Swimming at the 2015 Pan American Games – Women's 4 × 100 metre medley relay

Women's 4 × 100 metre medley relay at the XVII Pan American Games
Venue	CIBC Pan Am/Parapan Am Aquatics Centre and Field House
Dates	July 18 (preliminaries and finals)
Competitors	40 from 8 nations
Winning time	3:56.53
Medalists
Natalie Coughlin, Katie Meili, Kelsi Worrell, Allison Schmitt   United States   Dominique Bouchard, Rachel Nicol, Noemie Thomas, Chantal van Landeghem, Tera van Beilen, Sandrine Mainville   Canada   Etiene Medeiros, Jhennifer Conceição, Daynara de Paula, Larissa Oliveira, Natalia de Luccas, Beatriz Travalon   Brazil
«2011 2019»

The women's 4 × 100 metre medley relay competition of the swimming events at the 2015 Pan American Games took place on July 18 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 order of swimming styles is: Backstroke, Breaststroke, Butterfly and Freestyle. The first swimmer had to touch the wall before the second could leave the starting block.

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 18. 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 18.

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