| Competition | 2023 World Aquatics Championships | 
|---|---|
| Venue | Fukuoka | 
| Held | 23 July 2023 | 
| Status | Medal | 
| Competitors | 80 | 
| Countries | 18 | 
The first three Nations (AUS, USA, and CHN) qualified for the 2024 Paris Olympics.
| Pos | Athlete(s) | Country | Preliminary Round | Final | ||
|---|---|---|---|---|---|---|
| 🥇 | Australia | 3:31.52 (1 h2) | 3:27.96 (1 F) | |||
| Mollie O'Callaghan | — | 52.08 | ||||
| Shayna Jack | 52.28 | 51.69 | ||||
| Meg Harris | 52.55 | 52.29 | ||||
| Emma McKeon | — | 51.90 | ||||
| Brianna Throssell | 53.95 | — | * | |||
| Madi Wilson | 52.74 | — | * | |||
| 🥈 | United States | 3:33.34 (2 h2) | 3:31.93 (2 F) | |||
| Gretchen Walsh | — | 54.06 | ||||
| Abbey Weitzeil | 52.54 | 52.71 | ||||
| Olivia Smoliga | 52.91 | 52.88 | ||||
| Kate Douglass | — | 52.28 | ||||
| Torri Huske | 53.55 | — | * | |||
| Maxine Parker | 54.34 | — | * | |||
| 🥉 | China | 3:36.26 (5 h1) | 3:32.40 (3 F) | |||
| Cheng Yujie | — | 53.39 | ||||
| Yang Junxuan | 54.20 | 53.53 | ||||
| Wu Qingfeng | 53.41 | 52.64 | ||||
| Zhang Yufei | — | 52.84 | ||||
| Ai Yanhan | 54.09 | — | * | |||
| Zhu Menghui | 54.56 | — | * | |||
| 4 | Great Britain | 3:35.98 (4 h2) | 3:33.90 (4 F) | |||
| Anna Hopkin | 54.10 | 53.67 | ||||
| Lucy Hope | 53.79 | 53.53 | ||||
| Abbie Wood | 54.64 | 54.19 | ||||
| Freya Anderson | 53.45 | 52.51 | ||||
| 5 | Sweden | 3:36.29 (6 h1) | 3:34.17 (5 F) | |||
| Sarah Sjöström | 52.89 | 52.24 | ||||
| Michelle Coleman | 53.20 | 53.11 | ||||
| Sara Junevik | 54.96 | 54.71 | ||||
| Louise Hansson | — | 54.11 | ||||
| Sofia Åstedt | 55.24 | — | * | |||
| 6 | Netherlands | 3:35.50 (3 h2) | 3:35.41 (6 F) | |||
| Kim Busch | 54.66 | 55.05 | ||||
| Sam van Nunen | 53.87 | 54.13 | ||||
| Milou Van Wijk | 54.84 | 54.39 | ||||
| Marrit Steenbergen | 52.13 | 51.84 | ||||
| 7 | Canada | 3:36.39 (7 h1) | 3:36.62 (7 F) | |||
| Summer McIntosh | — | 54.99 | ||||
| Maggie Mac Neil | 53.77 | 53.07 | ||||
| Mary-Sophie Harvey | 53.99 | 54.57 | ||||
| Taylor Ruck | 54.16 | 53.99 | ||||
| Katerine Savard | 54.47 | — | * | |||
| 8 | Japan | 3:37.71 (8 h2) | 3:38.61 (8 F) | |||
| Rikako Ikee | 54.51 | 55.09 | ||||
| Nagisa Ikemoto | 53.96 | 53.62 | ||||
| Yume Jinno | 55.02 | 55.26 | ||||
| Rio Shirai | 54.22 | 54.64 | ||||
| 9 | Italy | 3:37.93 (9 h1) | — | |||
| Chiara Tarantino | 54.95 | — | ||||
| Costanza Cocconcelli | 54.14 | — | ||||
| Emma Menicucci | 54.50 | — | ||||
| Sofia Morini | 54.34 | — | ||||
| 10 | France | 3:38.52 (10 h2) | — | |||
| Béryl Gastaldello | 54.50 | — | ||||
| Lison Nowaczyk | 54.36 | — | ||||
| Mary-Ambre Moluh | 55.05 | — | ||||
| Assia Touati | 54.61 | — | ||||
| 11 | Brazil | 3:38.99 (11 h2) | — | |||
| Ana Vieira | 54.46 | — | ||||
| Stephanie Balduccini | 53.92 | — | ||||
| Celine Bispo | 55.20 | — | ||||
| Giovanna Diamante | 55.41 | — | ||||
