| POS | BIB | ATHLETE | COUNTRY | MARK | Reaction Time | 
|---|---|---|---|---|---|
| 1 | 445 | Shaunae MILLER-UIBO |  BAH | 49.55 Q SB | 0.129 | 
| 2 | 844 | Candice MCLEOD |  JAM | 50.05 Q SB | 0.149 | 
| 3 | 1012 | Anna KIEŁBASIŃSKA |  POL | 50.65 q | 0.158 | 
| 4 | 782 | Rhasidat ADELEKE |  IRL | 50.81 | 0.178 | 
| 5 | 708 | Victoria OHURUOGU |  GBR | 50.99 PB | 0.178 | 
| 6 | 1174 | Lynna IRBY-JACKSON |  USA | 51.00 | 0.184 | 
| 7 | 1026 | Cátia AZEVEDO |  POR | 51.79 | 0.169 | 
| 8 | 485 | Tabata VITORINO |  BRA | 52.42 | 0.203 | 
| Split | Mark | Athlete | COUNTRY | 
|---|---|---|---|
| 100 m | 11.78 |  Shaunae MILLER-UIBO |  BAH | 
| 200 m | 23.43 |  Shaunae MILLER-UIBO |  BAH | 
| 300 m | 35.71 |  Shaunae MILLER-UIBO |  BAH | 
| POS | BIB | ATHLETE | COUNTRY | MARK | Reaction Time | 
|---|---|---|---|---|---|
| 1 | 590 | Fiordaliza COFIL |  DOM | 50.14 Q PB | 0.158 | 
| 2 | 952 | Lieke KLAVER |  NED | 50.18 Q NR | 0.140 | 
| 3 | 845 | Stephenie Ann MCPHERSON |  JAM | 50.56 q | 0.133 | 
| 4 | 721 | Nicole YEARGIN |  GBR | 51.22 | 0.156 | 
| 5 | 1011 | Natalia KACZMAREK |  POL | 51.34 | 0.141 | 
| 6 | 774 | Aliyah ABRAMS |  GUY | 51.79 | 0.157 | 
| 7 | 1041 | Gabby SCOTT |  PUR | 51.97 | 0.215 | 
| 8 | 438 | Susanne GOGL-WALLI |  AUT | 52.37 | 0.157 | 
| Split | Mark | Athlete | COUNTRY | 
|---|---|---|---|
| 100 m | 12.09 |  Lieke KLAVER |  NED | 
| 200 m | 23.80 |  Lieke KLAVER |  NED | 
| 300 m | 36.67 |  Fiordaliza COFIL |  DOM | 
| POS | BIB | ATHLETE | COUNTRY | MARK | Reaction Time | 
|---|---|---|---|---|---|
| 1 | 593 | Marileidy PAULINO |  DOM | 49.98 Q | 0.171 | 
| 2 | 449 | Sada WILLIAMS |  BAR | 50.12 Q SB | 0.168 | 
| 3 | 1154 | Talitha DIGGS |  USA | 50.84 | 0.147 | 
| 4 | 564 | Roxana GÓMEZ |  CUB | 51.12 | 0.192 | 
| 5 | 863 | Charokee YOUNG |  JAM | 51.41 | 0.175 | 
| 6 | 580 | Lada VONDROVÁ |  CZE | 51.47 | 0.199 | 
| 7 | 926 | Modesta Justė MORAUSKAITĖ |  LTU | 52.19 | 0.176 | 
| 8 | 711 | Ama PIPI |  GBR | 52.28 | 0.174 | 
| Split | Mark | Athlete | COUNTRY | 
|---|---|---|---|
| 100 m | 12.18 |  Marileidy PAULINO |  DOM | 
| 200 m | 23.67 |  Marileidy PAULINO |  DOM | 
| 300 m | 36.22 |  Marileidy PAULINO |  DOM |