Swimming at the 2019 Pan American Games – Mixed 4 × 100 metre freestyle relay

The mixed 4 × 100 metre freestyle relay competition of the swimming events at the 2019 Pan American Games were held on August 7, 2019 at the Villa Deportiva Nacional Videna cluster.

Records
Prior to this competition, the existing World Record was as follows: The following games record was established during the competition:

Heats
The first round was held on August 7.

Final
The final round was also held on August 7.