The women's 100 metre backstroke event in swimming at the 2013 World Aquatics Championships took place on 29–30 July 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 10:00.

[4] The semifinals were held at 18:55.

[5] The final was held at 18:10.

[6]