| 12 | Hong Kong | 3:39.93 (12 h1) | — | |||
| Camille Lily Cheng | 56.05 | — | ||||
| Siobhán Haughey | 52.59 | — | ||||
| Tam Hoi Lam | 55.36 | — | ||||
| Stephanie Au | 55.93 | — | ||||
| 13 | Hungary | 3:40.02 (13 h1) | — | |||
| Petra Senánszky | 55.10 | — | ||||
| Dóra Molnár | 55.41 | — | ||||
| Minna Ábrahám | 54.38 | — | ||||
| Nikolett Pádár | 55.13 | — | ||||
| 14 | Denmark | 3:41.21 (14 h1) | — | |||
| Signe Bro | 55.39 | — | ||||
| Julie Jensen | 54.58 | — | ||||
| Emilie Beckmann | 55.75 | — | ||||
| Helena Bach | 55.49 | — | ||||
| 15 | Ireland | 3:41.75 (15 h1) | — | |||
| Mona McSharry | 55.98 | — | ||||
| Danielle Hill | 55.51 | — | ||||
| Erin Riordan | 55.50 | — | ||||
| Victoria Catterson | 54.76 | — | ||||
| 16 | Spain | 3:42.53 (16 h2) | — | |||
| Carmen Weiler | 55.58 | — | ||||
| Ainhoa Campabadal | 54.98 | — | ||||
| África Zamorano | 55.61 | — | ||||
| Paula Juste | 56.36 | — | ||||
| 17 | South Africa | 3:45.54 (17 h1) | — | |||
| Aimee Canny | 54.95 | — | ||||
| Emma Chelius | 56.28 | — | ||||
| Milla Drakopoulos | 57.85 | — | ||||
| Trinity Hearne | 56.46 | — | ||||
| 18 | Thailand | 3:56.84 (18 h2) | — | |||
| Kamonchanok Kwanmuang | 57.70 | — | ||||
| Saovanee Boonamphai | 59.86 | — | ||||
| Phiangkhwan Pawapotako | 1:01.10 | — | ||||
| Jenjira Srisa-Ard | 58.18 | — | ||||
| DNS | Singapore | — (DNS h1) | — | |||
| DNS | Mexico | — (DNS h2) | — | 
| Pos | Athlete(s) | Country | Mark | |
|---|---|---|---|---|
| 1 | Australia | 3:27.96 | ||
| Mollie O'Callaghan | 52.08 | |||
| Shayna Jack | 51.69 | |||
| Meg Harris | 52.29 | |||
| Emma McKeon | 51.90 | |||
| Brianna Throssell | — | |||
| Madi Wilson | — | |||
| 2 | United States | 3:31.93 | ||
| Gretchen Walsh | 54.06 | |||
| Abbey Weitzeil | 52.71 | |||
| Olivia Smoliga | 52.88 | |||
| Kate Douglass | 52.28 | |||
| Torri Huske | — | |||
| Maxine Parker | — | |||
| 3 | China | 3:32.40 | ||
| Cheng Yujie | 53.39 | |||
| Yang Junxuan | 53.53 | |||
| Wu Qingfeng | 52.64 | |||
| Zhang Yufei | 52.84 | |||
| Ai Yanhan | — | |||
| Zhu Menghui | — | |||
| 4 | Great Britain | 3:33.90 | ||
| Anna Hopkin | 53.67 | |||
| Lucy Hope | 53.53 | |||
| Abbie Wood | 54.19 | |||
| Freya Anderson | 52.51 | |||
| 5 | Sweden | 3:34.17 | ||
| Sarah Sjöström | 52.24 | |||
| Michelle Coleman | 53.11 | |||
| Sara Junevik | 54.71 | |||
| Louise Hansson | 54.11 | |||
| Sofia Åstedt | — | |||
| 6 | Netherlands | 3:35.41 | ||
| Kim Busch | 55.05 | |||
| Sam van Nunen | 54.13 | |||
| Milou Van Wijk | 54.39 | |||
| Marrit Steenbergen | 51.84 | |||
| 7 | Canada | 3:36.62 | ||
| Summer McIntosh | 54.99 | |||
| Maggie Mac Neil | 53.07 | |||
| Mary-Sophie Harvey | 54.57 | |||
| Taylor Ruck | 53.99 | |||
| Katerine Savard | — | |||
| 8 | Japan | 3:38.61 | ||
| Rikako Ikee | 55.09 | |||
| Nagisa Ikemoto | 53.62 | |||
| Yume Jinno | 55.26 | |||
| Rio Shirai | 54.64 |