# Swimming at the 2024 World Aquatics Championships – Women's 4 × 100 metre freestyle relay

The Women's 4 × 100 metre freestyle relay competition at the 2024 World Aquatics Championships was held on 11 February 2024.

## Records

Prior to the competition, the existing world and championship records were as follows.
| World record | Australia | 3:27.96 | Fukuoka, Japan | 23 July 2023 |
| Competition record | Australia | 3:27.96 | Fukuoka, Japan | 23 July 2023 |

## Results
### Heats

The heats were started on 11 February at 11:32.
| Rank | Heat | Lane | Nation | Swimmers | Time | Notes |
| 1 | 2 | 4 | Australia | Alexandria Perkins (55.06) Jaclyn Barclay (55.51) Abbey Harkin (54.93) Shayna Jack (52.83) | 3:38.33 | Q |
| 2 | 2 | 3 | Italy | Sofia Morini (55.02) Costanza Cocconcelli (55.18) Emma Virginia Menicucci (55.12) Chiara Tarantino (53.88) | 3:39.20 | Q |
| 3 | 1 | 5 | Canada | Rebecca Smith (54.88) Sarah Fournier (55.12) Ella Jansen (55.67) Taylor Ruck (54.08) | 3:39.75 | Q |
| 4 | 2 | 5 | Netherlands | Kim Busch (55.63) Milou van Wijk (55.64) Janna van Kooten (54.74) Kira Toussaint (54.41) | 3:40.42 | Q |
| 5 | 2 | 7 | Poland | Zuzanna Famulok (55.68) Julia Maik (55.39) Aleksandra Polańska (55.73) Kornelia Fiedkiewicz (54.63) | 3:41.43 | Q |
| 6 | 1 | 3 | Brazil | Ana Carolina Vieira (55.60) Stephanie Balduccini (54.47) Maria Fernanda Costa (55.48) Aline Rodrigues (56.12) | 3:41.67 | Q |
| 7 | 1 | 4 | China | Lyu Yue (55.48) Ma Yonghui (56.02) Gong Zhenqi (56.06) Ai Yanhan (54.19) | 3:41.75 | Q |
| 8 | 2 | 1 | Slovenia | Neža Klančar (55.36) Janja Šegel (54.43) Katja Fain (55.94) Hana Sekuti (56.38) | 3:42.11 | Q |
| 9 | 2 | 6 | Hong Kong | Tam Hoi Lam (55.53) Camille Cheng (55.22) Stephanie Au (56.74) Li Sum Yiu (54.98) | 3:42.47 | |
| 10 | 1 | 6 | Ireland | Erin Riordan (56.15) Grace Davison (55.81) Maria Godden (57.06) Victoria Catterson (54.93) | 3:43.95 | |
| 11 | 2 | 2 | Lithuania | Rūta Meilutytė (56.07) Sylvia Statkevicius (56.27) Patricija Geriksonaitė (57.32) Smilte Plytnykaitė (55.33) | 3:44.99 | |
| 12 | 1 | 2 | Philippines | Kayla Sanchez (55.04) Jasmine Alkhaldi (57.51) Xiandi Chua (57.48) Teia Salvino (56.90) | 3:46.93 | |
| 13 | 1 | 7 | Serbia | Katarina Milutinović (55.61) Nina Stanisavljević (55.83) Jana Marković (57.19) Martina Bukvić (58.49) | 3:47.12 | |
| 14 | 1 | 1 | Chinese Taipei | Huang Mei-chien (57.39) Wu Yi-en (1:02.92) Lin Pei-wun (1:00.65) Applejean Gwinn (58.42) | 3:59.38 | |

### Final

The final was started at 20:21.
| Rank | Lane | Nation | Swimmers | Time | Notes |
| | 6 | Netherlands | Kim Busch (55.21) Janna van Kooten (55.24) Kira Toussaint (53.81) Marrit Steenbergen (52.35) | 3:36.61 | |
| | 4 | Australia | Brianna Throssell (54.29) Alexandria Perkins (55.02) Abbey Harkin (54.98) Shayna Jack (52.64) | 3:36.93 | |
| | 3 | Canada | Rebecca Smith (54.93) Sarah Fournier (55.28) Katerine Savard (54.48) Taylor Ruck (53.26) | 3:37.95 | |
| 4 | 2 | Poland | Katarzyna Wasick (54.12) NR Kornelia Fiedkiewicz (54.23) Zuzanna Famulok (55.04) Julia Maik (55.26) | 3:38.65 | NR |
| 5 | 5 | Italy | Chiara Tarantino (54.60) Sofia Morini (54.49) Emma Virginia Menicucci (54.95) Costanza Cocconcelli (54.63) | 3:38.67 | |
| 6 | 7 | Brazil | Ana Carolina Vieira (55.29) Stephanie Balduccini (54.35) Maria Fernanda Costa (55.46) Aline Rodrigues (55.46) | 3:40.56 | |
| 7 | 1 | China | Ai Yanhan (54.68) Ma Yonghui (55.67) Gong Zhenqi (55.71) Lyu Yue (55.05) | 3:41.11 | |
| 8 | 8 | Slovenia | Neža Klančar (55.15) Janja Šegel (54.78) Katja Fain (55.75) Hana Sekuti (56.04) | 3:41.72 | |