Swimming at the 2023 World Aquatics Championships – Women's 100 metre butterfly

The women's 100 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 11:21.

Semifinals
The semifinals were started on 23 July at 20:12.

Final
The final was held on 24 July at 20:09.