- Kliment Kolesnikov
- 48.90 second(s)
- Russian Federation (St Petersburg)
The fastest short course 100 metres backstroke swim by a male is 48.90 seconds and was achieved by Kliment Kolesnikov (Russia) at the Vladimir Salnikov Cup in St Petersburg, Russia, on 22 December 2017. It was the 17-year-old’s first senior world record.