The women's 4 × 100-metre freestyle relay event at the 2024 Summer Olympics was held on 27 July 2024 at Paris La Défense Arena, which was converted to a swimming pool for the swimming events.

Australia were the favourites to win the event, while the US, China and Canada were also in contention. All four teams progressed to the final.

In the final, Australia led from beginning to end to win with a new Olympic record of 3:28.92. The United States finished second with a new Americas record of 3:30.20 and China finished third with a new Asian record of 3:30.30. Australia's win gave them their fourth consecutive Olympic title in the event.

Background Australia won the event at the 2012, 2016 and 2020 Olympics, held the world record, and also won the event at the 2023 World Championships. Both SwimSwam and Swimming World opined that they would win, with SwimSwam calling them the "heavy favourite". Other contenders were the US, who Swimming World opined "could keep it close", China and Canada. SwimSwam and Swimming World both predicted the US would come second and China would take third.

The event was held at Paris La Défense Arena, which was converted to a swimming pool for the swimming events.

Qualification

Each National Olympic Committee could enter one team, and there were a total of sixteen qualifications places available. The first three qualifying places were taken by the podium finishers at the 2023 World Championships, and the final thirteen qualifying places were allocated to the fastest performances at the 2023 and 2024 World Championships.

Heats Two heats (preliminary rounds) took place on 27 July 2024, starting at 12:15. The teams with the best eight times in the heats advanced to the final. The United States won the first heat to qualify with the fastest time of 3:33.29, while Australia won the second heat to qualify with the fastest time of 3:31.57. China, Sweden, France, Canada, Great Britain and Italy also all qualified.

+ Results Rank Heat Lane Nation Swimmers Time Notes 1 2 4 Olivia Wunsch (53.94)Bronte Campbell (53.46)Meg Harris (52.23)Emma McKeon (51.94) 3:31.57 2 1 4 Abbey Weitzeil (53.60)Simone Manuel (53.23)Erika Connolly (53.83)Kate Douglass (52.63) 3:33.29 3 2 5 Cheng Yujie (53.95)Wu Qingfeng (53.84)Yu Yiting (54.05)Yang Junxuan (52.47) 3:34.31 4 2 3 Michelle Coleman (53.92)Sarah Sjöström (51.99)Sara Junevik (54.09)Sofia Åstedt (54.35) 3:34.35 5 2 2 Béryl Gastaldello (53.54)Mary-Ambre Moluh (53.49)Lison Nowaczyk (54.67)Charlotte Bonnet (53.55) 3:35.25 6 2 6 Penny Oleksiak (53.78)Mary-Sophie Harvey (54.15)Brooklyn Douthwright (53.81)Taylor Ruck (53.55) 3:35.29 7 1 5 Anna Hopkin (54.08)Eva Okaro (53.84)Lucy Hope (54.74)Freya Anderson (53.47) 3:36.13 8 1 6 Sofia Morini (53.92)Chiara Tarantino (54.14)Sara Curtis (53.93)Emma Virginia Menicucci (54.29) 3:36.28 9 1 3 Tessa Giele (55.24)Kim Busch (54.86)Sam van Nunen (54.26)Marrit Steenbergen (52.42) 3:36.78 10 2 1 Petra Senánszky (54.91)Lilla Minna Ábrahám (54.36)Panna Ugrai (54.25)Nikolett Pádár (53.81) 3:37.33 11 1 1 Signe Bro (55.45)Julie Kepp Jensen (54.52)Elisabeth Sabroe Ebbesen (55.10)Martine Damborg (54.45) 3:39.52 12 2 7 Ana Carolina Vieira (54.81)Stephanie Balduccini (53.83)Giovana Reis (55.73)Maria Paula Heitmann (56.23) 3:40.60 13 1 2 Katarzyna Wasick (54.71)Kornelia Fiedkiewicz (54.82)Julia Maik (55.57)Zuzanna Famulok (55.57) 3:40.67 14 2 8 Neža Klančar (54.29)Janja Šegel (55.22)Katja Fain (55.43)Tjaša Pintar (56.35) 3:41.29 15 1 7 Natalie Kan (56.91)Tam Hoi Lam (55.01)Camille Cheng (55.12)Stephanie Au (55.38) 3:42.42 16 1 8 Danielle Hill (55.61)Grace Davison (55.44)Erin Riordan (55.95)Victoria Catterson (55.67) 3:42.67

Final The final took place at 21:34 on 27 July. Australia led from beginning to end to win with a new Olympic record of 3:28.92, which broke their record of 3:29.69 set at the previous Olympics in Tokyo. The United States finished second with a new Americas record of 3:30.20, 0.10 seconds ahead of China, who finished third with a new Asian record of 3:30.30. Canada finished fourth with 3:32.99 and Sweden finished fifth with a new national record of 3:33.79.

Australia's win gave them their fourth consecutive Olympic win in the event, and Yang Junxuan's opening swim for China set a new national record of 52.48 in the individual version of the event.

+ Results Rank Lane Nation Swimmers Time Notes 4 Mollie O'Callaghan (52.24)Shayna Jack (52.35)Emma McKeon (52.39)Meg Harris (51.94) 3:28.92 OR 5 Kate Douglass (52.98)Gretchen Walsh (52.55)Torri Huske (52.06)Simone Manuel (52.61) 3:30.20 AM 3 Yang Junxuan (52.48 NR)Cheng Yujie (52.76)Zhang Yufei (52.75)Wu Qingfeng (52.31) 3:30.30 AS 4 7 Maggie Mac Neil (53.31)Taylor Ruck (53.20)Summer McIntosh (53.22)Penny Oleksiak (53.26) 3:32.99 5 6 Sarah Sjöström (52.53)Michelle Coleman (52.98)Sara Junevik (54.41)Louise Hansson (53.87) 3:33.79 NR 6 2 Béryl Gastaldello (53.83)Charlotte Bonnet (54.14)Mary-Ambre Moluh (53.37)Marie Wattel (53.65) 3:34.99 7 1 Anna Hopkin (53.31)Eva Okaro (53.75)Lucy Hope (54.95)Freya Anderson (53.24) 3:35.25 8 8 Sofia Morini (54.16)Chiara Tarantino (54.27)Sara Curtis (54.24)Emma Virginia Menicucci (53.84) 3:36.51

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