Swimming at the 1998 World Aquatics Championships – Women's 100 metre butterfly
# Swimming at the 1998 World Aquatics Championships – Women's 100 metre butterfly

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, Western Australia.

## A Final

| Rank | Name | Time |
| - | - | - |
| | Jenny Thompson (USA) | 58.46 CR |
| | Ayari Aoyama (JPN) | 58.79 |
| | Petria Thomas (AUS) | 58.97 |
| 4 | Misty Hyman (USA) | 59.12 |
| 5 | Susie O'Neill (AUS) | 59.27 |
| 6 | Martina Moravcová (SVK) | 59.47 |
| 7 | Inge de Bruijn (NED) | 1:00.09 |
| 8 | Hitomi Kashima (JPN) | 1:00.43 |

## B Final

| Rank | Name | Time |
| - | - | - |
| 9 | Mette Jacobsen (DEN) | 1:00.71 |
| 10 | Johanna Sjöberg (SWE) | 1:00.99 |
| 11 | Katrin Jäke (GER) | 1:01.24 |
| 12 | Sophia Skou (DEN) | 1:01.43 |
| 13 | Elena Nazemnova (RUS) | 1:01.55 |
| 14 | Cécile Jeanson (FRA) | 1:01.57 |
| 15 | Jessica Deglau (CAN) | 1:01.61 |
| 16 | Anna Nyiry (HUN) | 1:01.98 |
