Swimming at the 2011 Pan American Games – Women's 4 × 100 metre medley relay

Women's 4 × 100 metre medley relay at the XVI Pan American Games
Venue	Scotiabank Aquatics Center
Date	October 21 (preliminaries and finals)
Winning score	4:01.00
Medalists
Rachel Bootsma, Annie Chandler, Claire Donahue, Amanda Kendall, Elizabeth Pelton, Ashley Wanland, Elaine Breeden, Erika Erndl   United States   Ashley McGregor, Gabrielle Soucisse, Erin Miller, Jennifer Beckberger, Brenna MacLean, Kierra Smith, Samantha Corea, Caroline Lapierre   Canada   Fabíola Molina, Tatiane Sakemi, Daynara de Paula, Tatiana Lemos   Brazil
«2007 2015»

The Women's 4×100 Medley Relay Swimming event at the XVI Pan American Games was swum on 21 October 2011 in Guadalajara, Mexico.

The defending champion in the event was the United States.

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

Key: q= qualified for finals; GR= Games Record; NR= national record.

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