Colonel William A. Phillips

The Women's 4 × 100 metre freestyle relay competition at the 2017 World Championships will be held on 23 July 2017.^[1]^[2]

Records

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

World record	Australia	3:30.65	Rio de Janeiro, Brazil	6 August 2016
Competition record	Australia	3:31.48	Kazan, Russia	2 August 2015

The heats were held at 11:39.^[3]

Rank	Heat	Lane	Nation	Swimmers	Time	Notes
1	1	4	United States	Lia Neal (53.94) Kelsi Worrell (53.27) Olivia Smoliga (53.67) Mallory Comerford (52.47)	3:33.35	Q
2	1	5	Netherlands	Maud van der Meer (54.72) Femke Heemskerk (52.72) Kim Busch (54.79) Ranomi Kromowidjojo (52.03)	3:34.26	Q
3	2	4	Australia	Emily Seebohm (54.32) Madison Wilson (53.94) Brittany Elmslie (53.61) Shayna Jack (53.31)	3:35.18	Q
4	1	1	Sweden	Michelle Coleman (53.21) Sarah Sjöström (52.19) Nathalie Lindborg (55.90) Louise Hansson (54.20)	3:35.50	Q
5	2	5	Canada	Sandrine Mainville (53.87) Michelle Toro (54.50) Rebecca Smith (53.93) Kayla Sanchez (53.54)	3:35.84	Q
6	2	6	China	Zhu Menghui (54.06) Ai Yanhan (54.71) Wu Yue (54.46) Zhang Yufei (53.79)	3:37.02	Q
7	1	3	Japan	Rikako Ikee (54.09) Tomomi Aoki (54.34) Yui Yamane (54.59) Chihiro Igarashi (54.44)	3:37.46	Q
8	1	6	Denmark	Signe Bro (54.85) Sarah Bro (55.60) Emilie Beckmann (55.55) Pernille Blume (52.29)	3:38.29	Q
9	2	2	Hungary	Flóra Molnár (54.93) Fanni Gyurinovics (55.16) Evelyn Verrasztó (54.73) Zsuzsanna Jakabos (54.08)	3:38.90
10	2	3	Italy	Silvia Di Pietro (54.80) Erika Ferraioli (54.91) Giorgia Biondani (55.47) Federica Pellegrini (53.90)	3:39.08
11	2	1	Israel	Andrea Murez (54.79) Zohar Shikler (56.75) Keren Siebner (56.03) Amit Ivry (56.78)	3:44.35
12	1	2	Hong Kong	Siobhán Haughey (53.99 NR) Claudia Lau (56.26) Ho Nam Wai (57.48) Sze Hang Yu (56.66)	3:44.39
13	2	7	South Africa	Erin Gallagher (55.94) Kate Beavon (59.98) Samantha Randle (1:00.68) Kaylene Corbett (1:01.23)	3:57.83
	1	7	Slovakia	DNS

The final was held at 19:03.^[4]

Rank	Lane	Nation	Swimmers	Time	Notes
	4	United States	Mallory Comerford (52.59 AM) Kelsi Worrell (53.16) Katie Ledecky (53.83) Simone Manuel (52.14)	3:31.72	AM
	3	Australia	Shayna Jack (53.75) Bronte Campbell (52.14) Brittany Elmslie (53.83) Emma McKeon (52.29)	3:32.01
	5	Netherlands	Kim Busch (54.05) Femke Heemskerk (52.84) Maud van der Meer (53.77) Ranomi Kromowidjojo (51.98)	3:32.64
4	2	Canada	Sandrine Mainville (53.77) Chantal Van Landeghem (52.97) Kayla Sanchez (54.16) Penny Oleksiak (52.98)	3:33.88
5	6	Sweden	Sarah Sjöström (51.71 WR) Michelle Coleman (52.68) Ida Lindborg (55.59) Louise Hansson (53.96)	3:33.94	NR
6	7	China	Zhu Menghui (53.79) Zhang Yufei (54.31) Wu Yue (54.96) Ai Yanhan (53.43)	3:36.49
7	1	Japan	Rikako Ikee (54.59) Tomomi Aoki (54.45) Yui Yamane (54.62) Chihiro Igarashi (54.58)	3:38.24
8	8	Denmark	Signe Bro (54.72) Sarah Bro (56.60) Emilie Beckmann (54.84) Pernille Blume (52.70)	3:38.86