| - from - nations|| Pan Am Pool|
| August 2 (preliminaries and finals)|
Pan Am Pool, Winnipeg, Canada
The women's 100 metre freestyle competition of the swimming events at the 1999 Pan American Games took place on 2 August at the Pan Am Pool. The last Pan American Games champion was Angel Martino of US.
This race consisted of two lengths of the pool, both lengths being in freestyle.
Swimming at the 1999 Pan American Games – Women's 100 metre freestyle Wikipedia
All times are in minutes and seconds.
The first round was held on August 2.
The B final was held on August 2.
The A final was held on August 2.