2012 FINA World Swimming Championships (25 m) – Women's 100 metre breaststroke
The women's 100 metre breaststroke event at the 11th FINA World Swimming Championships took place 14 - 15 December 2012 at the Sinan Erdem Dome.Records
Prior to this competition, the existing world and championship records were as follows.
The following records were established during the competition:
| Date | Event | Name | Nation | Time | Record |
| 15 December | Final | Rūta Meilutytė | | 1:03.52 | CR |
Results
Heats
| Rank | Heat | Lane | Name | Time | Notes |
| 1 | 7 | 5 | | 1:04.69 | Q, NR |
| 2 | 6 | 4 | | 1:04.73 | Q |
| 3 | 6 | 5 | | 1:04.76 | Q |
| 4 | 7 | 4 | | 1:05.04 | Q |
| 5 | 5 | 4 | | 1:05.26 | Q |
| 6 | 5 | 5 | | 1:06.10 | Q |
| 7 | 6 | 3 | | 1:06.16 | Q |
| 8 | 5 | 6 | | 1:06.32 | Q |
| 9 | 6 | 6 | | 1:06.45 | Q |
| 10 | 6 | 7 | | 1:06.61 | Q, NR |
| 11 | 7 | 6 | | 1:06.74 | Q |
| 12 | 7 | 3 | | 1:06.75 | Q |
| 13 | 7 | 2 | | 1:06.90 | Q |
| 14 | 2 | 1 | | 1:06.92 | Q |
| 15 | 5 | 7 | | 1:06.93 | Q |
| 16 | 6 | 0 | | 1:06.98 | Q |
| 17 | 7 | 7 | | 1:07.10 | |
| 17 | 7 | 1 | | 1:07.10 | |
| 19 | 5 | 2 | | 1:07.12 | |
| 20 | 5 | 3 | | 1:07.15 | |
| 21 | 5 | 8 | | 1:07.49 | |
| 22 | 1 | 5 | | 1:07.54 | |
| 23 | 6 | 2 | | 1:07.60 | |
| 24 | 7 | 8 | | 1:07.85 | |
| 25 | 4 | 4 | | 1:07.97 | |
| 26 | 5 | 0 | | 1:08.03 | |
| 27 | 5 | 1 | | 1:08.17 | |
| 28 | 6 | 1 | | 1:08.21 | |
| 29 | 4 | 6 | | 1:08.68 | |
| 30 | 7 | 0 | | 1:09.21 | |
| 31 | 4 | 5 | | 1:09.28 | NR |
| 32 | 6 | 9 | | 1:09.29 | NR |
| 33 | 6 | 8 | | 1:09.34 | |
| 34 | 4 | 3 | | 1:10.12 | |
| 35 | 5 | 9 | | 1:10.91 | |
| 36 | 4 | 7 | | 1:10.96 | |
| 37 | 4 | 9 | | 1:11.73 | |
| 38 | 4 | 1 | | 1:12.43 | |
| 39 | 2 | 8 | | 1:12.47 | |
| 40 | 4 | 2 | | 1:12.92 | |
| 41 | 4 | 0 | | 1:13.23 | NR |
| 42 | 3 | 3 | | 1:13.73 | |
| 43 | 3 | 2 | | 1:15.70 | |
| 44 | 3 | 1 | | 1:16.02 | |
| 45 | 1 | 4 | | 1:17.24 | |
| 46 | 3 | 7 | | 1:17.40 | |
| 47 | 3 | 6 | | 1:18.62 | |
| 48 | 3 | 8 | | 1:18.74 | |
| 49 | 3 | 9 | | 1:19.04 | |
| 50 | 3 | 5 | | 1:20.10 | |
| 51 | 2 | 4 | | 1:20.66 | |
| 52 | 4 | 8 | | 1:20.76 | |
| 53 | 3 | 0 | | 1:20.97 | |
| 54 | 2 | 7 | | 1:21.78 | |
| 55 | 2 | 6 | | 1:24.79 | |
| 56 | 2 | 3 | | 1:24.86 | |
| 57 | 2 | 5 | | 1:24.94 | |
| 58 | 2 | 2 | | 1:33.26 | |
| 59 | 2 | 0 | | 1:35.71 | |
| 1 | 3 | | | |
| 3 | 4 | | | |
| 7 | 9 | | | |
Swim-off
| Rank | Lane | Name | Time | Notes |
| 1 | 4 | | 1:06.20 | |
| 2 | 5 | | 1:06.99 | |
Semifinals
| Rank | Heat | Lane | Name | Nationality | Time | Notes |
| 1 | 1 | 4 | Rikke Møller Pedersen | | 1:04.11 | Q, NR |
| 2 | 2 | 4 | Rūta Meilutytė | | 1:04.81 | Q |
| 3 | 2 | 3 | Alia Atkinson | | 1:04.99 | Q |
| 4 | 2 | 5 | Sarah Katsoulis | | 1:05.12 | Q |
| 5 | 1 | 5 | Jessica Hardy | | 1:05.42 | Q |
| 6 | 1 | 3 | Jennie Johansson | | 1:05.62 | Q |
| 7 | 2 | 6 | Petra Chocová | | 1:05.68 | Q |
| 8 | 2 | 2 | Rebecca Ejdervik | | 1:06.18 | Q |
| 9 | 2 | 7 | Tera van Beilen | | 1:06.24 | |
| 10 | 2 | 8 | Sophie Allen | | 1:06.42 | |
| 11 | 1 | 6 | Samantha Marshall | | 1:06.48 | |
| 12 | 2 | 1 | Jenna Laukkanen | | 1:06.75 | |
| 13 | 1 | 7 | Valentina Artemyeva | | 1:06.94 | |
| 14 | 1 | 1 | Ji Liping | | 1:07.25 | |
| 15 | 1 | 2 | Dilara Buse Günaydın | | 1:07.27 | |
| 1 | 8 | Zhao Jin | | | |
Final
The final was held at 19:00.
| Rank | Lane | Name | Nationality | Time | Notes |
| 5 | Rūta Meilutytė | LTU | 1:03.52 | CR, ER |
| 3 | Alia Atkinson | JAM | 1:03.80 | NR |
| 4 | Rikke Møller Pedersen | DEN | 1:04.05 | NR |
| 4 | 6 | Sarah Katsoulis | AUS | 1:05.01 | |
| 5 | 2 | Jessica Hardy | USA | 1:05.08 | |
| 6 | 7 | Jennie Johansson | SWE | 1:05.62 | |
| 7 | 8 | Rebecca Ejdervik | SWE | 1:06.07 | |
| 8 | 1 | Petra Chocová | CZE | 1:06.12 | |
