# Swimming at the 2023 World Aquatics Championships – Women's 4 × 100 metre freestyle relay

The women's 4 × 100 metre freestyle relay competition at the 2023 World Aquatics Championships was held on 23 July 2023.

## Records

Prior to the competition, the existing world and championship records were as follows:
| World record | Australia Bronte Campbell (53.01) Meg Harris (53.09) Emma McKeon (51.35) Cate Campbell (52.24) | 3:29.69 | Tokyo, Japan | 25 July 2021 |
| Competition record | Australia Bronte Campbell (52.85) Brianna Throssell (53.34) Emma McKeon (52.57) Cate Campbell (51.45) | 3:30.21 | Gwangju, South Korea | 21 July 2019 |
The following new records were set during this competition:
| Date | Event | Nation | Swimmers | Time | Record |
| 23 July | Final | Australia | Mollie O'Callaghan (52.08) Shayna Jack (51.69) Meg Harris (52.29) Emma McKeon (51.90) | 3:27.96 | WR |

## Results
### Heats

The heats were held at 13:03.
| Rank | Heat | Lane | Nation | Swimmers | Time | Notes |
| 1 | 2 | 4 | Australia | Shayna Jack (52.28) Brianna Throssell (53.95) Meg Harris (52.55) Madison Wilson (52.74) | 3:31.52 | Q |
| 2 | 2 | 5 | United States | Torri Huske (53.55) Olivia Smoliga (52.91) Maxine Parker (54.34) Abbey Weitzeil (52.54) | 3:33.34 | Q |
| 3 | 2 | 6 | Netherlands | Kim Busch (54.66) Milou van Wijk (54.84) Sam van Nunen (53.87) Marrit Steenbergen (52.13) | 3:35.50 | Q |
| 4 | 2 | 3 | Great Britain | Anna Hopkin (54.10) Lucy Hope (53.79) Abbie Wood (54.64) Freya Anderson (53.45) | 3:35.98 | Q |
| 5 | 1 | 5 | China | Yang Junxuan (54.20) Ai Yanhan (54.09) Zhu Menghui (54.56) Wu Qingfeng (53.41) | 3:36.26 | Q |
| 6 | 1 | 3 | Sweden | Sarah Sjöström (52.89) Michelle Coleman (53.20) Sara Junevik (54.96) Sofia Åstedt (55.24) | 3:36.29 | Q |
| 7 | 1 | 4 | Canada | Maggie Mac Neil (53.77) Mary-Sophie Harvey (53.99) Katerine Savard (54.47) Taylor Ruck (54.16) | 3:36.39 | Q |
| 8 | 2 | 8 | Japan | Rikako Ikee (54.51) Nagisa Ikemoto (53.96) Yume Jinno (55.02) Rio Shirai (54.22) | 3:37.71 | Q |
| 9 | 1 | 6 | Italy | Chiara Tarantino (54.95) Costanza Cocconcelli (54.14) Emma Menicucci (54.50) Sofia Morini (54.34) | 3:37.93 | |
| 10 | 2 | 7 | France | Béryl Gastaldello (54.50) Lison Nowaczyk (54.36) Mary-Ambre Moluh (55.05) Assia Touati (54.61) | 3:38.52 | |
| 11 | 2 | 2 | Brazil | Ana Carolina Vieira (54.46) Stephanie Balduccini (53.92) Celine Souza Bispo (55.20) Giovanna Diamante (55.41) | 3:38.99 | |
| 12 | 1 | 9 | Hong Kong | Camille Cheng (56.05) Siobhán Haughey (52.59) Tam Hoi Lam (55.36) Stephanie Au (55.93) | 3:39.93 | NR |
| 13 | 1 | 2 | Hungary | Petra Senánszky (55.10) Dóra Molnár (55.41) Lilla Minna Ábrahám (54.38) Nikolett Pádár (55.13) | 3:40.02 | |
| 14 | 1 | 0 | Denmark | Signe Bro (55.39) Julie Kepp Jensen (54.58) Emilie Beckmann (55.75) Helena Rosendahl Bach (55.49) | 3:41.21 | |
| 15 | 1 | 8 | Ireland | Mona McSharry (55.98) Danielle Hill (55.51) Erin Riordan (55.50) Victoria Catterson (54.76) | 3:41.75 | NR |
| 16 | 2 | 1 | Spain | Carmen Weiler (55.58) Ainhoa Campabadal (54.98) África Zamorano (55.61) Paula Juste (56.36) | 3:42.53 | |
| 17 | 1 | 7 | South Africa | Aimee Canny (54.95) Emma Chelius (56.28) Milla Drakopoulos (57.85) Trinity Hearne (56.46) | 3:45.54 | |
| 18 | 2 | 0 | Thailand | Kamonchanok Kwanmuang (57.70) Saovanee Boonamphai (59.86) Phiangkhwan Pawapotako (1:01.10) Jenjira Srisaard (58.18) | 3:56.84 | |
| | 1 | 1 | Singapore | DNS | DNS | DNS |
| | 2 | 9 | Mexico | DNS | DNS | DNS |

### Final

The final was held at 21:32.
| Rank | Lane | Nation | Swimmers | Time | Notes |
| | 4 | Australia | Mollie O'Callaghan (52.08) Shayna Jack (51.69) Meg Harris (52.29) Emma McKeon (51.90) | 3:27.96 | WR |
| | 5 | United States | Gretchen Walsh (54.06) Abbey Weitzeil (52.71) Olivia Smoliga (52.88) Kate Douglass (52.28) | 3:31.93 | |
| | 2 | China | Cheng Yujie (53.39) Yang Junxuan (53.53) Wu Qingfeng (52.64) Zhang Yufei (52.84) | 3:32.40 | AS |
| 4 | 6 | Great Britain | Anna Hopkin (53.67) Lucy Hope (53.53) Abbie Wood (54.19) Freya Anderson (52.51) | 3:33.90 | NR |
| 5 | 7 | Sweden | Sarah Sjöström (52.24) Michelle Coleman (53.11) Sara Junevik (54.71) Louise Hansson (54.11) | 3:34.17 | |
| 6 | 3 | Netherlands | Kim Busch (55.05) Sam van Nunen (54.13) Milou van Wijk (54.39) Marrit Steenbergen (51.84) | 3:35.41 | |
| 7 | 1 | Canada | Summer McIntosh (54.99) Maggie Mac Neil (53.07) Mary-Sophie Harvey (54.57) Taylor Ruck (53.99) | 3:36.62 | |
| 8 | 8 | Japan | Rikako Ikee (55.09) Nagisa Ikemoto (53.62) Yume Jinno (55.26) Rio Shirai (54.64) | 3:38.61 | |