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

The Men's 100 metre backstroke competition at the 2019 World Championships was held on 22 and 23 July 2019. The defending champion was Xu Jiayu, and he successfully defended his title. Jiayu set a competition record in the semifinals by winning his semifinal in 52.17 seconds.

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

The Men's 100 metre backstroke competition at the 2019 World Championships was held on 22 and 23 July 2019. The defending champion was Xu Jiayu, and he successfully defended his title. Jiayu set a competition record in the semifinals by winning his semifinal in 52.17 seconds.