The Women's 50 metre backstroke competition of the swimming events at the 2015 World Aquatics Championships was held on 5 August with the heats and the semifinals and 6 August with the final.

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

The heats were held on 5 August at 09:30.

[2] The semifinals were held at 17:42.

[3] The final was held at 18:49.