Swimming at the 1991 Pan American Games – Women's 100 metre freestyle

The women's 100 metre freestyle competition of the swimming events at the 1991 Pan American Games took place on 12 August. The last Pan American Games champion was Silvia Poll of Costa Rica.

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

Results
All times are in minutes and seconds.

Final
The final was held on August 12.