Swimming at the 2011 World Aquatics Championships – Women's 100 metre butterfly
| Men's 200 metre freestyle at the 2011 World Aquatics Championships |
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| Dates | 24 July 2011 (heats and semifinals) 25 July 2011 (final) |
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| Competitors | 47 from 40 nations | |||||||||
| Winning time | 56.87 | |||||||||
| Medalists | ||||||||||
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The women's 100 metre butterfly competition of the swimming events at the 2011 World Aquatics Championships took place on 24 and 25 July. The heats and semifinals took place on 24 July and the final was held on 25 July.
Prior to the competition, the existing world and championship records were as follows.
47 swimmers participated in 6 heats, qualified swimmers are listed:
As two swimmers had the same time in the heats at place 17 they had to participate in a swimoff to determine the first semifinal reserve swimmer.
The semifinals were held on 24 July at 18:00.
The final was held at 18:02.
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