| Women's 100 metre butterfly at the 1998 FINA World Championships |
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| Date | 15 January 1998 | |||||||||
| Winning time | 58.46 seconds | |||||||||
| Medalists | ||||||||||
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The finals and the qualifying heats of the women's 100 metre butterfly event at the 1998 World Aquatics Championships were held on Thursday 15 January 1998 in Perth, Australia.