The women's 400 metre individual medley event at the 2024 World Aquatics Swimming Championships (25 m) was held on 14 December 2024 at the Duna Arena in Budapest, Hungary.

Records Prior to the competition, the existing world and championship records were as follows:

The following record was established during the competition: DateEventNameNationalityTimeRecord14 December Final Summer McIntosh 4:15.48

Results Heats The heats were started at 9:02. Rank Heat Lane Name Nationality Time Notes 1 4 4 Katie Grimes 4:24.74 Q 2 3 4 Summer McIntosh 4:25.86 Q 3 4 5 Mary-Sophie Harvey 4:27.01 Q 4 3 5 Abbie Wood 4:29.21 Q 5 3 3 Ellen Walshe 4:29.78 Q 6 4 3 Tara Kinder 4:30.17 Q 7 4 6 Kayla Hardy 4:31.35 Q 8 3 2 Emma Carrasco 4:32.20 Q 9 3 7 Ayami Suzuki 4:33.52 R 10 2 2 Kristen Romano 4:33.56 R, NR 11 4 0 Lilla Bognar 4:33.77 12 3 1 Zhou Yanjun 4:34.08 13 2 4 Misuzu Nagaoka 4:34.57 14 4 1 Vivien Jackl 4:35.61 15 4 8 Laura Cabanes 4:37.33 16 4 7 Boglárka Kapás 4:37.46 17 2 5 Clara Rybak-Andersen 4:39.09 18 2 1 Katja Fain 4:39.26 19 4 2 Viktoriia Blinova Neutral Athletes B 4:40.17 20 3 6 Zheng Huiyu 4:41.30 21 3 9 Gina McCarthy 4:41.85 22 4 9 Nikoleta Trníková 4:41.87 23 2 6 Xiandi Chua 4:43.85 NR 24 2 8 Lee Hee-eun 4:44.78 25 2 7 Jinjutha Pholjamjumrus 4:45.44 26 1 3 Kinga Paradowska 4:45.70 27 2 3 Ng Lai Wa 4:45.79 28 1 5 Nicole Frank 4:46.81 NR 29 3 8 Applejean Gwinn 4:51.26 30 1 4 Karin Belbeisi 4:56.52 2 0 Inana Soleman Did not start 3 0 Gabrielle Roncatto

Final The final was held at 18:30.

Rank Lane Name Nationality Time Notes 4 Summer McIntosh 4:15.48 4 Katie Grimes 4:20.14 NR 6 Abbie Wood 4:24.34 4 3 Mary-Sophie Harvey 4:26.09 5 2 Ellen Walshe 4:29.86 6 1 Kayla Hardy 4:30.01 7 7 Tara Kinder 4:30.87 8 8 Emma Carrasco 4:31.18

References