The fastest short course swimming 100 metres individual medley is 50.71 by Ryan Lochte (USA) at Istanbul, Turkey on December 15, 2012. The record-breaking swim came in the semi-final of the event at the FINA World Championships.
Fastest swim short course 100 metres medley (male)
- Ryan Lochte
- 50.71 minute(s), second(s)
- Turkey Istanbul