Heats
dimanche 30 juillet 2017, 10h00 GMT – 10h00 GMT
| Nom | Équipe | Temps | |
|---|---|---|---|
| 1 |  Katinka Hosszú | Hungary | 4′ 33.9″ |
| 2 |  Mireia Belmonte | Spain | + 1.39″ |
| 3 |  Elizabeth Beisel | United States | + 2.28″ |
| 4 |  Sydney Pickrem | Canada | + 2.35″ |
| 5 | Sakiko Shimizu | Japan | + 2.53″ |
| 6 | Leah Smith | United States | + 3.04″ |
| 7 |  Yui Ohashi | Japan | + 3.07″ |
| 8 | Hannah Miley | Great Britain | + 3.24″ |
| 9 | Seo-Yeong Kim | Korea | + 5.9″ |
| 10 | Thi Anh Vien Nguyen | Vietnam | + 6.49″ |
| 11 | Joanna Maranhão | Brazil | + 7.39″ |
| 12 | Zsuzsanna Jakabos | Hungary | + 7.5″ |
| 13 | Min Zhou | China | + 8.36″ |
| 14 | Viktoria Günes | Turkey | + 8.37″ |
| 15 | Shiwen Ye | China | + 9.5″ |
| 16 |  Kaylee McKeown | Australia | + 9.71″ |
| 17 | Victoria Kaminskaya | Portugal | + 11.06″ |
| 18 | Barbora Závadová | Czech Republic | + 12.85″ |
| 19 | Mary-Sophie Harvey | Canada | + 12.98″ |
| 20 | Abbie Wood | Great Britain | + 13.4″ |
| 21 | Monika Gonzalez Hermosillo Holtz | Mexico | + 14.1″ |
| 22 |  Anja Crevar | Serbia | + 14.63″ |
| 23 | Helena Gasson | New Zealand | + 15.45″ |
| 24 | Virginia Bardach | Argentina | + 19.32″ |
| 25 | Ilektra Varvara Lebl | Greece | + 23.05″ |
| 26 | Azzahra Permatahani | Indonesia | + 23.1″ |
| 27 | Sara Nysted | Faroe Islands | + 47.31″ |
| Sayani Ghosh | India | DNS |