2018 Pan Pacific Swimming Championships – Women's 100 metre butterfly

The women's 100 metre butterfly competition at the 2018 Pan Pacific Swimming Championships took place on August 11 at the Tokyo Tatsumi International Swimming Center. The defending champion was Alicia Coutts of Australia.

2018 Pan Pacific Swimming Championships – Women's 100 metre butterfly

The women's 100 metre butterfly competition at the 2018 Pan Pacific Swimming Championships took place on August 11 at the Tokyo Tatsumi International Swimming Center. The defending champion was Alicia Coutts of Australia.