# Swimming at the 2015 World Aquatics Championships – Women's 4 × 100 metre medley relay

The Women's 4 × 100 metre medley relay competition of the swimming events at the 2015 World Aquatics Championships was held on 9 August with the heats and with the final.

## Records

Prior to the competition, the existing world and championship records were as follows.
| World record | United States | 3:52.05 | London, Great Britain | 4 August 2012 |
| Competition record | China | 3:52.19 | Rome, Italy | 1 August 2009 |

## Results
### Heats

The heats were held at 10:48.
| Rank | Heat | Lane | Nation | Swimmers | Time | Notes |
| 1 | 1 | 7 | China | Fu Yuanhui (59.24) Shi Jinglin (1:06.35) Chen Xinyi (57.42) Qiu Yuhan (54.03) | 3:57.04 | Q |
| 2 | 2 | 4 | United States | Kathleen Baker (59.98) Micah Lawrence (1:07.10) Kendyl Stewart (56.86) Margo Geer (53.18) | 3:57.12 | Q |
| 3 | 1 | 6 | Sweden | Michelle Coleman (1:00.55) Jennie Johansson (1:06.20) Sarah Sjöström (56.10) Louise Hansson (54.44) | 3:57.29 | Q |
| 4 | 3 | 6 | Australia | Madison Wilson (59.56) Lorna Tonks (1:07.34) Madeline Groves (58.18) Melanie Wright (52.87) | 3:57.95 | Q |
| 5 | 3 | 5 | Denmark | Mie Ø. Nielsen (59.67) Rikke Møller Pedersen (1:07.19) Jeanette Ottesen (57.37) Pernille Blume (54.15) | 3:58.38 | Q |
| 6 | 2 | 1 | Canada | Dominique Bouchard (1:00.39) Rachel Nicol (1:07.01) Noemie Thomas (57.55) Sandrine Mainville (54.07) | 3:59.02 | Q |
| 7 | 1 | 2 | Great Britain | Lauren Quigley (1:00.38) Siobhan-Marie O'Connor (1:06.75) Rachael Kelly (57.89) Rebecca Turner (55.00) | 4:00.02 | Q |
| 8 | 3 | 3 | Japan | Sayaka Akase (1:01.55) Kanako Watanabe (1:07.07) Natsumi Hoshi (57.93) Miki Uchida (53.88) | 4:00.43 | Q |
| 9 | 3 | 1 | Italy | Elena Gemo (1:01.21) Arianna Castiglioni (1:06.93) Ilaria Bianchi (58.25) Erika Ferraioli (54.53) | 4:00.92 | |
| 10 | 2 | 7 | Russia | Daria Ustinova (1:00.13) Vitalina Simonova (1:07.14) Nataliya Lovtsova (59.39) Veronika Popova (54.46) | 4:01.12 | |
| 11 | 3 | 0 | Germany | Lisa Graf (1:01.19) Vanessa Grimberg (1:07.71) Alexandra Wenk (57.87) Annika Bruhn (54.63) | 4:01.40 | |
| 12 | 2 | 3 | France | Béryl Gastaldello (1:00.60) Charlotte Bonnet (1:09.08) Marie Wattel (57.77) Anna Santamans (54.68) | 4:02.13 | |
| 13 | 2 | 0 | Finland | Mimosa Jallow (1:00.64) NR Jenna Laukkanen (1:07.10) Emilia Pikkarainen (59.47) Hanna-Maria Seppälä (55.09) | 4:02.30 | NR |
| 14 | 2 | 2 | Brazil | Etiene Medeiros (1:01.25) Jhennifer Conceição (1:09.28) Daynara de Paula (58.54) Larissa Oliveira (54.17) | 4:03.24 | |
| 15 | 1 | 5 | Czech Republic | Simona Baumrtová (1:00.88) Petra Chocová (1:07.80) Lucie Svěcená (59.96) Anna Kolářová (54.80) | 4:03.44 | NR |
| 16 | 3 | 9 | Spain | Duane Da Rocha (1:01.63) Jessica Vall (1:07.30) Judit Ignacio Sorribes (59.15) Melani Costa (55.83) | 4:03.91 | |
| 17 | 1 | 4 | Greece | Theodora Drakou (1:01.35) Aikaterini Sarakatsani (1:08.80) Anna Ntountounaki (58.49) Theodora Giareni (55.65) | 4:04.29 | NR |
| 18 | 1 | 3 | Poland | Alicja Tchórz (1:00.88) Dominika Sztandera (1:09.26) Anna Dowgiert (59.91) Katarzyna Wilk (54.38) | 4:04.43 | NR |
| 18 | 2 | 5 | Iceland | Eygló Ósk Gústafsdóttir (1:00.42) Hrafnhildur Lúthersdóttir (1:06.99) Jóhanna Gústafsdóttir (1:01.88) Bryndis Hansen (55.14) | 4:04.43 | NR |
| 20 | 3 | 7 | Hong Kong | Stephanie Au (1:00.95) NR Siobhán Haughey (1:08.70) Sze Hang Yu (59.60) Camille Cheng (55.29) | 4:04.54 | |
| 21 | 3 | 8 | Turkey | Halime Zülal Zeren (1:03.21) Viktoriya Zeynep Gunes (1:06.99) Gizem Bozkurt (1:00.94) Ekaterina Avramova (55.20) | 4:06.34 | NR |
| 22 | 3 | 2 | Venezuela | Jeserik Pinto (1:04.66) Mercedes Toledo (1:10.06) Isabella Páez (1:00.57) Arlene Semeco (56.45) | 4:11.74 | NR |
| 23 | 2 | 6 | Singapore | Quah Ting Wen (1:05.26) Samantha Yeo (1:11.24) Marina Chan (1:02.36) Amanda Lim (58.40) | 4:17.26 | |
| 24 | 2 | 8 | Mexico | Lourdes Villaseñor (1:05.34) Daniela Carrillo (1:10.55) Sharo Rodríguez (1:03.41) Montserrat Ortuño (59.85) | 4:19.15 | |
| 25 | 2 | 9 | Moldova | Tatiana Perstniova (1:04.57) Tatiana Chișca (1:12.61) Alexandra Vinicenco (1:08.45) Mihaela Bat (1:00.92) | 4:26.55 | |
| | 3 | 4 | Netherlands | Sharon van Rouwendaal Moniek Nijhuis Inge Dekker Femke Heemskerk | | DNS |

