# Swimming at the 2024 Summer Olympics – Women's 4 × 100 metre freestyle relay

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. Since an Olympic size swimming pool is 50 metres long, each swimmer had to swim two lengths of the pool.

## Records

Prior to this competition, the existing world and Olympic records were as follows.
| World record | Australia (AUS)Mollie O'Callaghan (52.08)Shayna Jack (51.69)Meg Harris (52.29)Emma McKeon (51.90) | 3:27.96 | Fukuoka, Japan | 23 July 2023 |
| Olympic record | Australia (AUS)Bronte Campbell (53.01)Meg Harris (53.09)Emma McKeon (51.35)Cate Campbell (52.24) | 3:29.69 | Tokyo, Japan | 25 July 2021 |
The following record was established during the competition:
| Date | Round | Name | Nationality | Time | Record |
| 27 July | Final | Mollie O'Callaghan (52.24) Shayna Jack (52.35) Emma McKeon (52.39) Meg Harris (51.94) | Australia | 3:28.92 | OR |

## Qualification

For the relays, a maximum of 16 qualifying teams in each event must be permitted to accumulate a total of 112 relay teams; each NOC may enter only one team. The top three teams in each relay race at the 2023 World Aquatics Championships in Fukuoka, Japan will directly book a slot for their corresponding event at the Olympics, while the remaining thirteen vying for qualification per relay race must attain their best time from the heats and finals at the combined 2023 and 2024 meet in Doha.

## Competition format

The competition consists of two rounds: heats and a final. The teams with the best 8 times in the heats advance to the final. Swim-offs are used as necessary to break ties for advancement to the next round (final).

## Schedule

All times are Central European Summer Time (UTC+2)
| Date | Time | Round |
| 27 July 2024 | 12:15 | Heats |
| 27 July 2024 | 21:34 | Final |

## Results
### Heats

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

### Final

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