Swimming at the 2009 World Aquatics Championships – Men's 200 metre butterfly

The heats for the men's 200 metre butterfly race at the 2009 World Championships took place in the morning of 28 July, with the final in the evening session of 29 July 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: