# Swimming at the 2019 World Aquatics Championships – 4 × 100 metre mixed freestyle relay

The 4 × 100 metre mixed freestyle relay competition at the 2019 World Championships was held on 27 July 2019. The event was won by the United States team in a world record time of 3 minutes, 19.40 seconds.

## Records

Prior to the competition, the existing world and championship records were as follows.
| World record | United States | 3:19.60 | Budapest, Hungary | 29 July 2017 |
| Competition record | United States | 3:19.60 | Budapest, Hungary | 29 July 2017 |
The following new records were set during this competition.
| Date | Event | Nationality | Time | Record |
| 27 July | Final | United States | 3:19.40 | WR |

## Results
### Heats

The heats were held on at 10:53.
| Rank | Heat | Lane | Nation | Swimmers | Time | Notes |
| 1 | 3 | 0 | United States | Blake Pieroni (48.15) Nathan Adrian (47.67) Katie McLaughlin (53.96) Abbey Weitzeil (52.92) | 3:22.70 | Q |
| 2 | 4 | 2 | Australia | Cameron McEvoy (48.69) Alexander Graham (48.40) Brianna Throssell (53.46) Madison Wilson (53.22) | 3:23.77 | Q |
| 3 | 3 | 1 | Canada | Markus Thormeyer (48.98) Yuri Kisil (48.25) Kayla Sanchez (53.10) Maggie MacNeil (53.76) | 3:24.09 | Q |
| 4 | 4 | 4 | France | Clément Mignon (48.33) Maxime Grousset (48.61) Charlotte Bonnet (53.39) Béryl Gastaldello (53.94) | 3:24.27 | Q |
| 5 | 3 | 5 | Italy | Manuel Frigo (48.75) Alessandro Miressi (48.39) Ilaria Bianchi (54.80) Federica Pellegrini (53.12) | 3:25.06 | Q |
| 6 | 4 | 5 | Russia | Mikhail Vekovishchev (48.68) Ivan Girev (48.72) Daria S. Ustinova (53.87) Veronika Andrusenko (54.11) | 3:25.38 | Q |
| 7 | 3 | 2 | Japan | Katsuhiro Matsumoto (48.78) Katsumi Nakamura (48.21) Tomomi Aoki (54.52) Aya Sato (53.90) | 3:25.41 | Q |
| 8 | 3 | 4 | Netherlands | Kyle Stolk (49.17) Jesse Puts (48.56) Kira Toussaint (54.99) Maud van der Meer (54.57) | 3:27.29 | Q |
| 9 | 4 | 3 | Germany | Josha Salchow (49.50) Christoph Fildebrandt (48.60) Isabel Marie Gose (55.16) Julia Mrozinski (54.11) | 3:27.37 | |
| 10 | 3 | 3 | Poland | Jakub Kraska (49.24) Jan Hołub (49.37) Katarzyna Wilk (53.93) Aleksandra Polańska (55.09) | 3:27.63 | NR |
| 11 | 2 | 1 | Switzerland | Roman Mityukov (50.00) Antonio Djakovic (49.12) Maria Ugolkova (54.14) Noémi Girardet (55.88) | 3:29.14 | NR |
| 12 | 4 | 8 | Singapore | Darren Chua Yi Shou (49.97) Jonathan Tan Eu Jin (49.65) Cherlyn Yeoh (55.13) Quah Jing Wen (55.51) | 3:30.26 | |
| 13 | 4 | 0 | South Korea | Yang Jae-hoon (49.60) Lee Kun-a (55.83) Jeong So-eun (55.32) Park Seon-kwan (50.45) | 3:31.20 | NR |
| 14 | 4 | 7 | Turkey | Yalım Acımış (50.60) Hüseyin Emre Sakçı (48.92) Selen Özbilen (56.05) Viktoriya Zeynep Güneş (55.81) | 3:31.38 | |
| 15 | 3 | 6 | China | Yu Hexin (50.53) Cao Jiwen (48.82) Wang Jingzhuo (55.26) Wu Qingfeng (57.11) | 3:31.72 | |
| 16 | 3 | 8 | Hong Kong | Nicholas Lim (51.99) Ian Ho Yentou (49.53) Tam Hoi Lam (56.24) Camille Cheng (54.79) | 3:32.55 | NR |
| 17 | 3 | 7 | South Africa | Christopher Reid (50.81) Ryan Coetzee (50.64) Emma Chelius (55.14) Tayla Lovemore (56.30) | 3:32.89 | |
| 18 | 1 | 6 | Luxembourg | Julien Henx (51.30) Raphaël Stacchiotti (49.82) Julie Meynen (55.22) Monique Olivier (57.21) | 3:33.55 | NR |
| 19 | 1 | 8 | Philippines | Luke Gebbie (50.01) Nicole Oliva (56.64) James Deiparine (54.35) Remedy Rule (56.14) | 3:37.14 | NR |
| 20 | 4 | 1 | Latvia | Ģirts Feldbergs (51.91) Daniils Bobrovs (52.45) Kristina Steina (56.52) Ieva Maļuka (56.78) | 3:37.66 | NR |
| 21 | 2 | 8 | Chinese Taipei | Wang Yu-lian (50.71) An Ting-yao (50.72) Huang Mei-chien (57.58) Lin Pei-wun (1:02.09) | 3:41.10 | |
| 22 | 1 | 5 | Armenia | Artur Barseghyan (51.32) Vahan Mkhitaryan (52.66) Ani Poghosyan (59.04) Varsenik Manucharyan (1:01.05) | 3:44.07 | NR |
| 23 | 3 | 9 | Senegal | Steven Aimable (51.72) Abdoul Niane (51.55) Sophia Diagne (1:01.38) Jeanne Boutbien (59.56) | 3:44.21 | |
| 24 | 2 | 9 | Cayman Islands | Brett Fraser (50.18) Jordan Crooks (51.90) Raya Embury-Brown (1:02.72) Lauren Hew (59.74) | 3:44.54 | |
| 25 | 4 | 9 | Kenya | Issa Mohamed (53.44) Maria Brunlehner (58.88) Emily Muteti (1:00.64) Danilo Rosafio (53.69) | 3:46.65 | NR |
| 26 | 1 | 4 | Seychelles | Felicity Passon (57.06) Simon Bachmann (54.17) Aaliyah Palestrini (1:01.75) Samuele Rossi (55.00) | 3:47.98 | |
| 27 | 1 | 7 | Jordan | Khader Baqlah (49.09) Amro Al-Wir (55.31) Leedia Alsafadi (1:03.54) Talita Baqlah (1:00.41) | 3:48.35 | |
| 28 | 1 | 2 | Mongolia | Delgerkhuu Myagmar (53.68) NR Zandanbal Gunsennorov (55.10) Enkhzul Khuyagbaatar (1:03.61) Enkhkhuslen Batbayar (58.60) | 3:50.99 | |
| 29 | 2 | 4 | Angola | Catarina Sousa (59.11) Daniel Francisco (53.78) Lia Ana Lima (1:03.51) Salvador Gordo (54.69) | 3:51.09 | |
| 30 | 2 | 3 | Papua New Guinea | Samuel Seghers (52.84) Georgia-Leigh Vele (1:02.29) Judith Meauri (1:03.66) Ryan Maskelyne (54.67) | 3:53.46 | |
| 31 | 2 | 5 | Uganda | Atuhaire Ambala (54.99) Selina Katumba (1:04.19) Tendo Mukalazi (56.55) Avice Meya (1:04.36) | 4:00.09 | NR |
| 32 | 2 | 2 | Madagascar | Tiana Rabarijaona (1:00.85) Heriniavo Rasolonjatovo (55.56) Jonathan Raharvel (1:00.17) Idealy Tendrinavalona (1:05.88) | 4:02.46 | |
| 33 | 1 | 3 | Micronesia | Tasi Limtiaco (54.53) Margie Winter (1:07.33) Taeyanna Adams (1:09.81) Kaleo Kihleng (56.30) | 4:07.97 | |
| 34 | 2 | 0 | Tonga | Finau Ohuafi (56.67) Noelani Day (1:06.50) Charissa Panuve (1:08.37) Amini Fonua (56.65) | 4:08.19 | NR |
| 35 | 2 | 7 | Maldives | Ali Imaan (1:01.84) Aishath Sausan (1:11.87) Sajina Aishath (1:13.12) Mubal Azzam Ibrahim (59.08) | 4:25.91 | NR |
| | 4 | 6 | Israel | Tomer Frankel (50.11) Meiron Cheruti Anastasia Gorbenko Andrea Murez | DSQ | DSQ |
| | 1 | 1 | Nigeria | Ifeakachuku Nmor Chinelo Iyadi Abiola Ogunbanwo Yellow Yeiyah | DNS | DNS |
| | 2 | 6 | Panama | | DNS | DNS |

