Swimming at the 2011 World Aquatics Championships – Men's 100 metre freestyle

The men's 100 metre freestyle competition of the swimming events at the 2011 World Aquatics Championships was held on July 27 with the heats and the semifinals and July 28 with the finale.

Records
Prior to the competition, the existing world and championship records were as follows.

Heats
106 swimmers participated in 14 heats.

Semifinals
The semifinals were held at 18:02.

Final
The final was held at 18.35.