# 2024 World Aquatics Swimming Championships (25 m) – Mixed 4 × 50 metre medley relay

The Mixed 4 × 50 metre medley relay competition of the 2024 World Aquatics Swimming Championships (25 m) was held on 11 December 2024.

## Records

Prior to the competition, the existing world and championship records were as follows.
| World record | United States (USA) | 1:35.15 | Melbourne, Australia | 14 December 2022 |
| Competition record | United States (USA) | 1:35.15 | Melbourne, Australia | 14 December 2022 |

## Results
### Heats

The heats were started at 11:07.
| Rank | Heat | Lane | Nation | Swimmers | Time | Notes |
| 1 | 6 | 7 | Canada | Kylie Masse (26.06) Finlay Knox (26.26) Ilya Kharun (21.06) Ingrid Wilm (23.88) | 1:37.26 | Q |
| 2 | 5 | 5 | Sweden | Louise Hansson (26.12) Daniel Kertes (25.67) Sara Junevik (24.55) Elias Persson (20.94) | 1:37.28 | Q, NR |
| 3 | 5 | 8 | United States | Shaine Casas (22.87) AJ Pouch (26.33) Alex Shackell (25.04) Alex Walsh (23.26) | 1:37.50 | Q |
| 4 | 3 | 2 | Australia | Iona Anderson (26.06) Joshua Yong (26.08) Matthew Temple (22.06) Meg Harris (23.57) | 1:37.77 | Q, OC |
| 5 | 4 | 3 | Japan | Kaiya Seki (23.5) Taku Taniguchi (25.32) Mizuki Hirai (25.26) Yume Jinno (24.1) | 1:38.18 | Q |
| 6 | 5 | 7 | Neutral Athletes B | Pavel Samusenko (23.13) Oleg Kostin (25.94) Daria Klepikova (25.61) Daria Trofimova (23.62) | 1:38.30 | Q |
| 7 | 6 | 4 | Italy | Lorenzo Mora (23.28) Ludovico Blu Art Viberti (25.9) Silvia Di Pietro (24.91) Chiara Tarantino (24.23) | 1:38.32 | Q |
| 8 | 5 | 4 | Netherlands | Kira Toussaint (26.48) Koen de Groot (25.97) Thomas Verhoeven (22.18) Milou van Wijk (23.84) | 1:38.47 | Q |
| 9 | 4 | 4 | Great Britain | Oliver Morgan (23.63) Angharad Evans (29.41) Joshua Gammon (22.58) Eva Okaro (23.42) | 1:39.04 | R |
| 10 | 1 | 4 | Neutral Athletes A | Anastasiya Shkurdai (26.73) Ilya Shymanovich (25.42) Grigori Pekarski (21.87) Anastasiya Kuliashova (25.05) | 1:39.07 | R |
| 11 | 3 | 5 | Spain | Carmen Weiler (26.80) Carles Coll (25.70) Mario Mollá (22.37) María Daza (24.24) | 1:39.11 | NR |
| 12 | 6 | 3 | Norway | Markus Lie (23.65) Nicholas Lia (25.98) Hedda Øritsland (25.6) Mari Moen (23.91) | 1:39.14 | |
| 13 | 2 | 2 | Croatia | Nikola Miljenić (23.37) Meri Mataja (29.69) Jana Pavalić (25.74) Jere Hribar (20.36) | 1:39.16 | NR |
| 14 | 2 | 4 | China | Wang Gukailai (23.53) Qin Haiyang (25.91) Lu Xingchen (26.04) Liu Shuhan (23.89) | 1:39.37 | |
| 15 | 6 | 5 | Estonia | Ralf Tribuntsov (23.11) Eneli Jefimova (28.93) Daniel Zaitsev (21.9) Maria Romanjuk (25.77) | 1:39.71 | |
| 16 | 4 | 1 | Poland | Ksawery Masiuk (24.11) Jan Kałusowski (26.21) Paulina Peda (25.69) Katarzyna Wasick (23.72) | 1:39.73 | |
| 17 | 2 | 1 | South Korea | Kim Seung-won (27.400) Choi Dong-yeol (26.03) Jeong So-eun (26.31) Ji Yu-chan (20.38) | 1:40.12 | NR |
| 18 | 4 | 5 | Finland | Ronny Brannkarr (24.09) Davin Elias Lindholm (26.37) Laura Lahtinen (25.48) Fanny Teijonsalo (24.21) | 1:40.15 | |
| 19 | 5 | 3 | Hungary | Ádám Jászó (23.91) Olivér Gál (27.12) Lora Komoróczy (25.32) Petra Senánszky (24.04) | 1:40.39 | |
| 20 | 4 | 7 | South Africa | Jessica Thompson (27.16) Michael Houlie (25.67) Caitlin de Lange (26.40) Kris Mihaylov (22.09) | 1:41.32 | AF |
| 21 | 3 | 8 | Hong Kong | Hayden Kwan (24.00) Man Wui Kiu (31.25) Tam Hoi Lam (25.73) Ian Yentou Ho (20.52) | 1:41.50 | NR |
| 22 | 5 | 6 | Slovakia | Martin Perečinský (24.97) Andrea Podmaníková (30.59) Tamara Potocká (25.09) Matej Duša (21.15) | 1:41.80 | NR |
| 23 | 6 | 8 | Kazakhstan | Xeniya Ignatova (27.84) Adelaida Pchelintseva (30.22) Adilbek Mussin (22.56) Gleb Kovalenya (21.58) | 1:42.20 | |
| 24 | 4 | 8 | Iceland | Guðmundur Leó Rafnsson (24.90) Snorri Dagur Einarsson (27.11) Jóhanna Elín Guðmundsdóttir (27.03) Vala Dís Cicero (25.02) | 1:44.06 | |
| 25 | 2 | 3 | Thailand | Saovanee Boonamphai (28.37) Jenjira Srisa-Ard (30.03) Surasit Thongdeang (24.16) Pongpanod Trithan (22.61) | 1:45.17 | NR |
| 26 | 5 | 2 | Dominican Republic | Elizabeth Jiménez (28.41) Josué Domínguez (26.79) Javier Núñez (23.85) Darielys Ortiz (26.53) | 1:45.58 | |
| 27 | 2 | 8 | Philippines | Metin Junior Jason Mahmutoglu (24.56) Xiandi Chua (32.92) Chloe Isleta (26.48) Adrian Eichler (22.6) | 1:46.56 | NR |
| 28 | 2 | 6 | Namibia | Jessica Humphrey (28.5) Ronan Wantenaar (26.27) Oliver Durand (24.77) Molina Smalley (27.09) | 1:46.63 | NR |
| 29 | 5 | 1 | Kenya | Imara Bella Patricia Thorpe (28.96) NR Haniel Kudwoli (28.77) Stephen Nyoike (24.94) Sara Mose (24.96) | 1:47.63 | NR |
| 30 | 6 | 6 | Uganda | Tendo Kaumi (27.4) Tendo Mukalazi (28.48) Kirabo Namutebi (28.94) Gloria Anna Muzito (24.41) | 1:49.23 | NR |
| 31 | 1 | 5 | Kyrgyzstan | Elizaveta Pecherskikh (28.59) Denis Petrashov (26.8) Daniil Mistriukov (26.71) Aiymkyz Aidaralieva (27.54) | 1:49.64 | |
| 32 | 6 | 2 | Albania | Grisi Koxhaku (25.95) Stella Gjoka (32.86) Kaltra Meca (28.81) Reidi Resuli (22.47) | 1:50.09 | |
| 33 | 1 | 2 | Jamaica | Leanna Wainwright (29.05) Sidrell Williams (30.69) Jessica Calderbank (27.4) Nathaniel Thomas (23.03) | 1:50.17 | |
| 34 | 2 | 7 | Moldova | Chirill Chirsanov (26.05) Constantin Malachi (27.60) Anastasia Basisto (28.75) Natalia Zaiteva (28.31) | 1:50.71 | |
| 35 | 3 | 4 | Samoa | Kaiya Brown (31.89) Kokoro Frost (30.50) Paige Schendelaar-Kemp (27.35) Hector Langkilde (22.38) | 1:52.12 | |
| 36 | 3 | 1 | North Korea | Kim Sol-song (31.55) Kim Won-ju (29.83) Kim Ryong-hyon (25.48) Pak Mi-song (25.49) | 1:52.35 | |
| 37 | 3 | 3 | Madagascar | Idealy Tendrinavalona (30.28) Jonathan Raharvel (28.01) Baritiana Andriampenomanana (28.16) Antsa Rabejaona (26.23) | 1:52.68 | NR |
| 38 | 6 | 1 | Jordan | Adnan Al-Abdallat (28.52) Amro Al-Wir (27.58) Tara Al-Oul (28.96) Karin Belbeisi (28.37) | 1:53.43 | NR |
| 39 | 1 | 3 | Northern Mariana Islands | Piper Raho (31.06) Kouki Cerezo Watanabe (30.08) Taiyo Akimaru (26.07) Maria Corazon Ayson Batallones (28.05) | 1:55.26 | |
| | 1 | 6 | Maldives | Mohamed Rihan Shiham (29.02) Hamna Ahmed Meral Ayn Latheef Mohamed Aan Hussain | Disqualified | Disqualified |
| | 4 | 2 | Peru | Joaquín Vargas (25.64) Anthony Puertas (28.96) Alexia Sotomayor (27.14) Rafaela Fernandini | Disqualified | Disqualified |
| | 2 | 5 | Cape Verde | | Did not start | Did not start |
| | 3 | 7 | Bahamas | | Did not start | Did not start |
| | 4 | 6 | Mongolia | | Did not start | Did not start |