### Final

The final was started at 21.47.
| Rank | Lane | Nation | Swimmers | Time | Notes |
| | 4 | United States | Caeleb Dressel (47.34) Zach Apple (47.34) Mallory Comerford (52.72) Simone Manuel (52.00) | 3:19.40 | WR |
| | 5 | Australia | Kyle Chalmers (47.37) Clyde Lewis (48.18) Emma McKeon (52.06) Bronte Campbell (52.36) | 3:19.97 | OC |
| | 6 | France | Clément Mignon (48.44) Mehdy Metella (47.78) Charlotte Bonnet (52.87) Marie Wattel (53.02) | 3:22.11 | |
| 4 | 3 | Canada | Markus Thormeyer (48.84) Yuri Kisil (48.58) Taylor Ruck (53.12) Penny Oleksiak (52.00) | 3:22.54 | NR |
| 5 | 7 | Russia | Vladislav Grinev (48.42) Vladimir Morozov (47.31) Maria Kameneva (52.95) Daria Ustinova (54.04) | 3:22.72 | NR |
| 6 | 8 | Netherlands | Kyle Stolk (48.97) Jesse Puts (47.84) Femke Heemskerk (52.81) Ranomi Kromowidjojo (53.86) | 3:23.48 | |
| 7 | 1 | Japan | Katsumi Nakamura (48.49) Katsuhiro Matsumoto (47.99) Rika Omoto (54.36) Aya Sato (53.83) | 3:24.67 | AS |
| 8 | 2 | Italy | Manuel Frigo (48.80) Alessandro Miressi (48.27) Ilaria Bianchi (54.81) Federica Pellegrini (53.70) | 3:25.58 | |