Semifinal
dimanche 23 juillet 2017, 18h31 GMT – 18h31 GMT
| Nom | Équipe | Temps | |
|---|---|---|---|
| 1 |  Katinka Hosszú | Hungary | 2′ 7.14″ |
| 2 |  Melanie Margalis | United States | + 1.56″ |
| 3 |  Sydney Pickrem | Canada | + 2.03″ |
| 4 | Siobhan-Marie O'Connor | Great Britain | + 2.58″ |
| 5 | Seo-Yeong Kim | Korea | + 2.72″ |
| 6 | Madisyn Cox | United States | + 2.83″ |
| 7 | Runa Imai | Japan | + 3.01″ |
| 8 |  Yui Ohashi | Japan | + 3.31″ |
| 9 | Hannah Miley | Great Britain | + 4.06″ |
| 10 | Joanna Maranhão | Brazil | + 4.1″ |
| 11 | Erika Seltenreich-Hodgson | Canada | + 4.47″ |
| 12 | Zsuzsanna Jakabos | Hungary | + 4.78″ |
| 13 |  Maria Ugolkova | Switzerland | + 5.11″ |
| 14 | Yuliya Efimova | Russia | + 5.74″ |
| 15 | Shiwen Ye | China | + 5.87″ |
| 16 | Kotuku Ngawati | Australia | + 6.93″ |