Competitors57 from 49 nations Dates2 Aug 2013 – 3 Aug 2013
Winning time51.06 VenuePalau Sant Jordi
LocationPalau Sant Jordi, Barcelona, Spain
The men's 100 metre butterfly event in swimming at the 2013 World Aquatics Championships took place on 2–3 August at the Palau Sant Jordi in Barcelona, Spain.