| Final 20:15 | team | time | +time | L | | | 1. Ruta Meilutyte |  LTU | 1:05.47 | | 04 | Stats | | 2. Rebecca Soni |  USA | 1:05.55 | +0.08 | 05 | Stats | | 3. Satomi Suzuki |  JPN | 1:06.46 | +0.99 | 01 | Stats | | 4. Alia Atkinson |  JAM | 1:06.93 | +1.46 | 08 | Stats | | 5. Leisel Jones |  AUS | 1:06.95 | +1.48 | 02 | Stats | | 6. Breeja Larson | USA | 1:06.96 | +1.49 | 06 | Stats | | 7. Iuliia Efimova |  RUS | 1:06.98 | +1.51 | 03 | Stats | | 8. Rikke Pedersen |  DEN | 1:07.55 | +2.08 | 07 | Stats |
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| Semi 1 | time | +time | L | Rk. | | | 1. Rebecca Soni | USA | 1:05.98 | - | 04 | 2. | Times | | 2. Breeja Larson | USA | 1:06.70 | +0.72s | 05 | 4. | Times | | 3. Satomi Suzuki | JPN | 1:07.10 | +1.12s | 03 | 7. | Times | | 4. Alia Atkinson | JAM | 1:07.48 | +1.50s | 02 | 8. | Times | | 4. Tera Van Beilen |  CAN | 1:07.48 | +1.50s | 08 | 8. | Times | | 6. Jennie Johansson |  SWE | 1:07.57 | +1.59s | 06 | 10. | Times | | 7. Suzaan van Biljon |  RSA | 1:07.68 | +1.70s | 07 | 11. | Times | | 8. Mina Matsushima | JPN | 1:08.26 | +2.28s | 01 | 16. | Times |
| Semi 2 | time | +time | L | Rk. | | | 1. Ruta Meilutyte | LTU | 1:05.21 | EU | 04 | 1. | Times | | 2. Iuliia Efimova | RUS | 1:06.57 | +1.36s | 05 | 3. | Times | | 3. Leisel Jones | AUS | 1:06.81 | +1.60s | 03 | 5. | Times | | 4. Rikke Pedersen | DEN | 1:06.82 | +1.61s | 02 | 6. | Times | | 5. Sarah Poewe |  GER | 1:07.68 | +2.47s | 06 | 11. | Times | | 6. Leiston Pickett | AUS | 1:07.74 | +2.53s | 07 | 13. | Times | | 7. Jillian Tyler | CAN | 1:07.87 | +2.66s | 08 | 14. | Times | | 8. Jin Zhao |  CHN | 1:07.97 | +2.76s | 01 | 15. | Times |
| Swimm-Off | time | +time | L | Rk. | | | 1. Alia Atkinson | JAM | 1:06.79 | - | 05 | 8. | Times | | 2. Tera Van Beilen | CAN | 1:07.73 | +0.94s | 04 | 9. | Times |
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| | S | F | | Semi 1 | | 4 | | Semi 2 | | 4 | | Heat 6 | - | 2 | | Heat 5 | - | 3 | | Heat 4 | - | 2 | | Heat 3 | - | 1 | | Heat 2 | | Heat 1 |
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| Heat 6 | time | +time | L | Rk. | | | 1. Rebecca Soni | USA | 1:05.75 | - | 04 | 2. | Times | | 2. Iuliia Efimova | RUS | 1:06.51 | +0.76s | 05 | 3. | Times | | 3. Sarah Poewe | GER | 1:07.12 | +1.37s | 02 | 7. | Times | | 4. Jennie Johansson | SWE | 1:07.14 | +1.39s | 03 | 8. | Times | | 5. Moniek Nijhuis |  NED | 1:08.31 | +2.56s | 07 | 20. | Times | | 6. Siobhan-Marie Oconnor |  GBR | 1:08.32 | +2.57s | 08 | 21. | Times | | 7. Daria Deeva | RUS | 1:08.44 | +2.69s | 06 | 23. | Times | | 8. Concepcion Badillo Diaz |  ESP | 1:12.58 | +6.83s | 01 | 39. | Times |
| Heat 5 | time | +time | L | Rk. | | | 1. Breeja Larson | USA | 1:06.58 | - | 04 | 4. | Times | | 2. Satomi Suzuki | JPN | 1:07.08 | +0.50s | 05 | 6. | Times | | 3. Rikke Pedersen | DEN | 1:07.23 | +0.65s | 03 | 9. | Times | | 4. Tera Van Beilen | CAN | 1:07.85 | +1.27s | 02 | 16. | Times | | 5. Xiaoyu Liu | CHN | 1:07.99 | +1.41s | 07 | 17. | Times | | 6. Joline Hostman | SWE | 1:08.28 | +1.70s | 01 | 19. | Times | | 7. Caroline Ruhnau | GER | 1:08.43 | +1.85s | 06 | 22. | Times | | 8. Kate Haywood | GBR | 1:09.22 | +2.64s | 08 | 28. | Times |
