2018 FINA World Swimming Championships (25 m) – Mixed 4 × 50 metre medley relay
The men's 4 × 50 metre medley relay competition of the 2018 FINA World Swimming Championships was held on 13 December 2018.
Records
Prior to the competition, the existing world and championship records were as follows.| Name | Nation | Time | Location | Date | |
| World record | Eugene Godsoe Kevin Cordes Claire Donahue Simone Manuel | 1:37.17 | Glasgow | 21 December 2013 | |
| Championship record | Tom Shields Lilly King Kelsi Worrell Michael Chadwick | 1:37.22 | Windsor, Canada | 8 December 2016 |
The following records were established during the competition:
| Date | Event | Name | Nation | Time | Record |
| 13 December | Final | Olivia Smoliga Michael Andrew Kelsi Dahlia Caeleb Dressel | 1:36.40 | , CR |
Results
Heats
The heats were started at 11:25.| Rank | Heat | Lane | Nation | Swimmers | Time | Notes |
| 1 | 5 | 5 | Ryan Murphy Katie Meili Kendyl Stewart Michael Chadwick | 1:37.33 | Q | |
| 2 | 1 | 2 | Christian Diener Fabian Schwingenschlögl Aliena Schmidtke Jessica Steiger | 1:38.39 | Q | |
| 3 | 5 | 3 | Mitch Larkin Grayson Bell Holly Barratt Emily Seebohm | 1:38.71 | Q | |
| 4 | 3 | 5 | Simone Sabbioni Fabio Scozzoli Elena Di Liddo Federica Pellegrini | 1:38.75 | Q | |
| 5 | 4 | 5 | Evgeny Rylov Oleg Kostin Arina Surkova Rozaliya Nasretdinova | 1:38.85 | Q | |
| 6 | 4 | 3 | Miyuki Takemura Masaki Niiyama Takaya Yasue Aya Sato | 1:39.00 | Q | |
| 7 | 2 | 6 | Mimosa Jallow Jenna Laukkanen Riku Pöytäkivi Ari-Pekka Liukkonen | 1:39.02 | Q | |
| 7 | 5 | 4 | Jesse Puts Ties Elzerman Maaike de Waard Kim Busch | 1:39.02 | Q | |
| 9 | 4 | 8 | Etiene Medeiros João Gomes Júnior Nicholas Santos Larissa Oliveira | 1:39.24 | R | |
| 10 | 4 | 4 | Viktar Staselovich Ilya Shymanovich Anastasiya Shkurdai Nastassia Karakouskaya | 1:39.47 | R | |
| 11 | 3 | 4 | Wang Peng Wang Lizhuo Zhang Yufei Wu Yue | 1:40.10 | ||
| 12 | 5 | 6 | İskender Başlakov Hüseyin Emre Sakçı Aleyna Özkan Selen Özbilen | 1:40.51 | ||
| 13 | 2 | 5 | Caroline Pilhatsch Christopher Rothbauer Sascha Subarsky Cornelia Pammer | 1:41.91 | ||
| 14 | 4 | 9 | Markus Lie Tomoe Zenimoto Hvas Emilie Løvberg Susann Bjørnsen | 1:42.17 | ||
| 15 | 3 | 3 | Stephanie Au Kenneth To Nicholas Lim Sze Hang Yu | 1:42.89 | ||
| 16 | 4 | 6 | Chuang Mu-lun Wu Chun-feng Huang Mei-chien Lin Pei-wun | 1:43.07 | ||
| 17 | 2 | 7 | Ingrid Wilm Sophie Angus Alexandre Perreault Oleksandr Loginov | 1:43.15 | ||
| 18 | 3 | 8 | Gabriela Georgieva Lyubomir Epitropov Antani Ivanov Diana Petkova | 1:43.57 | ||
| 19 | 4 | 0 | Karolina Hájková Marek Botík Ádám Halás Barbora Mikuskova | 1:43.81 | ||
| 20 | 1 | 6 | Andrew Jeffcoat Ciara Smith Wilrich Coetzee Rebecca Moynihan | 1:44.62 | ||
| 21 | 2 | 2 | Ģirts Feldbergs Daniils Bobrovs Ieva Maļuka Gabriela Ņikitina | 1:46.62 | ||
| 22 | 2 | 1 | Lee Ju-ho Kang Ji-seok Park Ye-rin Ko Miso | 1:48.58 | ||
| 23 | 1 | 5 | Tatiana Salcuțan Tatiana Chișca Nichita Bortnicov Dan Siminel | 1:49.46 | ||
