Swimming at the 2019 Pan American Games – Women's 400 metre freestyle

The women's 400 metre freestyle competition of the swimming events at the 2019 Pan American Games was held on 6 August 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 6.

Final B
The B final was also held on August 6.

Final A
The A final was also held on August 6.