Swimming at the 2015 World Aquatics Championships – Women's 100 metre butterfly

The Women's 100 metre butterfly competition of the swimming events at the 2015 World Aquatics Championships was held on 2 August with the heats and the semifinals and 3 August with the final.

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

The following new records were set during this competition.

Heats
The heats were held on 2 August at 09:30.

Swim-off
The swim-off was held at 11:56.

Semifinals
The semifinals were held on 2 August at 17:32.

Final
The final was held on 3 August at 17:40.