Swimming at the 2014 Summer Youth Olympics – Girls' 100 metre butterfly

The girls' 100 metre butterfly event in swimming at the 2014 Summer Youth Olympics took place on 21–22 August at the Nanjing Olympic Sports Centre in Nanjing, China.

Heats
The heats were held at 10:23.

Semifinals
The semifinals were held at 18:11.

Final
The final was held at 18:09.