Swimming at the 2003 World Aquatics Championships – Women's 50 metre butterfly
The Women's 50m Butterfly event at the 10th FINA World Aquatics Championships swam on July 25 – 26, 2003 in Barcelona, Spain. Preliminary and Semifinal heats swam on July 25, with the Final swum on July 26.
At the start of the event, the World and Championship records were:
Final
Semifinals
Preliminaries
