Swimming at the 2015 World Aquatics Championships – Women's 4 × 100 metre freestyle relay
The Women's 4 × 100 metre freestyle relay competition of the swimming events at the 2015 World Aquatics Championships was held on 2 August with the heats and the final.
Records
Prior to the competition, the existing world and championship records were as follows.The following new records were set during this competition.
| Date | Event | Nation | Time | Record |
| 2 August | Final | 3:31.48 | CR |
Results
Heats
The heats were held at 11:58.| Rank | Heat | Lane | Nation | Swimmers | Time | Notes |
| 1 | 2 | 9 | Shannon Vreeland Abbey Weitzeil Margo Geer Lia Neal | 3:35.52 | Q | |
| 2 | 2 | 8 | Emily Seebohm Madison Wilson Melanie Wright Bronte Barratt | 3:35.86 | Q | |
| 3 | 1 | 7 | Maud van der Meer Marrit Steenbergen Femke Heemskerk Ranomi Kromowidjojo | 3:35.91 | Q | |
| 4 | 1 | 3 | Michelle Coleman Louise Hansson Magdalena Kuras Sarah Sjöström | 3:36.24 | Q | |
| 5 | 1 | 9 | Sandrine Mainville Michelle Williams Victoria Poon Chantal van Landeghem | 3:37.64 | Q | |
| 5 | 2 | 1 | Zhu Menghui Tang Yuting Fang Yi Shen Duo | 3:37.64 | Q | |
| 7 | 1 | 6 | Erika Ferraioli Silvia Di Pietro Federica Pellegrini Laura Letrari | 3:37.88 | Q | |
| 8 | 2 | 5 | Charlotte Bonnet Beryl Gastaldello Cloé Hache Anna Santamans | 3:38.35 | Q | |
| 9 | 2 | 3 | Miki Uchida Rikako Ikee Misaki Yamaguchi Yayoi Matsumoto | 3:38.47 | ||
| 10 | 2 | 2 | Veronika Popova Nataliya Lovtsova Viktoriya Andreyeva Mariia Kameneva | 3:38.63 | ||
| 11 | 1 | 4 | Larissa Oliveira Graciele Herrmann Etiene Medeiros Daynara de Paula | 3:40.24 | ||
| 12 | 2 | 4 | Katarzyna Wilk Alicja Tchórz Aleksandra Urbańczyk Anna Dowgiert | 3:40.89 | ||
| 13 | 1 | 1 | Annika Bruhn Dorothea Brandt Alexandra Wenk Marlene Huther | 3:41.56 | ||
| 14 | 1 | 5 | Camille Cheng Stephanie Au Sze Hang Yu Siobhan Haughey | 3:42.11 | ||
| 15 | 1 | 0 | Maria Ugolkova Sasha Touretski Danielle Villars Noemi Girardet | 3:43.70 | NR | |
| 16 | 2 | 6 | Birgit Koschischek Lisa Zaiser Lena Kreundl Jördis Steinegger | 3:44.06 | ||
| 17 | 1 | 2 | Isabella Arcila Carolina Colorado Henao Maria Alvarez Pugliese Jessica Camposano | 3:46.15 | ||
| 18 | 1 | 8 | Amanda Lim Quah Ting Wen Marina Chan Rachel Tseng | 3:51.10 | ||
| 19 | 2 | 0 | Gizem Bozkurt Ekaterina Avramova Merve Eroglu Halime Zülal Zeren | 3:53.22 | ||
| 2 | 7 | Hanna-Maria Seppälä Mimosa Jallow Roosa Mört Fanny Teijonsalo |
Final
The final was held at 18:45.| Rank | Lane | Nation | Swimmers | Time | Notes |
| 5 | Emily Seebohm Emma McKeon Bronte Campbell Cate Campbell | 3:31.48 | CR | ||
| 3 | Maud van der Meer Marrit Steenbergen Femke Heemskerk | 3:33.67 | |||
| 4 | Missy Franklin Margo Geer Lia Neal Simone Manuel | 3:34.61 | |||
| 4 | 6 | Michelle Coleman Louise Hansson Sarah Sjöström Magdalena Kuras | 3:35.71 | ||
| 5 | 2 | Sandrine Mainville Michelle Williams Katerine Savard | 3:36.44 | NR | |
| 6 | 1 | Erika Ferraioli Silvia Di Pietro Laura Letrari Federica Pellegrini | 3:37.16 | NR | |
| 7 | 7 | Zhu Menghui Tang Yuting Fang Yi Shen Duo | 3:37.64 | ||
| 8 | 8 | Charlotte Bonnet Beryl Gastaldello Cloé Hache Anna Santamans | 3:38.46 |