Heat 4
lundi 7 août 2017, 20h30 GMT – 20h30 GMT
| Nom | Équipe | Temps | |
|---|---|---|---|
| 1 |  Kori Carter | United States | 54.99″ |
| 2 |  Wenda Nel | South Africa | + 0.48″ |
| 3 | Eilidh Doyle | Great Britain | + 0.5″ |
| 4 | Gianna Woodruff | Panama | + 1.51″ |
| 5 | Marzia Caravelli | Italy | + 1.93″ |
| 6 |  Viktoriya Tkachuk | Ukraine | + 2.06″ |
| 7 | Tia-Adana Belle | Barbados | + 3.83″ |
| 8 | Drita Islami | North Macedonia | + 5.39″ |