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

The women's 100 metre breaststroke competition of the swimming events at the 1991 Pan American Games took place on 16 August. The last Pan American Games champion was Keltie Duggan of Canada.

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

Results
All times are in minutes and seconds.

Final
The final was held on August 16.