Swimming at the 1959 Pan American Games – Women's 100 metre butterfly

The women's 100 metre butterfly competition of the swimming events at the 1959 Pan American Games took place on 2 September (preliminaries) and 4 September (finals). The last Pan American Games champion was Beth Whittall of Canada.

This race consisted of two lengths of the pool, all in butterfly.

Results
All times are in minutes and seconds.

Heats
The first round was held on September 2.

Final
The final was held on September 4.