Swimming at the 1971 Pan American Games – Women's 4 × 100 metre medley relay

The women's 4 × 100 meter medley relay competition of the swimming events at the 1971 Pan American Games took place on 6 August. The defending Pan American Games champion is the United States.

It was the first time that the U.S. lost the gold in a relay event, at the Pan American Games.

Results
All times are in minutes and seconds.

Final
The final was held on August 6.