| POS | Rank | Heat | BIB | ATHLETE | COUNTRY | RESULTS | 
|---|---|---|---|---|---|---|
| 1 | 1 | 4 | 1381 | Tiffany JAMES |  JAM | 52.98 Q | 
| 2 | 1 | 1 | 1424 | Maureen Nyatichi THOMAS |  KEN | 53.04 Q | 
| 3 | 1 | 5 | 1655 | Lynna IRBY-JACKSON |  USA | 53.08 Q | 
| 4 | 1 | 3 | 1141 | Roxana GÓMEZ |  CUB | 53.16 Q | 
| 5 | 1 | 2 | 1376 | Junelle BROMFIELD |  JAM | 53.21 Q | 
| 6 | 2 | 1 | 1085 | Natassha MCDONALD |  CAN | 53.62 Q PB | 
| 7 | 3 | 1 | 1276 | Hendrikje Richter |  GER | 53.67 Q | 
| 8 | 2 | 5 | 1006 | Jessica Thornton |  AUS | 53.70 Q | 
| 9 | 2 | 2 | 1622 | Dzhois Koba |  UKR | 53.74 Q | 
| 10 | 2 | 3 | 1264 | Hannah WILLIAMS |  GBR | 53.85 Q | 
| 11 | 1 | 6 | 1445 | Paola MORÁN |  MEX | 53.96 Q | 
| 12 | 3 | 2 | 1680 | Karrington Winters |  USA | 54.12 Q | 
| 13 | 2 | 6 | 1153 | Zdeňka SEIDLOVÁ |  CZE | 54.13 Q SB | 
| 14 | 3 | 6 | 1346 | Rebecca BORGA |  ITA | 54.41 Q | 
| 15 | 3 | 5 | 1080 | Ashlan Best |  CAN | 54.47 Q | 
| 16 | 4 | 2 | 1543 | Jeanelle Griesel |  RSA | 54.47 q | 
| 17 | 4 | 1 | 1040 | Shaquania Dorsett |  BAH | 54.55 q | 
| 18 | 4 | 6 | 1431 | Vijona Kryeziu |  KOS | 54.67 q SB | 
| 19 | 5 | 6 | 1253 | Lily Beckford |  GBR | 54.70 q | 
| 20 | 2 | 4 | 1613 | Ivanna Avramchuk |  UKR | 54.71 Q | 
| 21 | 4 | 5 | 1278 | Hannah MERGENTHALER |  GER | 54.75 q | 
| 22 | 3 | 3 | 1506 | Natalia KACZMAREK |  POL | 54.75 Q | 
| 23 | 5 | 1 | 1436 | Erika Kruminaité |  LTU | 54.89 q SB | 
| 24 | 6 | 6 | 1335 | Mollie O'Reilly |  IRL | 54.92 PB | 
| 25 | 3 | 4 | 1327 | Jenna Bromell |  IRL | 54.98 Q | 
| 26 | 4 | 3 | 1568 | Chelsea Zoller |  SUI | 55.00 | 
| 27 | 5 | 5 | 1374 | Tarika Moses |  IVB | 55.04 | 
| 28 | 5 | 2 | 1137 | Dora Filipovic |  CRO | 55.16 | 
| 29 | 4 | 4 | 1395 | Haruko Ishizuka |  JPN | 55.20 | 
| 30 | 6 | 1 | 1342 | Myia Dorsey |  ISV | 55.25 | 
| 31 | 7 | 1 | 1065 | Galefele MOROKO |  BOT | 55.38 | 
| 32 | 7 | 6 | 1005 | Molly Blakey |  AUS | 55.49 | 
| 33 | 6 | 5 | 1355 | Daniela Tassani |  ITA | 55.62 | 
| 34 | 5 | 3 | 1215 | Zinash Tesfaye |  ETH | 55.75 | 
| 35 | 6 | 3 | 1340 | Thórdís Eva Steinsdóttir |  ISL | 56.06 | 
| 36 | 5 | 4 | 1112 | Nuo Liang |  CHN | 56.08 | 
| 37 | 6 | 4 | 1128 | Eliana CHAVEZ |  COL | 56.96 | 
| 38 | 7 | 5 | 1423 | Jane Njoki Theuri |  KEN | 57.13 | 
| 39 | 8 | 5 | 1688 | María Simancas |  VEN | 57.51 | 
| 40 | 8 | 1 | 1149 | Kalliopi Kountouri |  CYP | 59.11 | 
| 2 | 1209 | Mahilet Fikre |  ETH | DQ R163.3(a) | ||
| 3 | 1320 | Jisna Mathew |  IND | DQ R163.3(a) | ||
| 3 | 1052 | Mariette Agbety |  BEN | DNS | ||
| 4 | 1471 | Praise IDAMADUDU |  NGR | DNS | ||
| 4 | 1001 | Artesha Richardson |  AIA | DNS | ||
| 2 | 1689 | Shafiqua MALONEY |  VIN | DNS | ||
| 6 | 1467 | Yinka AJAYI |  NGR | DNS |