| Heat 4 | time | +time | L | Rk. | | | 1. Ruta Meilutyte | LTU | 1:05.56 | - | 06 | 1. | Times | | 2. Leisel Jones | AUS | 1:06.98 | +1.42s | 04 | 5. | Times | | 3. Leiston Pickett | AUS | 1:07.41 | +1.85s | 05 | 11. | Times | | 4. Jin Zhao | CHN | 1:07.68 | +2.12s | 01 | 13. | Times | | 5. Mina Matsushima | JPN | 1:07.69 | +2.13s | 02 | 14. | Times | | 6. Jillian Tyler | CAN | 1:07.81 | +2.25s | 03 | 15. | Times | | 7. Marina Garcia Urzainqui | ESP | 1:08.64 | +3.08s | 07 | 25. | Times | | 8. McMahon Sycerika |  IRL | 1:08.80 | +3.24s | 08 | 26. | Times |
| Heat 3 | time | +time | L | Rk. | | | 1. Alia Atkinson | JAM | 1:07.39 | - | 06 | 10. | Times | | 2. Suzaan van Biljon | RSA | 1:07.54 | +0.15s | 02 | 12. | Times | | 3. Sara El Bekri |  MAR | 1:08.21 | +0.82s | 03 | 18. | Times | | 4. Petra Chocova |  CZE | 1:08.59 | +1.20s | 05 | 24. | Times | | 5. Michela Guzzetti |  ITA | 1:08.83 | +1.44s | 04 | 27. | Times | | 6. Dilara Buse Gunaydin |  TUR | 1:09.43 | +2.04s | 01 | 29. | Times | | 7. Hyejin Kim |  KOR | 1:09.79 | +2.40s | 07 | 33. | Times | | 8. Mariia Liver |  UKR | 1:11.23 | +3.84s | 08 | 37. | Times |
| Heat 2 | time | +time | L | Rk. | | | 1. Tjasa Vozel |  SLO | 1:09.63 | - | 04 | 30. | Times | | 2. Anna Sztankovics |  HUN | 1:09.65 | +0.02s | 05 | 31. | Times | | 3. Fanny Babou |  FRA | 1:09.76 | +0.13s | 06 | 32. | Times | | 4. Jenna Laukkanen |  FIN | 1:09.92 | +0.29s | 03 | 34. | Times | | 5. Ana Rodrigues |  POR | 1:10.62 | +0.99s | 02 | 35. | Times | | 6. Danielle Beaubrun |  LCA | 1:11.12 | +1.49s | 01 | 36. | Times | | 7. I-Chuan Chen |  TPE | 1:11.28 | +1.65s | 07 | 38. | Times | | 8. Tatiana Chisca |  MDA | 1:13.30 | +3.67s | 08 | 40. | Times |
| Heat 1 | time | +time | L | Rk. | | | 1. Ivana Ninkovic |  BIH | 1:14.04 | - | 04 | 41. | Times | | 2. Pilar Shimizu |  GUM | 1:15.76 | +1.72s | 03 | 42. | Times | | 3. Matelita Buadromo |  FIJ | 1:16.33 | +2.29s | 05 | 43. | Times | | 4. Oksana Hatamkhanova |  AZE | 1:25.52 | +11.48s | 06 | 44. | Times | | 5. Oyungerel Gantumur |  MGL | 1:27.17 | +13.13s | 02 | 45. | Times | | 6. Dede Camara |  GUI | 1:38.54 | +24.50s | 07 | 46. | Times |
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| Total eligible to participate 48 swimmers (started 46) |
| Olympic Qualifying Time - 1:08.49 - 20+8 | | Leiston Pickett | AUS | 13. | Leisel Jones | AUS | 5. | | Jillian Tyler | CAN | 14. | Tera van Beilen | CAN | 9. | | Liu Xiaoyu | CHN | 17. | Zhao Jin | CHN | 15. | | Kate Haywood | GBR | 28. | Siobhan-Marie O'Connor | GBR | 21. | | Sarah Poewe | GER | 11. | Caroline Ruhnau | GER | 22. | | Satomi Suzuki | JPN | 3. | Mina Matsushima | JPN | 16. | | Yulia Yefimova | RUS | 7. | Daria Deeva | RUS | 23. | | Concepción Badillo | ESP | 39. | Marina García | ESP | 25. | | Jennie Johansson | SWE | 10. | Joline Höstman | SWE | 19. | | Breeja Larson | USA | 6. | Rebecca Soni | USA | 2. | | Petra Chocova | CZE | 24. | | Rikke Møller Pedersen | DEN | 8. | | Sycerika McMahon | IRL | 26. | | Michela Guzzetti | ITA | 27. | | Alia Atkinson | JAM | 4. | | Rūta Meilutytė | LTU | 1. | | Sara El Bekri | MAR | 18. | | Moniek Nijhuis | NED | 20. |
