# Swimming at the 2023 World Aquatics Championships – Men's 4 × 100 metre medley relay

The men's 4 × 100 metre medley relay competition at the 2023 World Aquatics Championships was held on 30 July 2023.

## Records

Prior to the competition, the existing world and championship records were as follows:
| World record | United States Ryan Murphy (52.31) Michael Andrew (58.49) Caeleb Dressel (49.03) Zach Apple (46.95) | 3:26.78 | Tokyo, Japan | 1 August 2021 |
| Competition record | United States Aaron Peirsol (52.19) Eric Shanteau (58.57) Michael Phelps (49.72) David Walters (46.80) | 3:27.28 | Rome, Italy | 2 August 2009 |
The following new records were set during this competition.
| Date | Event | Nation | Swimmers | Time | Record |
| 30 July | Final | United States | Ryan Murphy (52.04) Nic Fink (58.03) Dare Rose (50.13) Jack Alexy (47.00) | 3:27.20 | CR |

## Results
### Heats

The heats were held at 10:58.
| Rank | Heat | Lane | Nation | Swimmers | Time | Notes |
| 1 | 2 | 4 | United States | Hunter Armstrong (52.45) Josh Matheny (59.12) Thomas Heilman (51.61) Matt King (47.33) | 3:30.51 | Q |
| 2 | 3 | 3 | France | Mewen Tomac (53.40) Léon Marchand (59.57) Maxime Grousset (50.47) Hadrien Salvan (48.17) | 3:31.61 | Q |
| 3 | 2 | 5 | Australia | Bradley Woodward (53.64) Samuel Williamson (59.60) Matthew Temple (50.82) Kai Taylor (47.69) | 3:31.75 | Q |
| 4 | 2 | 6 | China | Xu Jiayu (53.16) Yan Zibei (59.04) Sun Jiajun (52.35) Wang Haoyu (47.34) | 3:31.89 | Q |
| 5 | 2 | 3 | Germany | Ole Braunschweig (53.96) Lucas Matzerath (58.87) Jan Eric Friese (51.29) Josha Salchow (47.99) | 3:32.11 | Q |
| 5 | 2 | 7 | Canada | Javier Acevedo (54.35) James Dergousoff (1:00.10) Joshua Liendo (50.02) Ruslan Gaziev (47.64) | 3:32.11 | Q |
| 7 | 2 | 2 | Japan | Ryosuke Irie (54.00) Ippei Watanabe (59.58) Naoki Mizunuma (51.34) Katsuhiro Matsumoto (47.44) | 3:32.36 | Q |
| 8 | 3 | 5 | Great Britain | Oliver Morgan (53.74) James Wilby (59.81) James Guy (51.36) Tom Dean (48.36) | 3:33.27 | Q |
| 9 | 3 | 4 | Italy | Thomas Ceccon (53.67) Nicolò Martinenghi (59.65) Piero Codia (51.81) Manuel Frigo (48.41) | 3:33.54 | |
| 10 | 2 | 1 | South Korea | Lee Ju-ho (54.51) Choi Dong-yeol (59.45) Kim Young-beom (52.06) Hwang Sun-woo (48.23) | 3:34.25 | NR |
| 11 | 3 | 6 | Austria | Bernhard Reitshammer (54.72) Valentin Bayer (59.68) Simon Bucher (51.87) Heiko Gigler (48.31) | 3:34.58 | |
| 12 | 3 | 2 | Poland | Ksawery Masiuk (54.55) Dawid Wiekiera (1:00.53) Adrian Jaskiewicz (51.84) Kamil Sieradzki (47.74) | 3:34.66 | |
| 13 | 1 | 4 | Ireland | Conor Ferguson (54.14) Darragh Greene (1:00.03) Max McCusker (52.27) Shane Ryan (48.59) | 3:35.03 | |
| 14 | 3 | 1 | Spain | Hugo González (53.64) Carles Coll (1:00.45) Mario Mollà (51.78) César Castro (49.26) | 3:35.13 | |
| 15 | 1 | 5 | Switzerland | Roman Mityukov (54.47) Jérémy Desplanches (1:00.96) Noè Ponti (51.33) Antonio Djakovic (48.70) | 3:35.46 | NR |
| 16 | 1 | 6 | Portugal | João Costa (54.13) Gabriel Lopes (1:00.57) Diogo Ribeiro (51.76) Miguel Nascimento (49.17) | 3:35.63 | NR |
| 17 | 2 | 9 | Israel | Michael Laitarovsky (54.72) Ron Polonsky (1:00.36) Gal Cohen Groumi (51.80) Tomer Frankel (49.59) | 3:36.47 | |
| 18 | 1 | 3 | Mexico | Diego Camacho (56.03) Miguel de Lara (1:00.87) Jorge Iga (52.65) Andres Dupont (47.70) | 3:37.25 | NR |
| 19 | 2 | 0 | Sweden | Björn Seeliger (56.38) Erik Persson (1:00.26) Oskar Hoff (53.96) Robin Hanson (48.97) | 3:39.57 | |
| 20 | 3 | 8 | Greece | Apostolos Siskos (56.65) Arkadios Aspougalis (1:01.64) Andreas Vazaios (53.75) Kristian Gkolomeev (49.98) | 3:42.02 | |
| 21 | 3 | 9 | Thailand | Tonnam Kanteemool (58.20) Dulyawat Kaewsriyong (1:07.13) Navaphat Wongcharoen (54.90) Ratthawit Thammananthachote (52.30) | 3:52.53 | |
| 22 | 3 | 0 | Vietnam | Mai Trần Tuấn Anh (1:00.62) Phạm Thanh Bảo (1:04.92) Hồ Nguyễn Duy Khoa (58.64) Luong Jérémie Loïc Nino (52.00) | 3:56.18 | |
| | 1 | 2 | New Zealand | Andrew Jeffcoat (54.37) Joshua Gilbert (1:00.91) Lewis Clareburt (52.47) Cameron Gray | DSQ | DSQ |
| | 3 | 7 | Brazil | Guilherme Basseto (54.18) João Gomes Júnior (1:00.08) Kayky Mota Marcelo Chierighini | DSQ | DSQ |
| | 2 | 8 | Singapore | DNS | DNS | DNS |

