# Swimming at the 2015 World Aquatics Championships – 4 × 100 metre mixed medley relay

The 4 × 100 metre mixed medley relay competition of the swimming events at the 2015 World Aquatics Championships was held on 5 August with the heats and the final.

## Records

Prior to the competition, the existing world and championship records were as follows.
| World record | United Kingdom | 3:44.02 | Berlin, Germany | 19 August 2014 |
| Competition record | | | | |
The following new records were set during this competition
| Date | Event | Nation | Time | Record |
| 5 August | Heats | Russia | 3:45.87 | CR |
| 5 August | Heats | United States | 3:42.33 | WR |
| 5 August | Final | Great Britain | 3:41.71 | WR |

## Results
### Heats

The heats were held at 10:49.
| Rank | Heat | Lane | Nation | Swimmers | Time | Notes |
| 1 | 3 | 2 | United States | Ryan Murphy (52.18) Kevin Cordes (58.33) Kendyl Stewart (57.78) Lia Neal (54.04) | 3:42.33 | Q, WR |
| 2 | 3 | 0 | Great Britain | Chris Walker-Hebborn (53.40) Ross Murdoch (59.14) Rachael Kelly (58.02) Fran Halsall (53.83) | 3:44.39 | Q |
| 3 | 4 | 3 | Germany | Jan-Philip Glania (53.89) Hendrik Feldwehr (59.22) Alexandra Wenk (57.88) Annika Bruhn (54.40) | 3:45.39 | Q, NR |
| 4 | 2 | 4 | Russia | Daria Ustinova (59.89) Kirill Prigoda (59.99) Daniil Pakhomov (51.52) Veronika Popova (54.47) | 3:45.87 | Q |
| 5 | 3 | 7 | Italy | Simone Sabbioni (53.46) Arianna Castiglioni (1:07.13) Matteo Rivolta (51.29) Erika Ferraioli (54.15) | 3:46.03 | Q, NR |
| 6 | 1 | 6 | China | Xu Jiayu (53.44) Li Xiang (1:01.38) Chen Xinyi (58.51) Zhu Menghui (54.15) | 3:47.48 | Q, AS |
| 7 | 3 | 1 | Hungary | Gábor Balog (54.03) David Horvath (1:01.66) Evelyn Verrasztó (59.19) Zsuzsanna Jakabos (54.62) | 3:49.50 | Q |
| 8 | 4 | 9 | Canada | Russell Wood (54.76) Rachel Nicol (1:07.60) Noemie Thomas (57.96) Karl Krug (49.28) | 3:49.60 | Q |
| 9 | 4 | 4 | Brazil | Daynara de Paula (1:02.58) Felipe Lima (1:00.86) Daiene Dias (1:00.17) João de Lucca (49.84) | 3:53.45 | |
| 10 | 3 | 5 | Switzerland | Nils Liess (56.01) Martin Schweizer (1:01.81) Danielle Villars (59.47) Megan Connor (56.27) | 3:53.56 | |
| 11 | 1 | 4 | Finland | Mimosa Jallow (1:01.48) Sami Aaltomaa (1:01.64) Emilia Pikkarainen (59.79) Ari-Pekka Liukkonen (52.46) | 3:55.37 | |
| 12 | 4 | 7 | Colombia | Omar Pinzón (57.42) Jorge Murillo (1:01.57) Jessica Camposano (1:00.84) Isabella Arcila (55.59) | 3:55.42 | |
| 13 | 4 | 6 | Singapore | Quah Zheng Wen (54.63) Ho Ru'En Roanne (1:11.98) Quah Ting Wen (59.80) Yeo Kai Quan (51.10) | 3:57.51 | |
| 14 | 2 | 8 | Mexico | Lourdes Villaseñor (1:04.70) Daniela Carrillo (1:10.01) Daniel Ramirez Carranza (55.15) Alejandro Escudero (50.95) | 4:00.81 | |
| 15 | 1 | 3 | Thailand | Kasipat Chograthin (59.13) Radomyos Matjiur (1:04.03) Sutasinee Pankaew (1:03.60) Jenjira Srisa-Ard (1:00.43) | 4:07.19 | |
| 16 | 2 | 3 | Azerbaijan | Boris Kirillov (58.16) Anton Zheltyakov (1:02.95) Alsu Bayramova (1:06.50) Fatima Alkaramova (1:00.32) | 4:07.93 | |
| 17 | 2 | 0 | Costa Rica | Mario Montoya (1:01.81) Esteban Araya (1:07.64) Marie Laura Meza (1:01.11) Helena Moreno (1:00.19) | 4:10.75 | |
| 18 | 2 | 9 | Bolivia | Andrew Rutherfurd (59.14) José Quintanilla (1:08.95) Karen Torrez (1:02.83) María José Ribera (1:01.57) | 4:12.49 | |
| 19 | 2 | 2 | Papua New Guinea | Ryan Pini (56.38) Tegan McCarthy (1:17.87) Sam Seghers (56.07) Barbara Vali-Skelton (1:03.58) | 4:13.90 | NR |
| 20 | 3 | 6 | Zambia | Jade Howard (1:08.07) Alex Axiotis (1:07.06) Ralph Goveia (56.41) Tilka Paljk (1:02.86) | 4:14.40 | |
| 21 | 4 | 0 | Macau | Ngou Pok Man (59.43) Lei On Kei (1:14.85) Chao Man Hou (1:00.80) Long Chi Wai (1:00.94) | 4.16.02 | |
| 22 | 2 | 5 | Sri Lanka | Kimiko Raheem (1:05.47) Machiko Raheem (1:24.19) Matthew Abeysinghe (56.34) Cherantha de Silva (53.24) | 4:19.24 | |
| 23 | 3 | 8 | Jordan | Mohammed Bedour (1:04.16) Lydia Musleh (1:18.81) Khader Baqlah (57.68) Talita Baqlah (59.06) | 4:19.71 | |
| 24 | 3 | 9 | Dominican Republic | Arianna Sanna (1:10.71) Jean Luis Gómez (1:10.40) Dorian McMenemy (1:06.93) Jhonny Pérez (51.75) | 4:19.79 | |
| 25 | 4 | 1 | Kenya | Talisa Lanoe (1:09.32) Issa Mohamed (1:13.15) Emily Muteti (1:05.72) Hamdan Bayusuf (55.80) | 4:23.99 | |
| 26 | 4 | 5 | Mongolia | Enkhkhuslen Batbayar (1:13.20) Delgerkhuu Myagmar (1:14.17) Batsaikhan Dulguun (59.05) Yesui Bayar (1:08.04) | 4:34.46 | |
| | 2 | 7 | Turkey | Ekaterina Avramova (1:02.97) Viktoriya Zeynep Gunes (DSQ) Kaan Türker Ayar Kemal Arda Gürdal | DSQ | |
| | 3 | 4 | France | Benjamin Stasiulis (54.43) Giacomo Perez-Dortona (59.55) Marie Wattel (58.62) Anna Santamans (DSQ) | DSQ | |
| | 1 | 2 | Albania | | DNS | |
| | 1 | 5 | Philippines | | DNS | |
| | 2 | 1 | Suriname | | DNS | |
| | 2 | 6 | Egypt | | DNS | |
| | 3 | 3 | Japan | | DNS | |
| | 4 | 2 | Argentina | | DNS | |
| | 4 | 8 | Mozambique | | DNS | |

