Swimming at the 2019 World Aquatics Championships – Women's 100 metre butterfly

The Women's 100 metre butterfly competition at the 2019 World Championships was held on 21 and 22 July 2019.

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

Heats
The heats were held on 21 July at 10:45.

Semifinals
The semifinals were held on 21 July at 20:12.

Final
The final was held on 22 July at 20:10.