Swimming at the 2023 World Aquatics Championships – Men's 50 metre butterfly

The men's 50 metre butterfly competition at the 2023 World Aquatics Championships was held on 23 and 24 July 2023.

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

Heats
The heats were started on 23 July at 11:35.

Semifinals
The semifinals were started on 23 July at 20:23.

Swim-off
The swim-off was started on 23 July at 22:16.

Final
The final was started on 24 July at 21:32.