Swimming at the 2017 World Aquatics Championships – Women's 4 × 100 metre freestyle relay
The Women's 4 × 100 metre freestyle relay competition at the 2017 World Championships will be held on 23 July 2017.
Records
Prior to the competition, the existing world and championship records were as follows.Results
Heats
The heats were held at 11:39.Final
The final was held at 19:03.| Rank | Lane | Nation | Swimmers | Time | Notes |
| 4 | Mallory Comerford Kelsi Worrell Katie Ledecky Simone Manuel | 3:31.72 | AM | ||
| 3 | Shayna Jack Bronte Campbell Brittany Elmslie Emma McKeon | 3:32.01 | |||
| 5 | Kim Busch Femke Heemskerk Maud van der Meer Ranomi Kromowidjojo | 3:32.64 | |||
| 4 | 2 | Sandrine Mainville Chantal Van Landeghem Kayla Sanchez Penny Oleksiak | 3:33.88 | ||
| 5 | 6 | Sarah Sjöström Michelle Coleman Ida Lindborg Louise Hansson | 3:33.94 | NR | |
| 6 | 7 | Zhu Menghui Zhang Yufei Wu Yue Ai Yanhan | 3:36.49 | ||
| 7 | 1 | Rikako Ikee Tomomi Aoki Yui Yamane Chihiro Igarashi | 3:38.24 | ||
| 8 | 8 | Signe Bro Sarah Bro Emilie Beckmann Pernille Blume | 3:38.86 |