The Mixed 4 × 100 metre medley relay competition at the 2024 World Aquatics Championships was held on 14 February 2024.

Records Prior to the competition, the existing world and championship records were as follows.

Results Heats The heats were started at 10:47.

Rank Heat Lane Nation Swimmers Time Notes 1 4 3 Medi Harris (1:00.62)James Wilby (1:00.00)Duncan Scott (52.15)Anna Hopkin (52.73) 3:45.50 Q 2 3 4 Bradley Woodward (53.89)Sam Williamson (59.49)Alexandria Perkins (57.47)Abbey Harkin (54.69) 3:45.54 Q 3 4 5 Jack Aikins (53.49)Jake Foster (59.29)Rachel Klinker (58.18)Addison Sauickie (54.97) 3:45.93 Q 4 4 7 Apostolos Christou (53.67)Arkadios Aspougalis (1:00.54)Anna Ntountounaki (57.37)Theodora Drakou (54.96) 3:46.54 Q 5 4 2 Ksawery Masiuk (53.09)Dominika Sztandera (1:07.28)Adrian Jaśkiewicz (51.63)Kornelia Fiedkiewicz (54.57) 3:46.57 Q 6 4 6 Osamu Kato (54.30)Ikuru Hiroshima (1:00.44)Chiharu Iitsuka (58.13)Nagisa Ikemoto (54.05) 3:46.92 Q 7 3 6 Hanna Rosvall (1:01.21)Erik Persson (1:00.52)Louise Hansson (56.99)Robin Hanson (48.78) 3:47.50 Q 8 3 2 Michele Lamberti (54.12)Ludovico Viberti (59.63)Giulia D'Innocenzo (59.45)Chiara Tarantino (54.45) 3:47.65 Q 9 3 3 Blake Tierney (54.12)James Dergousoff (1:01.46)Katerine Savard (58.70)Taylor Ruck (53.71) 3:47.99 10 4 9 Pieter Coetze (53.95)Lara van Niekerk (1:07.23)Erin Gallagher (57.46)Clayton Jimmie (49.39) 3:48.03 11 4 4 Chen Jie (1:02.38)Dong Zhihao (59.18)Yu Yiting (58.27)Ji Xinjie (48.33) 3:48.16 12 3 7 Carmen Weiler (1:01.00)Carles Coll (1:00.56)Mario Mollá (51.98)María Daza (55.53) 3:49.07 13 4 8 Ádám Jászó (54.23)Eszter Békési (1:08.99)Richárd Márton (52.69)Petra Senánszky (54.49) 3:50.40 14 4 1 Levenia Sim (1:02.89)Letitia Sim (1:06.94)Tzen Wei Teong (52.26)Mikkel Lee (48.93) 3:51.02 15 2 5 Erikas Grigaitis (55.49)Rūta Meilutytė (1:07.39)Andrius Ŝidlauskas (53.67)Smilte Plytnykaitė (55.44) 3:51.99 16 4 0 Jerard Jacinto (57.38)Thanya Dela Cruz (1:08.87)Jarod Hatch (53.35)Kayla Sanchez (54.31) 3:53.91 17 3 1 Xeniya Ignatova (1:02.36)Arsen Korzhakhmetov (1:03.32)Sofia Spodarenko (59.51)Adilbek Mussin (49.26) 3:54.45 18 3 9 Teresa Ivan (1:02.55)František Jablčník (1:04.84)Tibor Tišťan (54.88)Tamara Potocká (55.57) 3:57.84 19 3 8 Cindy Cheung (1:02.18)Lau Shiu Yue (1:10.14)Natalie Kan (1:00.00)Ian Ho (50.77) 4:03.09 20 2 2 Ariuntamir Enkh-Amgalan (1:04.72)Erkhes Enkhtur (1:05.48)Enkhtamir Batbayar (58.42)Batbayaryn Enkhkhüslen (56.47) 4:05.09 NR 21 2 8 Suvana Chetana Baskar (1:06.32)Likhith Selvaraj Prema (1:03.53)Tanish George Mathew (56.04)Dhinidhi Desinghu (59.21) 4:05.10 22 1 6 Jacob Story (59.91)Lanihei Connolly (1:10.66)Wesley Roberts (54.69)Mia Laban (1:00.54) 4:05.80 23 3 0 Ratthawit Thammananthachote (58.10)Saovanee Boonamphai (1:11.32)Navaphat Wongcharoen (53.71)Jenjira Srisaard (1:02.81) 4:05.94 24 2 3 Lamar Taylor (56.82)Rhanishka Gibbs (1:12.42)Marvin Johnson (56.94)Victoria Russell (1:00.73) 4:06.91 25 2 6 Artur Barseghyan (1:00.88)Ashot Chakhoyan (1:05.44)Varsenik Manucharyan (1:03.62)Ani Poghosyan (58.65) 4:08.59 NR 26 2 0 Kirabo Namutebi (1:12.34)Tendo Mukalazi (1:07.69)Jesse Ssengonzi (53.76)Gloria Muzito (56.15) 4:09.94 NR 27 1 3 Imara Thorpe (1:09.59)Maria Brunlehner (1:14.09)Ridhwan Mohamed (57.84)Monyo Maina (52.29) 4:13.81 28 2 4 Anthony Pineiro (57.62)Javier Núñez (1:07.44)María Alejandra Fernández (1:06.43)Alejandra Santana (1:02.95) 4:14.44 29 2 7 Amani Al-Obaidli (1:06.02)Saud Ghali (1:07.15)Ahmed Theibich (1:02.54)Noor Yusuf Abdulla (1:04.97) 4:20.68 NR 30 2 9 Katerson Moya (1:07.31)Tasi Limtiaco (1:04.60)Kestra Kihleng (1:11.67)Taeyanna Adams (1:05.67) 4:29.25 NR 31 1 4 James Hendrix (1:04.34)Israel Poppe (1:11.84)Amaya Bollinger (1:13.33)Mia Lee (1:01.23) 4:30.74 NR 32 1 5 Hamna Ahmed (1:19.87)Mubal Azzam Ibrahim (1:14.47)Mohamed Rihan Shiham (1:01.39)Aishath Ulya Shaig (1:06.10) 4:41.83 2 1 Did not start 3 5 Maaike de Waard (1:00.67)Caspar Corbeau (59.00)Nyls Korstanje (51.36)Kira Toussaint Disqualified

