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

The women's 100 metre freestyle competition of the swimming events at the 1959 Pan American Games took place on 1 September (preliminaries) and 4 September (finals). The last Pan American Games champion was Helen Stewart of Canada.

This race consisted of two lengths of the pool, both lengths being in freestyle.

Results
All times are in minutes and seconds.

Heats
The first round was held on September 1.

Final
The final was held on September 4.