Swimming at the 2019 World Aquatics Championships – Men's 100 metre butterfly


The Men's 100 metre butterfly competition at the 2019 World Championships was held on 26 and 27 July 2019. The defending champion Caeleb Dressel broke Michael Phelps' ten-year-old record by 0.32 second in the semi-final, setting a new world-record time of 49.50 seconds. Dressel won the final held the following day, defending his title.

Records

Prior to the competition, the existing world and championship records were as follows.
The following new records were set during this competition.
DateEventNameNationalityTimeRecord
26 July[|Semifinal]Caeleb Dressel49.50, CR

Results

Heats

The heats were held on 26 July at 10:00.

Semifinals

The semifinals were held on 26 July at 20:10.

Semifinal 1

Semifinal 2

Final

The final was started on 27 July at 20:43.
RankLaneNameNationalityTimeNotes
4Caeleb Dressel49.66
5Andrey Minakov50.83NR
6Chad le Clos51.16
43Kristóf Milák51.26
57Mehdy Metella51.38
68Matthew Temple51.51
71James Guy51.62
82Marius Kusch51.66