The following were the results of the finals only of each of the Women's 100 metre butterfly events in each of the classifications. Further details of each event, including where appropriate heats and semi finals results, are available on that event's dedicated page.
The S13 category is for swimmers who have minor visual impairment and have high visual acuity. They are required to wear blackened goggles to compete. They may wish to use a tapper.
The final in this classification took place on 25 August 2021: