Heat 4
lundi 30 septembre 2019, 17h20 GMT – 17h20 GMT
| Nom | Équipe | Temps | |
|---|---|---|---|
| 1 |  Galefele Moroko | Botswana | 50.59″ |
| 2 |  Stephenie McPherson | Jamaica | + 0.62″ |
| 3 |  Favour Ofili | Nigeria | + 0.92″ |
| 4 |  Aliyah Abrams | Guyana | + 1.14″ |
| 5 |  Kendall Ellis | United States | + 1.23″ |
| 6 | Roxana Gómez | Cuba | + 1.26″ |
| 7 | Maggie Barrie | Sierra Leone | + 1.57″ |
| 8 | Gabriella O'Grady | Australia | + 4.4″ |