Open water swimming at the 2009 World Aquatics Championships – Men's 25 km

The Men's 25 km Open Water swimming race took place on Saturday, 25 July, at Ostia beach in Rome. 23 men from 15 different countries competed. Valerio Cleri of Italy took home the gold with a time of 5:26:31.6.

Results
Key: OTL = Over Time Limit, DSQ = Disqualified, DNF = Did not finish, DNS = Did not start