The Men's 200 metre butterfly competition at the 2019 World Championships was held on 23 and 24 July 2019.

[1][2] The event was won by Kristóf Milák, who broke a 10-year-old record set by Michael Phelps, and set a new world-record time of 1:50.73 in the process.

[3] Prior to the competition, the existing world and championship records were as follows.

The following new records were set during this competition.

[4] The semifinals were held on 23 July at 21:35.