Fastest swim long course 100 metres breaststroke (male)
- Who
- Adam Peaty
- What
- 56.88 minute(s):second(s)
- Where
- Korea (Republic of) (Gwangju)
- When
- 21 July 2019
The fastest swim long course 100 metres breaststroke (male) is 56.88 seconds, and was achieved by Adam Peaty (UK) at the Swimming World Championships 2019, in Gwangju, Republic of Korea, on 21 July 2019.
Peaty broke his own world record to become the first person to break the 57 second barrier.