The women's 50 metre butterfly event in swimming at the 2013 World Aquatics Championships took place on 2–3 August at the Palau Sant Jordi in Barcelona, Spain.

[1][2] Prior to this competition, the existing world and championship records were: The heats were held at 10:24.

[5] The swim-off was held at 11:29.

[6] The semifinals were held at 19:15.

[7] The final was held at 18:02.