one tie in a group, the highest placed tie shall be determined first.