The Women's 100 metre freestyle competition of the swimming events at the 2015 World Aquatics Championships was held on 6 August with the heats and the semifinals and 7 August with the final.

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

The heats were held at 09:30.

[2] The semifinals were held at 17:32.

[3] The final was held on 7 August at 17:32.