### Final

The final was held at 19:06.
| Rank | Lane | Nation | Swimmers | Time | Notes |
| | 7 | Neutral Athletes B | Miron Lifintsev (22.39) Kirill Prigoda (24.94) Arina Surkova (24.43) Daria Trofimova (23.60) | 1:35.36 | ER |
| | 4 | Canada | Kylie Masse (25.87) Finlay Knox (25.53) Ilya Kharun (20.73) Ingrid Wilm (23.81) | 1:35.94 | |
| | 3 | United States | Shaine Casas (22.85) Michael Andrew (25.29) Regan Smith (24.90) Katharine Berkoff (23.16) | 1:36.20 | |
| 4 | 6 | Australia | Isaac Cooper (22.68) Joshua Yong (25.87) Alexandria Perkins (24.61) Meg Harris (23.62) | 1:36.78 | OC |
| 5 | 1 | Italy | Lorenzo Mora (22.85) Simone Cerasuolo (25.75) Silvia Di Pietro (25.04) Sara Curtis (23.16) | 1:36.80 | |
| 6 | 5 | Sweden | Louise Hansson (26.07) Daniel Kertes (25.48) Sara Junevik (24.49) Elias Persson (21.01) | 1:37.05 | NR |
| 7 | 2 | Japan | Kaiya Seki (23.04) Taku Taniguchi (25.21) Mizuki Hirai (25.07) Yume Jinno (23.97) | 1:37.29 | AS |
| 8 | 8 | Netherlands | Maaike de Waard (26.38) Caspar Corbeau (25.51) Tessa Giele (25.13) Nyls Korstanje (20.45) | 1:37.47 | |