Heat 10
jeudi 25 juillet 2019, 03h00 GMT – 03h00 GMT
| Nom | Équipe | Temps | |
|---|---|---|---|
| 1 |  Sarah Sjöström | Sweden | 53.11″ |
| 2 |  Cate Campbell | Australia | + 0.25″ |
| 3 |  Mallory Comerford | United States | + 0.46″ |
| 4 | Freya Anderson | Great Britain | + 0.66″ |
| 5 | Siobhán Haughey | Hong Kong, China | + 0.7″ |
| 6 |  Béryl Gastaldello | France | + 0.84″ |
| 7 | Kasia Wasick | Poland | + 1.57″ |
| 8 | Neža Klancar | Slovenia | + 1.77″ |
| 9 |  Rika Omoto | Japan | + 1.78″ |
| 10 |  Anika Apostalon | Czech Republic | + 2.4″ |