| 42 from 8 nations|| 3:36.80|
| July 14 (preliminaries and finals)|
Toronto Pan Am Sports Centre, Toronto, Canada
Toronto Pan Am Sports Centre
The women's 4 × 100 metre freestyle relay competition of the swimming events at the 2015 Pan American Games took place on July 14 at the CIBC Pan Am/Parapan Am Aquatics Centre and Field House in Toronto, Canada. The defending Pan American Games champion is the United States.
This race consisted of eight lengths of the pool. Each of the four swimmers completed two lengths of the pool. The first swimmer had to touch the wall before the second could leave the starting block.
Swimming at the 2015 Pan American Games – Women's 4 × 100 metre freestyle relay Wikipedia
Prior to this competition, the existing world and Pan American Games records were as follows:
The following new records were set during this competition.
All times are Eastern Time Zone (UTC-4).
The first round was held on July 14. As only eight teams had entered, the heats served as a ranking round with all eight teams advancing to the final.
The final was held on July 14.