| Event: | Men's 100 metre butterfly |
| Competition: | 1998 FINA World Championships |
| Date: | 16 January 1998 |
| Competitors: | 39 |
| Win Value: | 52.25 seconds |
| Gold: | Michael Klim |
| Goldnoc: | AUS |
| Silver: | Lars Frölander |
| Silvernoc: | SWE |
| Bronze: | Geoff Huegill |
| Bronzenoc: | AUS |
| Prev: | 1994 |
| Next: | 2001 |
The finals and the qualifying heats of the men's 100 metre butterfly event at the 1998 World Aquatics Championships were held on Friday 1998-01-16 in Perth, Western Australia.
| Rank | Name | Time | |
|---|---|---|---|
| 52.25 CR | |||
| 52.79 | |||
| 52.90 | |||
| 4 | 52.94 | ||
| 5 | 53.37 | ||
| 6 | 53.53 | ||
| 7 | 53.59 | ||
| 8 | 53.60 |
| Rank | Name | Time | |
|---|---|---|---|
| 9 | 53.85 | ||
| 10 | 53.95 | ||
| 11 | 54.05 | ||
| 12 | 54.33 | ||
| 13 | 54.38 | ||
| 14 | 54.63 | ||
| 15 | 54.80 | ||
| 16 | 54.95 |
| Rank | Name | Time | |
|---|---|---|---|
| 1 | 52.93 CR | ||
| 2 | 53.19 | ||
| 3 | 53.30 | ||
| 4 | 53.34 | ||
| 5 | 53.48 | ||
| 6 | 53.73 | ||
| 7 | 53.76 | ||
| 8 | 53.84 | ||
| 9 | 54.01 | ||
| 10 | 54.12 | ||
| 11 | 54.14 | ||
| 12 | 54.34 | ||
| 13 | [1] | 54.47 | |
| 14 | 54.50 | ||
| 15 | 54.60 | ||
| 16 | [2] | 54.70 | |
| 17 | 54.76 | ||
| 18 | 54.82 | ||
| 19 | 54.98 | ||
| 20 | 55.00 | ||
| 21 | 55.04 | ||
| 22 | 55.07 | ||
| 23 | 55.24 | ||
| 24 | 55.35 | ||
| 25 | 55.51 | ||
| 26 | 55.53 | ||
| 27 | 55.73 | ||
| 29 | 55.75 | ||
| 31 | 55.78 | ||
| 32 | 55.90 | ||
| 33 | 56.02 | ||
| 34 | 56.09 | ||
| 35 | 56.12 | ||
| 37 | 56.14 | ||
| 38 | 56.21 | ||
| 39 | 56.22 |
Note: This is not a complete list of results. The SwimNews source below lists 70 swimmers entered in the event. One of the non-list swimmers is very likely Kamal Salman Masud who set a Pakistan Record of 58.19.