Swimming at the 2018 Summer Youth Olympics – Girls' 50 metre butterfly
The girls' 50 metre butterfly event at the 2018 Summer Youth Olympics took place on 9 and 10 October at the Natatorium in Buenos Aires, Argentina. Results

Heats
The heats were started on 9 October at 10:22. Swim-off
The swim-off was held on 9 October at 11:31. Semifinals
The semifinals were started on 9 October at 18:13. Final

The final was held on 10 October at 18:29. References

Swimming at the 2018 Summer Youth Olympics