The Men's 100 metre freestyle competition at the 2019 World Championships was held on 24 and 25 July 2019.

Records

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

Results

The heats were held on 24 July at 10:15.

The semifinals were held on 24 July at 20:26.

The final was held on 25 July at 20:22.Final results
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{{DEFAULTSORT:2019 World Aquatics Championships - Men's 100 metre freestyle Men's 100 metre freestyle