# Swimming at the 2019 World Aquatics Championships – Women's 4 × 100 metre freestyle relay

The Women's 4 × 100 metre freestyle relay competition at the 2019 World Championships was held on 21 July 2019.

## Records

Prior to the competition, the existing world and championship records were as follows.
| World record | Australia | 3:30.05 | Gold Coast, Australia | 5 April 2018 |
| Competition record | Australia | 3:31.48 | Kazan, Russia | 2 August 2015 |
The following new records were set during this competition.
| Date | Event | Nation | Time | Record |
| 21 July | Final | Australia | 3:30.21 | CR |

## Results
### Heats

The heats were held at 12:21.
| Rank | Heat | Lane | Nation | Swimmers | Time | Notes |
| 1 | 2 | 4 | Australia | Cate Campbell (52.44) Brianna Throssell (53.66) Madison Wilson (53.90) Bronte Campbell (53.39) | 3:33.39 | Q |
| 2 | 2 | 5 | Canada | Kayla Sanchez (53.61) Penny Oleksiak (52.75) Rebecca Smith (54.37) Maggie MacNeil (54.00) | 3:34.73 | Q |
| 3 | 2 | 1 | Sweden | Michelle Coleman (54.33) Sarah Sjöström (51.91) Hanna Eriksson (55.70) Louise Hansson (54.09) | 3:36.03 | Q |
| 4 | 1 | 4 | United States | Allison Schmitt (55.04) Abbey Weitzeil (53.07) Margo Geer (53.61) Lia Neal (54.41) | 3:36.13 | Q |
| 5 | 2 | 3 | Japan | Rika Omoto (54.21) Tomomi Aoki (54.01) Aya Sato (53.98 ) Rio Shirai (53.97) | 3:36.17 | Q, NR |
| 6 | 1 | 5 | Netherlands | Kim Busch (55.39) Femke Heemskerk (52.60) Kira Toussaint (54.32) Ranomi Kromowidjojo (54.31) | 3:36.62 | Q |
| 7 | 1 | 3 | China | Zhu Menghui (54.56) Wu Qingfeng (54.99) Wang Jingzhuo (54.76) Yang Junxuan (53.58) | 3:37.89 | Q |
| 8 | 1 | 2 | Germany | Annika Bruhn (55.35) Reva Foos (54.85) Julia Mrozinski (54.28) Jessica Steiger (54.07) | 3:38.55 | Q |
| 9 | 1 | 6 | Russia | Daria S. Ustinova (54.55) Maria Kameneva (53.99) Sofya Lobova (55.55) Arina Openysheva (54.85) | 3:38.94 | |
| 10 | 1 | 7 | Hong Kong | Camille Cheng (55.23) Siobhán Haughey (52.89) Ho Nam Wai (56.64) Tam Hoi Lam (55.64) | 3:40.40 | |
| 11 | 1 | 0 | Czech Republic | Barbora Seemanová (55.09) Anna Kolářová (55.93) Simona Kubová (55.50) Anika Apostalon (54.26) | 3:40.78 | NR |
| 12 | 2 | 7 | Poland | Katarzyna Wilk (55.03) Alicja Tchórz (55.00) Dominika Kossakowska (55.80) Aleksandra Polańska (55.18) | 3:41.01 | |
| 13 | 2 | 2 | Switzerland | Nina Kost (56.03) Alexandra Touretski (55.95) Maria Ugolkova (54.22) Noémi Girardet (55.10) | 3:41.30 | |
| 14 | 2 | 6 | Denmark | Julie Kepp Jensen (55.45) Signe Bro (55.97) Jeanette Ottesen (54.85) Emily Gantriis (55.93) | 3:42.20 | |
| 15 | 2 | 0 | South Korea | Lee Kun-a (55.80) Jeong So-eun (55.22) Choi Ji-won (55.97) Jung You-in (55.59) | 3:42.58 | NR |
| 16 | 2 | 8 | Turkey | Selen Özbilen (55.30) Gizem Güvenç (55.63) Viktoriya Zeynep Güneş (55.89) Ekaterina Avramova (56.21) | 3:43.03 | NR |
| 17 | 1 | 1 | Singapore | Quah Ting Wen (55.43) Cherlyn Yeoh (54.96) Christie Chue (56.42) Quah Jing Wen (56.30) | 3:43.11 | NR |
| 18 | 1 | 8 | South Africa | Erin Gallagher (55.17) Tayla Lovemore (56.21) Emma Chelius (55.28) Rebecca Meder (56.69) | 3:43.35 | AF |

### Final

The final was held at 21:33.
| Rank | Lane | Nation | Swimmers | Time | Notes |
| | 4 | Australia | Bronte Campbell (52.85) Brianna Throssell (53.34) Emma McKeon (52.57) Cate Campbell (51.45) | 3:30.21 | CR |
| | 6 | United States | Mallory Comerford (52.98) Abbey Weitzeil (52.66) Kelsi Dahlia (53.46) Simone Manuel (51.92) | 3:31.02 | AM |
| | 5 | Canada | Kayla Sanchez (53.72) Taylor Ruck (52.19) Penny Oleksiak (52.69) Maggie MacNeil (53.18) | 3:31.78 | NR |
| 4 | 7 | Netherlands | Kim Busch (55.23) Ranomi Kromowidjojo (52.92) Kira Toussaint (54.76) Femke Heemskerk (52.41) | 3:35.32 | |
| 5 | 1 | China | Yang Junxuan (53.68) Zhu Menghui (53.39) Wu Qingfeng (54.26) Wang Jingzhuo (54.50) | 3:35.83 | |
| 6 | 3 | Sweden | Sarah Sjöström (52.23) Michelle Coleman (53.88) Louise Hansson (54.33) Sophie Hansson (55.89) | 3:36.33 | |
| 7 | 2 | Japan | Tomomi Aoki (54.62) Aya Sato (53.91) Rio Shirai (54.23) Rika Omoto (54.03) | 3:36.79 | |
| 8 | 8 | Germany | Jessica Steiger (54.59) Julia Mrozinski (55.02) Reva Foos (54.72) Annika Bruhn (54.74) | 3:39.07 | |