World record progression 50 metres butterfly

This is a history of the progression of the World Record for the Swimming event: the 50 butterfly. It is a listing of the fastest-time-ever in the event, in both long course (50m) and short course (25m) swimming pool. These records are maintained/recognized by FINA, which oversees international competitive swimming and Aquatics.

The World Records in the 50s of stroke are the youngest Swimming World Records; FINA first recognizing them in the 1990s.