| Final: Start time: 20:09 +8 UTC, Temperature 24° C, Humidity 69 % _ |
| Ranking Final | time | | L | React. | bib | | 1. Zuzana Hejnová |  CZE | 53.50s | Wl | 5 | 0.153 | 303 | | 2. Shamier Little |  USA | 53.94s | | 2 | 0.227 | 896 | | 3. Cassandra Tate | USA | 54.02s | | 6 | 0.189 | 922 | | 4. Sara Slott Petersen |  DEN | 54.20s | | 4 | 0.155 | 310 | | 5. Janieve Russell |  JAM | 54.64s | Pb | 9 | 0.165 | 523 | | 6. Eilidh Child |  GBR | 54.78s | | 3 | 0.161 | 387 | | 7. Wenda Nel |  RSA | 54.94s | | 8 | 0.211 | 707 | | 8. Kaliese Spencer | JAM | 55.47s | | 7 | 0.196 | 525 |
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| Record | Athlete | mark | venue | date | | World Record | Yuliya Pechonkina (RUS) | 52.34s | Tula, Russia | 8 August 2003 | | Championship Record | Melaine Walker (JAM) | 52.42s | Berlin, Germany | 20 August 2009 | | World Leading | Shamier Little (USA) | 53.74s | Eugene, United States | 13 June 2015 | | African Record | Nezha Bidouane (MAR) | 52.90s | Seville, Spain | 25 August 1999 | | Asian Record | Qing Han (CHN) | 53.96s | Beijing, China | 9 September 1993 | | Nacac Record | Melaine Walker (JAM) | 52.42s | Berlin, Germany | 20 August 2009 | | South American Record | Lucimar Teodoro (BRA) | 55.84s | Belém, Brazil | 24 May 2009 | | European Record | Yuliya Pechonkina (RUS) | 52.34s | Tula, Russia | 8 August 2003 | | Oceanian Record | Debbie Flintoff-King (AUS) | 53.17s | Seoul, South Korea | 27 September 1988 |
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| Athlete | Best 2015 | Pers. Best | Heat | L | birth | bib |
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