| 24 | 1 | 1 | Nimia Murua Édgar Crespo Isaac Beitia Lasso María Castillo | 1:49.61 | ||
| 25 | 1 | 3 | Mónica Ramírez Patrick Pelegrina Cuén Bernat Lomero Nàdia Tudó Cubells | 1:49.90 | ||
| 26 | 5 | 7 | Bryan Alvaréz Arnoldo Herrera Daniela Alfaro Beatriz Padrón | 1:50.03 | ||
| 27 | 5 | 8 | Francesca Falzon Young Michael Stafrace Mya Azzopardi Matt Galea | 1:51.00 | ||
| 28 | 5 | 2 | Therese Soukup Samuele Rossi Felicity Passon Dean Hoffman | 1:51.71 | ||
| 29 | 4 | 7 | Igor Mogne Ludovico Corsini Jannat Bique Alicia Mateus | 1:52.20 | ||
| 30 | 2 | 8 | Imara-Bella Thorpe Rebecca Kamau Ridhwan Mohamed Danilo Rosafio | 1:52.51 | ||
| 31 | 3 | 9 | Bradley Vincent Elodie Poo-cheong Mathieu Marquet Camille Koenig | 1:52.89 | ||
| 32 | 4 | 2 | Ani Poghosyan Varsenik Manucharyan Artur Barseghyan Vladimir Mamikonyan | 1:53.39 | ||
| 33 | 5 | 1 | Lin Sizhuang Cheang Weng Lam Chao Man Hou Tan Chi Yan | 1:53.45 | ||
| 34 | 3 | 1 | Enkhkhuslen Batbayar Delgerkhuu Myagmar Zandanbal Gunsennorov Enkhzul Khuyagbaatar | 1:54.02 | ||
| 35 | 4 | 1 | Eisner Barberena Kener Torrez Karla Abarca María Hernández | 1:54.41 | ||
| 36 | 3 | 2 | Ada Thioune Amadou Ndiaye Abdoul Niane Jeanne Boutbien | 1:56.95 | NR | |
| 37 | 2 | 9 | Heriniavo Rasolonjatovo Samantha Rakotovelo Lalanomena Andrianirina Tiana Rabarijaona | 1:59.05 | ||
| 38 | 2 | 3 | Noah Mascoll-Gomes Bianca Mitchell Stefano Mitchell Olivia Fuller | 1:59.15 | ||
| 39 | 5 | 0 | Finau Ohuafi Amini Fonua Charissa Panuve Noelani Day | 1:59.74 | ||
| 40 | 1 | 4 | Amanda Joy Poppe Benjamin Schulte Mineri Kurotori Gomez James Hendrix | 2:00.76 | ||
| 41 | 5 | 9 | Josh Tarere Leonard Kalate Georgia-Leigh Vele Rehema Kalate | 2:02.78 | ||
| 42 | 3 | 0 | Alex Maclaren Luke Haywood Jack Parlee Arleigha Hall | 2:05.12 | ||
| 43 | 2 | 0 | Olimjon Ishanov Karina Klimyk Fakhriddin Madkamov Anastasiya Tyurina | 2:07.93 | ||
| 44 | 2 | 4 | Nafissath Radji Gildas Koumondji Jefferson Kpanou Laraïba Seibou | 2:13.02 | ||
| 45 | 3 | 7 | Aishath Sausan Mubal Azzam Ibrahim Ali Imaan Hamna Ahmed | 2:14.46 | ||
| 1 | 7 | Jeserik Pinto Carlos Claverie Isabella Paez Cristian Quintero | ||||
| 3 | 6 | Mohammed Bedour Amro Al-Wir Lara Aklouk Leedia Alsafadi |
Final
The final was held at 20:50.| Rank | Lane | Nation | Swimmers | Time | Notes |
| 4 | Olivia Smoliga Michael Andrew Kelsi Dahlia Caeleb Dressel | 1:36.40 | |||
| 8 | Jesse Puts Ties Elzerman Ranomi Kromowidjojo Femke Heemskerk | 1:37.05 | ER | ||
| 2 | Kliment Kolesnikov Oleg Kostin Rozaliya Nasretdinova Maria Kameneva | 1:37.33 | NR | ||
| 4 | 7 | Miyuki Takemura Yasuhiro Koseki Takeshi Kawamoto Aya Sato | 1:37.67 | ||
| 5 | 6 | Simone Sabbioni Fabio Scozzoli Elena Di Liddo Federica Pellegrini | 1:38.08 | ||
| 6 | 5 | Christian Diener Fabian Schwingenschlögl Aliena Schmidtke Jessica Steiger | 1:38.35 | ||
| 7 | 3 | Mitch Larkin Grayson Bell Holly Barratt Emily Seebohm | 1:38.69 | ||
| 8 | 1 | Mimosa Jallow Jenna Laukkanen Riku Pöytäkivi Ari-Pekka Liukkonen | 1:39.38 |