| POS | Rank | Heat | BIB | ATHLETE | COUNTRY | RESULTS | ms* |
|---|---|---|---|---|---|---|---|
| 1 | 1 | 2 | 300 | Femke BOL |
NED |
51.48 Q | |
| 2 | 1 | 5 | 110 | Shaunae MILLER-UIBO |
BAH |
51.74 Q SB | |
| 3 | 1 | 1 | 245 | Phil HEALY |
IRL |
51.75 Q | |
| 4 | 2 | 5 | 273 | Stephenie Ann MCPHERSON |
JAM |
51.86 Q | |
| 5 | 2 | 1 | 303 | Lieke KLAVER |
NED |
51.96 Q | |
| 6 | 3 | 5 | 291 | Modesta Justė MORAUSKAITĖ |
LTU |
52.11 q | |
| 7 | 1 | 4 | 319 | Natalia KACZMAREK |
POL |
52.22 Q | |
| 8 | 4 | 5 | 150 | Roxana GÓMEZ |
CUB |
52.25 q SB | |
| 9 | 2 | 4 | 233 | Aliyah ABRAMS |
GUY |
52.34 Q | |
| 10 | 1 | 3 | 323 | Justyna ŚWIĘTY-ERSETIC |
POL |
52.37 Q | |
| 11 | 3 | 4 | 117 | Camille LAUS |
BEL |
52.51 SB | |
| 12 | 2 | 2 | 215 | Ama PIPI |
GBR |
52.53 Q | |
| 13 | 3 | 1 | 114 | Sada WILLIAMS |
BAR |
52.65 | |
| 14 | 3 | 2 | 378 | Jessica BEARD |
USA |
52.72 | |
| 15 | 4 | 4 | 388 | Lynna IRBY-JACKSON |
USA |
52.78 | |
| 16 | 4 | 1 | 272 | Roneisha MCGREGOR |
JAM |
52.89 | |
| 17 | 2 | 3 | 208 | Jessie KNIGHT |
GBR |
52.93 Q | |
| 18 | 3 | 3 | 162 | Lada VONDROVÁ |
CZE |
52.94 | |
| 19 | 5 | 1 | 326 | Cátia AZEVEDO |
POR |
53.01 | |
| 20 | 6 | 1 | 288 | Gunta VAIČULE |
LAT |
53.05 SB | .041 |
| 21 | 4 | 2 | 159 | Tereza PETRŽILKOVÁ |
CZE |
53.05 | .050 |
| 22 | 5 | 4 | 177 | Sara GALLEGO |
ESP |
53.13 | |
| 23 | 5 | 5 | 343 | Maja ĆIRIĆ |
SRB |
53.36 | |
| 24 | 4 | 3 | 242 | Sophie BECKER |
IRL |
53.47 | |
| 25 | 6 | 4 | 232 | Eirini VASILEIOU |
GRE |
53.62 SB | |
| 26 | 5 | 3 | 111 | Megan MOSS |
BAH |
54.03 | |
| 27 | 5 | 2 | 142 | Micha POWELL |
CAN |
54.65 | |
| 28 | 6 | 5 | 366 | Yanique HAYE-SMITH |
TKS |
56.20 |
ms - Milliseconds - shown when two or more competitors finish with the same time down to hundredths of a second