| POS | BIB | ATHLETE | COUNTRY | MARK | Reaction Time |
|---|---|---|---|---|---|
| 1 | 715 | Patricia Hall |
JAM
|
52.82 Q | 0.171 |
| 2 | 776 | Justyna ŚWIĘTY-ERSETIC |
POL
|
52.97 Q | 0.240 |
| 3 | 847 | Joanna Atkins |
USA
|
53.20 Q | 0.184 |
| 742 | Lisanne DE WITTE |
NED
|
DQ R163.2(b) | 0.271 | |
| 642 | Denisa Rosolová |
CZE
|
DNF | 0.219 | |
| 750 | Regina George |
NGR
|
DNS |
| POS | BIB | ATHLETE | COUNTRY | MARK | Reaction Time |
|---|---|---|---|---|---|
| 1 | 865 | Francena McCorory |
USA
|
51.35 Q | 0.284 |
| 2 | 719 | Kaliese Spencer |
JAM
|
51.58 Q PB | 0.237 |
| 3 | 608 | Shaunae MILLER-UIBO |
BAH
|
51.63 Q SB | 0.166 |
| 4 | 661 | Margaret Adeoye |
GBR
|
53.59 | 0.196 |
| 5 | 678 | Esther Cremer |
GER
|
53.60 | 0.213 |
| 807 | Kseniya Ryzhova |
RUS
|
DQ | 0.167 |