2016 FINA World Swimming Championships (25 m) – Women's 400 metre individual medley
The Women's 400 metre individual medley competition of the 2016 FINA World Swimming Championships was held on 7 December 2016.Records
Prior to the competition, the existing world and championship records were as follows.
Results
Heats
The heats were held at 11:49.
| Rank | Heat | Lane | Name | Nationality | Time | Notes |
| 1 | 3 | 4 | Katinka Hosszú | | 4:25.03 | Q |
| 2 | 2 | 2 | Ella Eastin | | 4:29.64 | Q |
| 3 | 3 | 2 | Mireia Belmonte | | 4:31.14 | Q |
| 4 | 2 | 4 | Hannah Miley | | 4:31.48 | Q |
| 5 | 3 | 3 | Barbora Závadová | | 4:32.06 | Q |
| 6 | 1 | 6 | Nguyễn Thị Ánh Viên | | 4:32.19 | Q, NR |
| 7 | 3 | 5 | Yui Ohashi | | 4:32.20 | Q |
| 8 | 3 | 6 | Madisyn Cox | | 4:34.50 | Q |
| 9 | 2 | 3 | Abbie Wood | | 4:34.78 | |
| 10 | 2 | 7 | Sarah Darcel | | 4:35.66 | |
| 11 | 2 | 6 | Wakaba Tsuyuuchi | | 4:37.66 | |
| 12 | 3 | 7 | Fantine Lesaffre | | 4:38.18 | |
| 13 | 2 | 5 | Li Bingjie | | 4:40.03 | |
| 14 | 2 | 0 | Maxine Wolters | | 4:40.77 | |
| 15 | 3 | 1 | Victoria Kaminskaya | | 4:42.62 | |
| 16 | 3 | 0 | Martina van Berkel | | 4:43.43 | |
| 17 | 1 | 3 | Ajna Késely | | 4:44.40 | |
| 18 | 3 | 8 | Florencia Perotti | | 4:45.61 | |
| 19 | 2 | 8 | Phiangkhwan Pawapotako | | 4:45.71 | NR |
| 20 | 2 | 1 | Kristýna Horská | | 4:47.22 | |
| 21 | 2 | 9 | Hamida Rania Nefsi | | 4:49.68 | |
| 22 | 3 | 9 | Souad Nefissa Cherouati | | 4:57.37 | |
| 23 | 1 | 4 | Alania Suttie | | 5:09.44 | NR |
| 24 | 1 | 5 | Cecilia Medina | | 5:38.87 | |
Final
The final was held at 19:18.
| Rank | Lane | Name | Nationality | Time | Notes |
| 4 | Katinka Hosszú | | 4:21.67 | |
| 5 | Ella Eastin | | 4:27.74 | |
| 8 | Madisyn Cox | | 4:27.78 | |
| 4 | 6 | Hannah Miley | | 4:27.86 | |
| 5 | 3 | Mireia Belmonte | | 4:32.98 | |
| 6 | 1 | Yui Ohashi | | 4:33.07 | |
| 7 | 2 | Barbora Závadová | | 4:37.79 | |
| 7 | Nguyễn Thị Ánh Viên | | | |
