| Final | time | gap | L | React. | Pts |  | 1. Sarah Sjöström |   Sweden | 25.02s |   | 4 | 0.67 | 930 |  | 2. Ranomi Kromowidjojo |   Netherlands | 25.35s | +0.33s | 5 | 0.67 | 895 |  | 3. Farida Osman |   Egypt | 25.47s | +0.45s | 2 | 0.67 | 882 |  | 4. Kelsi Dahlia |   United States | 25.48s AM | +0.46s | 6 | 0.67 | 881 |  | 5. Marie Wattel |   France | 25.50s | +0.48s | 3 | 0.67 | 879 |  | 6. Penny Oleksiak |   Canada | 25.69s | +0.67s | 7 | 0.67 | 859 |  | 7. Jeanette Ottesen |   Denmark | 26.11s | +0.74s | 8 | 0.67 | 852 |  | 8. Brianna Throssell |   Australia | 25.76s | +1.09s | 1 | 0.67 | 819 |   
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| 64 competitors from 58 nations. |  | Not Olympic Event. |   
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| World Record: Sarah Sjöström (SWE) 24.43s Borås, Sweden, 5 July 2014 |  | World Championships Record: Sarah Sjöström (SWE) 24.60s Budapest, Hungary, 29 July 2017 |  | World Junior Record:  |   
                     
| Ranking | time | L | SR |  |  Semifinal 1 |  | 1. Marie Wattel |   France | 25.56s | 6 | 3. |  | 2. Kelsi Dahlia |   United States | 25.59s | 4 | 4. |  | 3. Penny Oleksiak |   Canada | 25.93s | 5 | 6. |  | 4. Arina Surkova |   Russia | 26.06s | 8 | 9. |  | 5. Louise Hansson |   Sweden | 26.10s | 3 | 10. |  | 6. Zhang Yufei |   China | 26.18s | 7 | 12. |  | 7. Wang Yichun |   China | 26.21s | 2 | 13. |  | 8. Kimberly Buys |   Belgyum | 26.51s | 1 | 16. |  |  Semifinal 1 |  | 1. Sarah Sjöström |   Sweden | 24.79s | 4 | 1. |  | 2. Ranomi Kromowidjojo |   Netherlands | 25.54s | 3 | 2. |  | 3. Farida Osman |   Egypt | 25.79s | 5 | 5. |  | 4. Brianna Throssell |   Australia | 25.93s | 1 | 6. |  | 5. Jeanette Ottesen |   Denmark | 26.01s | 2 | 8. |  | 6. Elena Di Liddo |   Italy | 26.16s | 6 | 11. |  | 7. Maggie MacNeil |   Canada | 26.28s | 7 | 14. |  | 8. Anna Ntountounaki |   Greece | 26.31s | 8 | 15. |   
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