Swimming at the 2019 World Aquatics Championships – 4 × 100 metre mixed medley relay
The 4 × 100 metre mixed medley relay competition at the 2019 World Championships was on 24 July 2019.
Records
Prior to the competition, the existing world and championship records were as follows.Results
Heats
The heats were held on 24 July at 11:29.Final
The final was held on 24 July at 21:50.| Rank | Lane | Nation | Swimmers | Time | Notes |
| 5 | Mitch Larkin Matthew Wilson Emma McKeon Cate Campbell | 3:39.08 | |||
| 4 | Ryan Murphy Lilly King Caeleb Dressel Simone Manuel | 3:39.10 | |||
| 6 | Georgia Davies Adam Peaty James Guy Freya Anderson | 3:40.68 | |||
| 4 | 3 | Evgeny Rylov Kirill Prigoda Svetlana Chimrova Maria Kameneva | 3:40.78 | NR | |
| 5 | 2 | Kylie Masse Richard Funk Margaret MacNeil Yuri Kisil | 3:43.06 | ||
| 6 | 7 | Simone Sabbioni Fabio Scozzoli Elena Di Liddo Federica Pellegrini | 3:43.27 | NR | |
| 7 | 8 | Laura Riedemann Fabian Schwingenschlögl Marius Kusch Jessica Steiger | 3:45.07 | ||
| 1 | Kira Toussaint Arno Kamminga Mathys Goosen Femke Heemskerk | DSQ |