### Final

The final was held at 21:19.
| Rank | Lane | Nation | Swimmers | Time | Notes |
| | 4 | United States | Ryan Murphy (52.04) Nic Fink (58.03) Dare Rose (50.13) Jack Alexy (47.00) | 3:27.20 | CR |
| | 6 | China | Xu Jiayu (53.39) Qin Haiyang (57.43) Wang Changhao (51.56) Pan Zhanle (46.62) | 3:29.00 | AS |
| | 3 | Australia | Bradley Woodward (53.38) Zac Stubblety-Cook (59.25) Matthew Temple (50.10) Kyle Chalmers (46.89) | 3:29.62 | |
| 4 | 5 | France | Yohann Ndoye-Brouard (53.21) Léon Marchand (59.00) Maxime Grousset (49.27) Hadrien Salvan (48.40) | 3:29.88 | |
| 5 | 8 | Great Britain | Oliver Morgan (53.25) James Wilby (58.48) Jacob Peters (51.50) Matt Richards (46.93) | 3:30.16 | |
| 6 | 1 | Japan | Ryosuke Irie (53.71) Ippei Watanabe (59.41) Naoki Mizunuma (51.26) Katsuhiro Matsumoto (48.20) | 3:32.58 | |
| 7 | 7 | Canada | Javier Acevedo (54.35) James Dergousoff (1:00.03) Joshua Liendo (50.66) Ruslan Gaziev (47.57) | 3:32.61 | |
| 8 | 2 | Germany | Ole Braunschweig (54.16) Lucas Matzerath (58.70) Jan Eric Friese (52.16) Josha Salchow (47.89) | 3:32.91 | |