| POS | Rank | Heat | BIB | ATHLETE | COUNTRY | RESULTS | ms* |
|---|---|---|---|---|---|---|---|
| 1 | 1 | 2 | 845 | Stephenie Ann MCPHERSON |
JAM |
50.15 Q SB | |
| 2 | 2 | 2 | 1011 | Natalia KACZMAREK |
POL |
50.21 Q | |
| 3 | 3 | 2 | 952 | Lieke KLAVER |
NED |
50.24 Q NR | |
| 4 | 1 | 6 | 1012 | Anna KIEŁBASIŃSKA |
POL |
50.63 Q | |
| 5 | 1 | 4 | 593 | Marileidy PAULINO |
DOM |
50.76 Q | .754 |
| 6 | 2 | 6 | 844 | Candice MCLEOD |
JAM |
50.76 Q | .755 |
| 7 | 1 | 3 | 449 | Sada WILLIAMS |
BAR |
51.05 Q | |
| 8 | 3 | 6 | 708 | Victoria OHURUOGU |
GBR |
51.07 Q | |
| 9 | 1 | 1 | 445 | Shaunae MILLER-UIBO |
BAH |
51.10 Q | |
| 10 | 4 | 2 | 721 | Nicole YEARGIN |
GBR |
51.17 q SB | |
| 11 | 1 | 5 | 590 | Fiordaliza COFIL |
DOM |
51.19 Q | |
| 12 | 2 | 3 | 926 | Modesta Justė MORAUSKAITĖ |
LTU |
51.27 Q | |
| 13 | 3 | 3 | 711 | Ama PIPI |
GBR |
51.32 Q | |
| 14 | 2 | 5 | 1154 | Talitha DIGGS |
USA |
51.54 Q | |
| 15 | 5 | 2 | 1026 | Cátia AZEVEDO |
POR |
51.55 q | .545 |
| 16 | 4 | 6 | 580 | Lada VONDROVÁ |
CZE |
51.55 q | .549 |
| 17 | 2 | 4 | 782 | Rhasidat ADELEKE |
IRL |
51.59 Q | |
| 18 | 3 | 4 | 1174 | Lynna IRBY-JACKSON |
USA |
51.78 Q | |
| 19 | 4 | 3 | 863 | Charokee YOUNG |
JAM |
51.84 q | |
| 20 | 3 | 5 | 564 | Roxana GÓMEZ |
CUB |
51.85 Q | |
| 21 | 2 | 1 | 774 | Aliyah ABRAMS |
GUY |
51.98 Q | |
| 22 | 3 | 1 | 1041 | Gabby SCOTT |
PUR |
52.05 Q | |
| 23 | 6 | 2 | 485 | Tabata VITORINO |
BRA |
52.17 q | |
| 24 | 4 | 1 | 438 | Susanne GOGL-WALLI |
AUT |
52.18 q | |
| 25 | 4 | 4 | 921 | Gunta VAIČULE |
LAT |
52.21 | |
| 26 | 5 | 3 | 783 | Sophie BECKER |
IRL |
52.24 | |
| 27 | 5 | 1 | 938 | Paola MORÁN |
MEX |
52.28 | |
| 28 | 5 | 6 | 509 | Natassha MCDONALD |
CAN |
52.41 | |
| 29 | 5 | 4 | 498 | Lauren GALE |
CAN |
52.46 | |
| 30 | 6 | 1 | 1158 | Kendall ELLIS |
USA |
52.55 | |
| 31 | 6 | 3 | 454 | Camille LAUS |
BEL |
52.56 | |
| 32 | 7 | 3 | 958 | Eveline SAALBERG |
NED |
52.59 | |
| 33 | 6 | 4 | 1066 | Anita HORVAT |
SLO |
52.67 | |
| 34 | 4 | 5 | 816 | Alice MANGIONE |
ITA |
52.72 | |
| 35 | 6 | 6 | 477 | Tiffani MARINHO |
BRA |
52.80 | .792 |
| 36 | 7 | 4 | 976 | Imaobong Nse UKO |
NGR |
52.80 | .794 |
| 37 | 7 | 2 | 1229 | Niddy MINGILISHI |
ZAM |
52.84 | |
| 38 | 5 | 5 | 1088 | Silke LEMMENS |
SUI |
52.86 | |
| 39 | 6 | 5 | 521 | Aiyanna STIVERNE |
CAN |
53.07 | |
| 40 | 7 | 5 | 459 | Naomi VAN DEN BROECK |
BEL |
53.16 | |
| 41 | 7 | 1 | 1047 | Miranda Charlene COETZEE |
RSA |
53.30 | |
| 42 | 7 | 6 | 931 | Shereen VALLABOUY |
MAS |
53.57 | |
| 43 | 8 | 6 | 992 | Rosie ELLIOTT |
NZL |
54.92 |
ms - Milliseconds - shown when two or more competitors finish with the same time down to hundredths of a second