Swimming at the 2007 Pan American Games – Women's 4 × 100 metre medley relay
The Women's 4x100m Medley Relay at the 2007 Pan American Games took place at the Maria Lenk Aquatic Park in Rio de Janeiro, Brazil, with the final being swum on July 22.
Medalists
Results
Finals
Preliminaries
The heats was held on July 20.| Place | Country | Swimmers | Time | Note |
| 1 | Caitilin Meredith Jillian Tyler Stephanie Horner Elizabeth Collins | 4:12.22 | Q | |
| 2 | Brielle White Michelle McKeehan Kathleen Hersey Maritza Correia | 4:12.62 | Q | |
| 3 | Alana Dillette Alicia Lightbourne Arianna Vanderpool-Wallace Nikia Deveaux | 4:23.70 | Q | |
| 4 | Fernanda Alvarenga Mariana Katsuno Gabriella Silva Flávia Delaroli | 4:25.24 | Q | |
| 5 | Jeserick Pinto Gloria González Andreina Pinto Ximena Vilar | 4:32.69 | Q | |
| 6 | Fernanda González Adriana Marmolejo Alma Arciniega Sandra Alanis | 4:36.87 | Q | |
| 7 | Slavica Pavic Valeria Silva María Torres Massie Carrillo | 4:42.86 | Q | |
| 8 | Laura Páz Karen Poujol Sharon Fajardo Laura Leiva | 4:51.74 | Q | |
| 9 | - - - - | DNS |