Final
lundi 24 juillet 2017, 17h40 GMT – 17h40 GMT
| Nom | Équipe | Temps | |
|---|---|---|---|
| 1 |  Sarah Sjöström | Sweden | 55.53″ |
| 2 |  Emma McKeon | Australia | + 0.65″ |
| 3 |  Kelsi Dahlia | United States | + 0.84″ |
| 4 |  Penny Oleksiak | Canada | + 1.41″ |
| 5 | Se-Hyeon An | Korea | + 1.54″ |
| 6 |  Rikako Ikee | Japan | + 1.55″ |
| 7 | Svetlana Chimrova | Russia | + 1.71″ |
| 8 |  Yufei Zhang | China | + 1.98″ |