| Order / Lane | Bib | ATHLETE | COUNTRY | PB | SB 2007 | 
|---|---|---|---|---|---|
| 1 | 400 | Martina Xuereb |  MLT | 55.41 | 55.41 | 
| 2 | 348 | Bearose Chepkoech |  KEN | 55.65 | 55.65 | 
| 3 | 525 | Alexandra Štuková |  SVK | 54.09 | 54.63 | 
| 4 | 583 | Meshawn Graham |  USA | 52.51 | 52.51 | 
| 5 | 575 | Olha Zemlyak |  UKR | 53.94 | 53.94 | 
| 6 | 311 | Latoya McDermott |  JAM | 53.48 | 53.48 | 
| 7 | 294 | Valentina Zappa |  ITA | 55.27 | 55.27 | 
| 8 | 41 | Sade Sealy |  BAR | 54.95 | 54.95 | 
| Order / Lane | Bib | ATHLETE | COUNTRY | PB | SB 2007 | 
|---|---|---|---|---|---|
| 1 | 292 | Chiara Natali |  ITA | 54.85 | 55.84 | 
| 2 | 277 | Poovamma Raju MACHETTIRA |  IND | 55.22 | 55.30 | 
| 3 | 42 | Mara Weekes |  BAR | 54.49 | 54.49 | 
| 4 | 581 | Brianna Frazier |  USA | 54.62 | 54.62 | 
| 5 | 559 | Yuliya Baraley |  UKR | 53.52 | 53.52 | 
| 6 | 399 | Francesca Xuereb |  MLT | 55.10 | 55.10 | 
| 7 | 79 | Natalie Geiger |  CAN | 55.50 | 55.50 | 
| 8 | 346 | Betty Chelangat |  KEN | 55.66 | 55.66 |