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.The following new records were set during this competition.
| Date | Event | Nation | Time | Record |
| 21 July | Final | 3:30.21 | CR |
Results
Heats
The heats were held at 12:21.| Rank | Heat | Lane | Nation | Swimmers | Time | Notes |
| 1 | 2 | 4 | Cate Campbell Brianna Throssell Madison Wilson Bronte Campbell | 3:33.39 | Q | |
| 2 | 2 | 5 | Kayla Sanchez Penny Oleksiak Rebecca Smith Maggie MacNeil | 3:34.73 | Q | |
| 3 | 2 | 1 | Michelle Coleman Sarah Sjöström Hanna Eriksson Louise Hansson | 3:36.03 | Q | |
| 4 | 1 | 4 | Allison Schmitt Abbey Weitzeil Margo Geer Lia Neal | 3:36.13 | Q | |
| 5 | 2 | 3 | Rika Omoto Tomomi Aoki Aya Sato Rio Shirai | 3:36.17 | Q, NR | |
| 6 | 1 | 5 | Kim Busch Femke Heemskerk Kira Toussaint Ranomi Kromowidjojo | 3:36.62 | Q | |
| 7 | 1 | 3 | Zhu Menghui Wu Qingfeng Wang Jingzhuo Yang Junxuan | 3:37.89 | Q | |
| 8 | 1 | 2 | Annika Bruhn Reva Foos Julia Mrozinski Jessica Steiger | 3:38.55 | Q | |
| 9 | 1 | 6 | Daria S. Ustinova Maria Kameneva Sofya Lobova Arina Openysheva | 3:38.94 | ||
| 10 | 1 | 7 | Camille Cheng Siobhan Haughey Ho Nam Wai Tam Hoi Lam | 3:40.40 | ||
| 11 | 1 | 0 | Barbora Seemanová Anna Kolářová Simona Kubová Anika Apostalon | 3:40.78 | NR | |
| 12 | 2 | 7 | Katarzyna Wilk Alicja Tchórz Dominika Kossakowska Aleksandra Polańska | 3:41.01 | ||
| 13 | 2 | 2 | Nina Kost Alexandra Touretski Maria Ugolkova Noémi Girardet | 3:41.30 | ||
| 14 | 2 | 6 | Julie Kepp Jensen Signe Bro Jeanette Ottesen Emily Gantriis | 3:42.20 | ||
| 15 | 2 | 0 | Lee Kun-a Jeong So-eun Choi Ji-won Jung You-in | 3:42.58 | NR | |
| 16 | 2 | 8 | Selen Özbilen Gizem Güvenç Viktoriya Zeynep Güneş Ekaterina Avramova | 3:43.03 | NR | |
| 17 | 1 | 1 | Quah Ting Wen Cherlyn Yeoh Christie Chue Quah Jing Wen | 3:43.11 | NR | |
| 18 | 1 | 8 | Erin Gallagher Tayla Lovemore Emma Chelius Rebecca Meder | 3:43.35 | AF |
Final
The final was held at 21:33.| Rank | Lane | Nation | Swimmers | Time | Notes |
| 4 | Bronte Campbell Brianna Throssell Emma McKeon Cate Campbell | 3:30.21 | CR | ||
| 6 | Mallory Comerford Abbey Weitzeil Kelsi Dahlia Simone Manuel | 3:31.02 | AM | ||
| 5 | Kayla Sanchez Taylor Ruck Penny Oleksiak Maggie MacNeil | 3:31.78 | NR | ||
| 4 | 7 | Kim Busch Ranomi Kromowidjojo Kira Toussaint Femke Heemskerk | 3:35.32 | ||
| 5 | 1 | Yang Junxuan Zhu Menghui Wu Qingfeng Wang Jingzhuo | 3:35.83 | ||
| 6 | 3 | Sarah Sjöström Michelle Coleman Louise Hansson Sophie Hansson | 3:36.33 | ||
| 7 | 2 | Tomomi Aoki Aya Sato Rio Shirai Rika Omoto | 3:36.79 | ||
| 8 | 8 | Jessica Steiger Julia Mrozinski Reva Foos Annika Bruhn | 3:39.07 |