Swimming at the 2009 World Aquatics Championships – Men's 50 metre freestyle

The heats for the men's 50 metre freestyle race at the 2009 World Championships took place on 31 July (heats and semifinals) and 1 August 2009 (final) at the Foro Italico in Rome, Italy.

Records
Prior to this competition, the existing world and competition records were as follows:

The following records were established during the competition: