# Swimming at the 2019 Pan American Games – Mixed 4 × 100 metre medley relay

The mixed 4 × 100 metre medley relay competition of the swimming events at the 2019 Pan American Games are scheduled to be held August 8, 2019 at the Villa Deportiva Nacional Videna cluster.
The United States team originally won the gold medal, however it was disqualified for two alleged breaststroke kicks off the turn. USA Swimming voiced their disagreement with the decision, but they were not allowed to appeal.

## Records

Prior to this competition, the existing World Record was as follows:
| World record | United States (USA) Matt Grevers (52.32) Lilly King (1:04.15) Caeleb Dressel (49.92) Simone Manuel (52.17) | 3:38.56 | Budapest, Hungary | July 26, 2017 |

## Results

| KEY: | q | Fastest non-qualifiers | Q | Qualified | GR | Games record | NR | National record | PB | Personal best | SB | Seasonal best |

### Heats

The first round was held on August 8.
| Rank | Heat | Lane | Nation | Swimmers | Time | Notes |
| 1 | 2 | 4 | United States | Isabelle Stadden (59.69) Kevin Cordes (1:00.59) Matthew Josa (52.30) Meaghan Raab (55.69) | 3:48.27 | Q, GR |
| 2 | 1 | 6 | Brazil | Leonardo de Deus (55.17) Jhennifer Conceição (1:08.27) Vinicius Lanza (52.84) Manuella Lyrio (56.14) | 3:52.42 | Q |
| 3 | 1 | 4 | Canada | Javier Acevedo (55.77) James Dergousoff (1:03.45) Haley Black (59.43) Kyla Leibel (55.62) | 3:54.27 | Q |
| 4 | 1 | 3 | Colombia | Anthony Rincón (56.75) Jorge Murillo (1:01.28) Valentina Becerra (1:01.17) Sirena Rowe (57.26) | 3:56.46 | Q |
| 5 | 2 | 5 | Mexico | Celia Pulido (1:03.31) Esther González (1:11.68) Lorena González Mendoza (1:04.00) José Martínez (51.60) | 4:01.65 | Q |
| 6 | 2 | 6 | Cuba | Armando Barrera (57.50) Julio Calero (1:05.05) Mateo González (55.06) Elisbet Gámez (56.48) | 4:03.03 | Q |
| 7 | 2 | 3 | Argentina | Florencia Perotti (1:05.44) Virginia Bardach (1:13.15) Roberto Strelkov (53.57) Lautaro Rodríguez (50.98) | 4:03.14 | Q |
| 8 | 1 | 5 | Venezuela | Mayerly Escalante Hernandez (1:06.56) Marco Guarente (1:02.20) Bryan Chávez (55.25) Fabiana Pesce (59.17) | 4:03.18 | Q |
| 9 | 1 | 2 | Panama | Carolina Cermelli (1:05.39) Édgar Crespo (1:04.63) Bernhard Christianson (56.15) Ireyra Tamayo (59.94) | 4:06.11 | |
| 10 | 2 | 2 | Peru | McKenna DeBever (1:05.13) Paula Tamashiro (1:12.35) Javier Tang Juy (55.91) Miguel Zavaleta Castaneda (53.07) | 4:06.46 | |

### Final

The final round was also held on August 8.
| Rank | Lane | Nation | Swimmers | Time | Notes |
| | 5 | Brazil | Guilherme Guido (54.68) João Gomes Júnior (59.32) Giovanna Diamante (59.33) Larissa Oliveira (55.28) | 3:48.61 | |
| | 3 | Canada | Javier Acevedo (55.03) James Dergousoff (1:01.71) Danielle Hanus 58.71) Alexia Zevnik (54.52) | 3:49.97 | |
| | 1 | Argentina | Andrea Berrino (1:02.61) Julia Sebastián (1:07.55) Santiago Grassi (51.65) Federico Grabich (48.72) | 3:50.53 | NR |
| 4 | 2 | Mexico | Celia Pulido (1:03.42) Melissa Rodríguez (1:07.92) Long Gutiérrez (53.29) Jorge Iga (49.22) | 3:53.85 | |
| 5 | 6 | Colombia | Omar Pinzón (56.00) Jorge Murillo (1:01.06) Valentina Becerra (1:00.72) Sirena Rowe (57.44) | 3:55.22 | |
| 6 | 8 | Venezuela | Carla González ( 1:05.35) Marco Guarente (1:02.44) Isabella Páez (1:01.01) Cristian Quintero (49.30) | 3:58.10 | |
| 7 | 7 | Cuba | Armando Barrera (57.39) Julio Calero (1:03.74) Lorena González Mendoza (1:03.25) Elisbet Gámez (56.42) | 4:00.80 | |
| | 4 | United States | Phoebe Bacon (59.56) Cody Miller Tom Shields Margo Geer | DSQ | |