2019 World Para Swimming Championships – Men's 100 metre butterfly
# 2019 World Para Swimming Championships – Men's 100 metre butterfly

The men's 100m butterfly events at the 2019 World Para Swimming Championships were held in the London Aquatics Centre at the Queen Elizabeth Olympic Park in London between 9–15 September.

## Medalists

| Event | Gold | Silver | Bronze |
| - | - | - | - |
| S8 | Dimosthenis Michalentzakis Greece | Robert Griswold United States | Michal Golus Poland |
| S9 | Simone Barlaam Italy | Federico Morlacchi Italy | Alexander Skaliukh Russia |
| S10 | Maksym Krypak Ukraine | Stefano Raimondi Italy | Col Pearse Australia |
| S11 | Keiichi Kimura Japan | Uchu Tomita Japan | Kirill Belousov Russia |
| S12 | Dzmitry Salei Belarus | Stephen Clegg Great Britain | Yaroslav Denysenko Ukraine |
| S13 | Ihar Boki Belarus | Islam Aslanov Uzbekistan | Oleksii Virchenko Ukraine |
| S14 | Reece Dunn Great Britain | Lawrence Sapp United States | Dai Tokairin Japan |
