Swimming at the 2011 Pan American Games – Women's 100 metre butterfly

The women's 100 metre butterfly competition of the swimming events at the 2011 Pan American Games took place on October 15 at the Scotiabank Aquatics Center in the municipality of Zapopan, near Guadalajara, Mexico. The defending Pan American Games champion was Kathleen Hersey of the United States. The race consisted of two lengths of the pool, both lengths being in the butterfly stroke.

Swimming at the 2011 Pan American Games – Women's 100 metre butterfly

The women's 100 metre butterfly competition of the swimming events at the 2011 Pan American Games took place on October 15 at the Scotiabank Aquatics Center in the municipality of Zapopan, near Guadalajara, Mexico. The defending Pan American Games champion was Kathleen Hersey of the United States. The race consisted of two lengths of the pool, both lengths being in the butterfly stroke.