Swimming at the 2019 Pan American Games – Women's 4 × 100 metre medley relay

The women's 4 × 100 metre medley relay competition of the swimming events at the 2019 Pan American Games are scheduled to be held August 10th, 2019 at the Villa Deportiva Nacional Videna cluster.

Records
Prior to this competition, the existing world and Pan American Games records were as follows:

Heats
The first round was held on August 10.

Final
The final round was also on August 10.