Final The final was started at 20:48.

Rank Lane Nation Swimmers Time Notes 3 Hunter Armstrong (53.07)Nic Fink (58.27)Claire Curzan (56.54)Kate Douglass (52.34) 3:40.22 5 Bradley Woodward (53.92)Sam Williamson (59.54)Brianna Throssell (57.22)Shayna Jack (52.44) 3:43.12 4 Medi Harris (1:00.28)Adam Peaty (59.42)Matthew Richards (52.87)Anna Hopkin (52.52) 3:45.09 4 2 Ksawery Masiuk (53.39)Dominika Sztandera (1:06.98)Jakub Majerski (51.05)Katarzyna Wasick (54.62) 3:46.04 5 6 Apostolos Christou (53.50)Arkadios Aspougalis (1:01.22)Anna Ntountounaki (56.88)Theodora Drakou (55.09) 3:46.69 6 8 Michele Lamberti (54.48)Nicolò Martinenghi (58.21)Giulia D'Innocenzo (1:00.22)Chiara Tarantino (54.38) 3:47.29 7 1 Hanna Rosvall (1:01.50)Erik Persson (1:00.16)Louise Hansson (57.39)Björn Seeliger (48.41) 3:47.46 8 7 Osamu Kato (54.68)Ikuru Hiroshima (1:00.50)Chiharu Iitsuka (58.16)Nagisa Ikemoto (54.26) 3:47.60

References