### Final

The final was held at 19:19.
| Rank | Lane | Nation | Swimmers | Time | Notes |
| | 5 | Great Britain | Chris Walker-Hebborn (52.94) Adam Peaty (57.98) Siobhan-Marie O'Connor (57.02) Fran Halsall (53.77) | 3:41.71 | WR |
| | 4 | United States | Ryan Murphy (53.31) Kevin Cordes (58.63) Katie McLaughlin (57.56) Margo Geer (53.77) | 3:43.27 | |
| | 3 | Germany | Jan-Philip Glania (53.52) Hendrik Feldwehr (59.16) Alexandra Wenk (57.21) Annika Bruhn (54.24) | 3:44.13 | NR |
| 4 | 7 | China | Xu Jiayu (52.74) Li Xiang (1:00.47) Lu Ying (57.39) Zhu Menghui (54.05) | 3:44.65 | AS |
| 5 | 6 | Russia | Anastasia Fesikova (1:00.48) Yuliya Yefimova (1:05.46) Daniil Pakhomov (51.60) Vladimir Morozov (47.29) | 3:44.83 | |
| 6 | 2 | Italy | Simone Sabbioni (53.68) Arianna Castiglioni (1:06.44) Piero Codia (51.59) Silvia Di Pietro (53.88) | 3:45.59 | NR |
| 7 | 8 | Canada | Russell Wood (54.51) Richard Funk (59.69) Katerine Savard (57.83) Sandrine Mainville (54.20) | 3:46.23 | |
| 8 | 1 | Hungary | Gábor Balog (54.32) Dávid Horváth (1:01.80) Evelyn Verrasztó (59.46) Zsuzsanna Jakabos (54.48) | 3:50.06 | |
* Team Germany
* Team USA
* Team UK