The women's 100 metre butterfly event in swimming at the 2013 World Aquatics Championships took place on 28–29 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.[6]
The swim-off was held at 12:09.[7]
The semifinals were held at 18:02.[8]
The final was held at 18:10.[9]
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