2012 FINA World Swimming Championships (25 m) – Women's 50 metre breaststroke
The women's 50 metre breaststroke event at the 11th FINA World Swimming Championships took place 12 - 13 December 2012 at the Sinan Erdem Dome.Records
Prior to this competition, the existing world and championship records were as follows.
| Name | Nation | Time | Location | Date |
| World record | Jessica Hardy | | 28.80 | Berlin | 15 November 2009 |
| Championship record | Jessica Hardy | | 29.58 | Manchester | 10 April 2008 |
The following records were established during the competition:
| Date | Event | Name | Nation | Time | Record |
| 12 December | Heats | Rūta Meilutytė | | 29.56 | CR |
| 12 December | Semifinals | Rūta Meilutytė | | 29.51 | CR |
| 13 December | Final | Rūta Meilutytė | | 29.44 | CR |
Results
Heats
| Rank | Heat | Lane | Name | Time | Notes |
| 1 | 6 | 4 | | 29.56 | Q, CR, NR |
| 2 | 8 | 4 | | 29.72 | Q,NR |
| 3 | 6 | 5 | | 29.74 | Q |
| 4 | 8 | 5 | | 30.13 | Q |
| 5 | 6 | 3 | | 30.24 | Q |
| 6 | 7 | 3 | | 30.25 | Q |
| 7 | 7 | 4 | | 30.26 | Q |
| 8 | 8 | 3 | | 30.34 | Q |
| 9 | 7 | 5 | | 30.34 | Q |
| 10 | 6 | 8 | | 30.81 | Q |
| 11 | 7 | 6 | | 30.90 | Q |
| 11 | 8 | 6 | | 30.90 | Q |
| 13 | 8 | 2 | | 30.95 | Q |
| 14 | 6 | 6 | | 30.98 | Q |
| 15 | 6 | 7 | | 31.01 | Q |
| 16 | 2 | 6 | | 31.08 | Q |
| 17 | 2 | 8 | | 31.17 | |
| 17 | 6 | 2 | | 31.17 | NR |
| 17 | 8 | 7 | | 31.17 | |
| 20 | 7 | 7 | | 31.38 | |
| 21 | 7 | 1 | | 31.42 | |
| 22 | 7 | 0 | | 31.52 | |
| 23 | 2 | 4 | | 31.62 | |
| 24 | 8 | 8 | | 31.70 | |
| 25 | 6 | 0 | | 31.82 | |
| 26 | 6 | 1 | | 31.87 | |
| 27 | 8 | 9 | | 31.90 | |
| 28 | 8 | 1 | | 31.93 | |
| 29 | 5 | 3 | | 32.04 | |
| 30 | 5 | 4 | | 32.05 | |
| 31 | 8 | 0 | | 32.30 | |
| 32 | 7 | 8 | | 32.47 | |
| 33 | 6 | 9 | | 32.63 | NR |
| 34 | 7 | 9 | | 32.76 | |
| 35 | 5 | 5 | | 33.04 | |
| 36 | 2 | 2 | | 33.17 | |
| 37 | 5 | 6 | | 33.24 | |
| 38 | 5 | 0 | | 33.79 | |
| 39 | 4 | 5 | | 34.45 | |
| 40 | 5 | 7 | | 34.68 | |
| 41 | 5 | 9 | | 34.78 | |
| 42 | 2 | 1 | | 34.96 | |
| 43 | 4 | 4 | | 35.17 | |
| 44 | 5 | 2 | | 35.35 | |
| 45 | 5 | 1 | | 35.36 | |
| 46 | 4 | 8 | | 36.36 | |
| 47 | 4 | 2 | | 36.57 | |
| 48 | 3 | 4 | | 36.68 | |
| 49 | 4 | 7 | | 36.69 | |
| 50 | 2 | 5 | | 36.76 | |
| 50 | 4 | 6 | | 36.76 | |
| 52 | 4 | 9 | | 37.61 | |
| 53 | 2 | 3 | | 37.81 | |
| 54 | 3 | 6 | | 37.91 | |
| 55 | 3 | 5 | | 38.78 | |
| 56 | 3 | 2 | | 39.22 | |
| 57 | 3 | 8 | | 40.37 | |
| 58 | 4 | 1 | | 40.50 | |
| 59 | 3 | 1 | | 42.03 | |
| 60 | 3 | 7 | | 42.70 | |
| 61 | 2 | 7 | | | |
| 1 | 3 | | | |
| 1 | 4 | | | |
| 1 | 5 | | | |
| 2 | 0 | | | |
| 3 | 0 | | | |
| 3 | 3 | | | |
| 3 | 9 | | | |
| 4 | 0 | | | |
| 4 | 3 | | | |
| 5 | 8 | | | |
| 7 | 2 | | | |
Swim-off
| Rank | Lane | Name | Time | Notes |
| 17 | 2 | | 31.06 | NR |
| 18 | 8 | | 31.12 | |
| 19 | 3 | | 31.16 | |
Semifinals
| Rank | Heat | Lane | Name | Nationality | Time | Notes |
| 1 | 2 | 4 | Rūta Meilutytė | | 29.51 | Q, CR, ER |
| 2 | 1 | 4 | Alia Atkinson | | 29.62 | Q, NR |
| 3 | 2 | 5 | Jessica Hardy | | 29.82 | Q |
| 4 | 1 | 5 | Petra Chocová | | 30.05 | Q |
| 5 | 1 | 3 | Rikke Møller Pedersen | | 30.19 | Q, NR |
| 5 | 2 | 3 | Sarah Katsoulis | | 30.19 | Q |
| 7 | 2 | 6 | Rebecca Ejdervik | | 30.25 | Q |
| 8 | 2 | 8 | Zhao Jin | | 30.33 | Q |
| 9 | 1 | 6 | Jennie Johansson | | 30.41 | |
| 10 | 1 | 2 | Ellyn Baumgardner | | 30.47 | |
| 11 | 2 | 2 | Valentina Artemyeva | | 30.65 | |
| 11 | 2 | 7 | Samantha Marshall | | 30.65 | |
| 13 | 1 | 7 | Beatriz Travalon | | 30.84 | |
| 14 | 1 | 8 | Ji Liping | | 30.88 | |
| 15 | 2 | 1 | Jenna Laukkanen | | 30.90 | |
| 16 | 1 | 1 | Tera van Beilen | | 30.99 | |
Final
| Rank | Lane | Name | Nationality | Time | Notes |
| 4 | Rūta Meilutytė | LTU | 29.44 | CR, ER |
| 5 | Alia Atkinson | JAM | 29.67 | |
| 7 | Sarah Katsoulis | AUS | 29.94 | |
| 4 | 2 | Rikke Møller Pedersen | DEN | 30.00 | NR |
| 5 | 3 | Jessica Hardy | USA | 30.01 | |
| 6 | 6 | Petra Chocová | CZE | 30.10 | |
| 7 | 1 | Rebecca Ejdervik | SWE | 30.12 | |
| 8 | 8 | Zhao Jin | CHN | 30.43 | |
