| - from - nations|
| August 19 (preliminaries and finals)|
The women's 100 metre backstroke competition of the swimming events at the 1983 Pan American Games took place on 19 August. The last Pan American Games champion was Linda Jezek of US.
This race consisted of two lengths of the pool, all in backstroke.
Swimming at the 1983 Pan American Games – Women's 100 metre backstroke Wikipedia
All times are in minutes and seconds.
The final was held on August 19.