### Final

The final was held at 19:25.
| Rank | Lane | Nation | Swimmers | Time | Notes |
| | 4 | China | Fu Yuanhui (59.29) Shi Jinglin (1:05.56) Lu Ying (56.56) Shen Duo (53.00) | 3:54.41 | |
| | 3 | Sweden | Michelle Coleman (1:00.74) Jennie Johansson (1:05.63) Sarah Sjöström (55.28) Louise Hansson (53.59) | 3:55.24 | ER |
| | 6 | Australia | Emily Seebohm (58.81) Taylor McKeown (1:07.38) Emma McKeon (57.59) Bronte Campbell (51.78) | 3:55.56 | |
| 4 | 5 | United States | Missy Franklin (59.81) Jessica Hardy (1:06.32) Kendyl Stewart (57.24) Simone Manuel (53.39) | 3:56.76 | |
| 5 | 2 | Denmark | Mie Ø. Nielsen (59.47) Rikke Møller Pedersen (1:07.17) Jeanette Ottesen (56.50) Pernille Blume (54.47) | 3:57.61 | |
| 6 | 7 | Canada | Dominique Bouchard (59.80) Rachel Nicol (1:07.00) Katerine Savard (57.28) Sandrine Mainville (53.88) | 3:57.96 | |
| | 1 | Great Britain | Lauren Quigley (59.84) Siobhan-Marie O'Connor Rachael Kelly Francesca Halsall | | DSQ |
| | 8 | Japan | Sayaka Akase (1:00.88) Kanako Watanabe Natsumi Hoshi Miki Uchida | | DSQ |