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| Olympic Selection Time - 1:10.89 - 13 | | Suzaan van Biljon | RSA | qoe | 11. | | Kim Hye-Jin | KOR | 1:08.80 | 33. | | Dilara Buse Günaydın | TUR | 1:09.17 | 29. | | Tjasa Vosel | SLO | 1:09.22 | 30. | | Mariya Liver | UKR | 1:09.22 | 37. | | Anna Sztankovics | HUN | 1:09.31 | 31. | | Jenna Laukkanen | FIN | 1:09.39 | 34. | | Hrafnhildur Luthersdottir | ISL | 1:09.56 | DNS | | Fanny Lecluyse | BEL | qoe | DNS | | Fanny Babou | FRA | qoe | 32. | | Ana Rodrigues | POR | 1:09.92 | 35. | | Chen I-Chuan | TPE | 1:10.05 | 38. | | Danielle Beaubrun | LCA | up | 36. |
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| Wildcard Places - 7 | | Oksana Hatamkhanova | AZE | 44. | | Ivana Ninkovic | BIH | 41. | | Matelita Buadromo | FIJ | 43. | | Dede Camara | GUI | 46. | | Pilar Shimizu | GUM | 42. | | Tatiana Chisca | MDA | 40. | | Oyungerel Gantumur | MGL | 45. |
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| Olympic Qualification time | time | place | date | birth | | 1. Rebecca Soni | USA | 1:04.91 | Shanghai(CHN) | 24.07.2011 | 18/03/1987 | | 2. Breeja Larson | USA | 1:05.92 | Omaha(USA) | 25.06.2012 | 16/04/1992 | | 3. Leisel Jones | AUS | 1:06.18 | Sydney(AUS) | 01.04.2011 | 30/08/1985 | | 4. Yulia Efimova | RUS | 1:06.56 | Shanghai(CHN) | 24.07.2011 | 03/04/1992 | | 5. Satomi Suzuki | JPN | 1:06.80 | Tokyo(JPN) | 02.04.2012 | 29/01/1991 | | 6. Leiston Pickett | AUS | 1:06.88 | Adelaide(AUS) | 15.03.2012 | 06/02/1992 | | 7. Jennie Johansson | SWE | 1:07.10 | London(GBR) | 03.03.2012 | 15/06/1988 | | 8. Rikke Pedersen | DEN | 1:07.13 | Shanghai(CHN) | 24.07.2011 | 09/01/1989 | | 9. Jillian Tyler | CAN | 1:07.18 | Montreal(CAN) | 27.03.2012 | 05/09/1988 | | 10.Daria Deeva | RUS | 1:07.22 | Moscow(RUS) | 17.04.2012 | 02/09/1990 | | 11.Caroline Ruhnau | GER | 1:07.28 | Berlin(GER) | 10.05.2012 | 16/10/1984 | | 12.Ruta Meilutyte | LTU | 1:07.30 | London(GBR) | 03.03.2012 | 19/03/1997 | | 13.Sarah Poewe | GER | 1:07.33 | Debrecen(HUN) | 21.05.2012 | 03/03/1983 | | 14.Tera Van Beilen | CAN | 1:07.37 | Montreal(CAN) | 27.03.2012 | 30/03/1993 | | 15.Mina Matsushima | JPN | 1:07.54 | Tokyo(JPN) | 02.04.2012 | 25/01/1991 | | 16.Moniek Nijhuis | NED | 1:07.60 | Shanghai(CHN) | 24.07.2011 | 20/03/1988 | | 17.Xiaoyu Liu | CHN | 1:07.84 | Wuhan(CHN) | 02.04.2011 | 25/06/1988 | | 18.Marina Garcia Urzainqui | ESP | 1:07.91 | Debrecen(HUN) | 21.05.2012 | 06/06/1994 | | 19.Concepcion Badillo Diaz | ESP | 1:07.97 | Malaga(ESP) | 29.03.2012 | 13/07/1986 | | 20.Jin Zhao | CHN | 1:07.99 | Shaoxing(CHN) | 01.04.2012 | 17/03/1990 | | 21.Joline Hoestman | SWE | 1:07.99 | Stockholm(SWE) | 26.03.2011 | 24/09/1988 | | 22.Siobhan-Marie O'Connor | GBR | 1:08.04 | London(GBR) | | 29/11/1995 | | 23.Kate Haywood | GBR | 1:08.07 | London(GBR) | 03.03.2012 | 01/04/1987 | | 24.Sycerika McMahon | IRL | 1:08.37 | Debrecen(HUN) | 21.05.2012 | 11/04/1995 | | 25.Michela Guzzetti | ITA | 1:08.39 | Rome(ITA) | 14.06.2012 | 29/04/1992 | | 26.Petra Chocova | CZE | 1:08.40 | Shanghai(CHN) | 24.07.2011 | 16/08/1986 | | 27.Sara El Bekri | MAR | 1:08.42 | Doha(QAT) | 17.12.2011 | 02/07/1987 | | 28.Alia Atkinson | JAM | 1:08.45 | Santa Clara(USA) | 31.05.2012 | 11/12/1988 |
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London 2012