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

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.

## Records

Prior to this competition, the existing world and Pan American Games records were as follows:
| World record | United States (USA) Missy Franklin (58.50) Rebecca Soni (1:04.82) Dana Vollmer (55.48) Allison Schmitt (53.25) | 3:52.05 | London, United Kingdom | August 4, 2012 |
| Pan American Games record | United States (USA) Rachel Bootsma (1:00.46) Ann Chandler (1:07.59) Claire Donahue (59.03) Amanda Kendall (53.92) | 4:01.00 | Guadalajara, Mexico | October 21, 2011 |
The following new records were set during this competition.
| Date | Event | Nation | Time | Record |
| 18 July | Heat 1 | United States | 3:57.35 | GR |
| 18 July | Final | United States | 3:56.53 | GR |

## Schedule

All times are Eastern Time Zone (UTC-4).
| Date | Time | Round |
| July 18, 2015 | 11:29 | Heats |
| July 18, 2015 | 20:29 | Final |

## Results
### Heats

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.
| Rank | Heat | Lane | Name | Nationality | Time | Notes |
| 1 | 1 | 4 | Natalie Coughlin (59.20 GR) Katie Meili (1:06.57) Kelsi Worrell (57.63) Allison Schmitt (53.95) | United States | 3:57.35 | Q, GR |
| 2 | 1 | 5 | Dominique Bouchard (1:01.18) Tera van Beilen (1:09.04) Noemie Thomas (58.30) Sandrine Mainville (53.76) | Canada | 4:02.28 | Q |
| 3 | 1 | 3 | Natalia de Luccas (1:03.07) Beatriz Travalon (1:10.08) Daynara de Paula (1:01.09) Larissa Oliveira (56.82) | Brazil | 4:11.06 | Q |
| 4 | 1 | 1 | Estela Davis (1:04.09) Byanca Rodriguez (1:09.62) Diana Luna (1:01.73) Liliana Ibáñez (57.19) | Mexico | 4:12.63 | Q |
| 5 | 1 | 6 | Andrea Berrino (1:03.50) Macarena Ceballos (1:11.50) Belen Diaz (1:03.86) Aixa Triay (56.80) | Argentina | 4:15.66 | Q |
| 6 | 1 | 2 | Jeserik Pinto (1:03.99) Mercedes Toledo (1:13.14) Isabella Paez (1:01.86) Andrea Garrido (1:01.23) | Venezuela | 4:20.22 | Q |
| 7 | 1 | 7 | Danielle Boothe (1:06.78) Breanna Roman (1:13.60) Trudian Patrick (1:04.49) Alia Atkinson (59.31) | Jamaica | 4:24.18 | Q |
| 8 | 1 | 8 | Andrea Cedrón (1:09.10) Paula Tamashiro (1:16.74) McKenna DeBever (1:07.97) Jessica Cattaneo (58.81) | Peru | 4:32.62 | Q |

### Final

The final was held on July 18.
| Rank | Lane | Name | Nationality | Time | Notes |
| | 4 | Natalie Coughlin (59.05 GR) Katie Meili (1:06.06) Kelsi Worrell (57.34) Allison Schmitt (54.08) | United States | 3:56.53 | GR |
| | 5 | Dominique Bouchard (1:00.85) Rachel Nicol (1:06.78) Noemie Thomas (57.58) Chantal van Landeghem (53.30) | Canada | 3:58.51 | |
| | 3 | Etiene Medeiros (1:00.65) Jhennifer Conceição (1:08.50) Daynara de Paula (58.41) Larissa Oliveira (54.96) | Brazil | 4:02.52 | |
| 4 | 2 | Andrea Berrino (1:02.09) Macarena Ceballos (1:09.73) Belen Diaz (1:00.93) Aixa Triay (55.49) | Argentina | 4:08.24 | NR |
| 5 | 6 | Maria González (1:01.37) Byanca Rodriguez (1:09.09) Ana Sofia Revilak (1:01.13) Liliana Ibáñez (56.67) | Mexico | 4:08.26 | NR |
| 6 | 7 | Carla González (1:04.54) Mercedes Toledo (1:11.81) Isabella Paez (1:01.18) Arlene Semeco (56.35) | Venezuela | 4:13.88 | NR |
| 7 | 1 | Danielle Boothe (1:05.89) Alia Atkinson (1:07.05) Trudian Patrick (1:04.30) Breanna Roman (57.34) | Jamaica | 4:14.58 | |
| 8 | 8 | McKenna DeBever (1:04.92) Paula Tamashiro (1:13.61) Andrea Cedrón (1:05.81) Jessica Cattaneo (58.15) | Peru | 4:22.49 | NR |