2012 FINA World Swimming Championships (25 m) – Women's 100 metre butterfly
The women's 100 metre butterfly event at the 11th FINA World Swimming Championships took place 15 - 16 December 2012 at the Sinan Erdem Dome.Records
Prior to this competition, the existing world and championship records were as follows.
No new records were set during this competition.Results
Heats
| Rank | Heat | Lane | Name | Time | Notes |
| 1 | 7 | 8 | | 57.31 | Q |
| 2 | 7 | 7 | | 57.32 | Q |
| 3 | 5 | 4 | | 57.53 | Q |
| 4 | 5 | 5 | | 57.58 | Q |
| 5 | 6 | 5 | | 57.81 | Q |
| 6 | 5 | 3 | | 57.83 | Q |
| 7 | 7 | 6 | | 57.87 | Q |
| 8 | 7 | 5 | | 58.01 | Q |
| 9 | 6 | 7 | | 58.10 | Q |
| 10 | 6 | 4 | | 58.15 | Q |
| 11 | 6 | 9 | | 58.22 | Q |
| 12 | 6 | 6 | | 58.34 | Q |
| 13 | 5 | 2 | | 58.36 | Q |
| 14 | 6 | 3 | | 58.39 | Q |
| 15 | 4 | 6 | | 58.50 | Q |
| 16 | 7 | 3 | | 58.54 | Q |
| 17 | 6 | 2 | | 58.71 | |
| 18 | 2 | 0 | | 58.85 | |
| 19 | 5 | 8 | | 58.87 | NR |
| 20 | 6 | 1 | | 58.96 | |
| 21 | 5 | 7 | | 59.09 | |
| 21 | 6 | 0 | | 59.09 | |
| 23 | 7 | 9 | | 59.25 | |
| 24 | 7 | 2 | | 59.26 | |
| 25 | 7 | 0 | | 59.31 | |
| 26 | 2 | 8 | | 59.45 | |
| 27 | 7 | 1 | | 59.74 | |
| 28 | 5 | 0 | | 59.80 | |
| 29 | 5 | 6 | | 1:00.01 | |
| 30 | 5 | 9 | | 1:00.18 | |
| 31 | 6 | 8 | | 1:00.77 | |
| 32 | 4 | 3 | | 1:00.89 | |
| 33 | 4 | 5 | | 1:01.06 | |
| 34 | 4 | 7 | | 1:01.08 | |
| 35 | 4 | 2 | | 1:01.24 | |
| 36 | 3 | 5 | | 1:01.51 | |
| 37 | 3 | 3 | | 1:02.07 | NR |
| 38 | 4 | 1 | | 1:03.14 | |
| 39 | 3 | 2 | | 1:03.30 | |
| 40 | 4 | 4 | | 1:03.31 | |
| 41 | 4 | 9 | | 1:03.38 | |
| 42 | 4 | 8 | | 1:03.45 | |
| 43 | 4 | 0 | | 1:04.33 | |
| 44 | 3 | 6 | | 1:04.41 | |
| 45 | 3 | 8 | | 1:05.28 | |
| 46 | 3 | 4 | | 1:05.61 | |
| 47 | 3 | 0 | | 1:05.76 | |
| 48 | 3 | 1 | | 1:06.32 | |
| 49 | 1 | 5 | | 1:06.71 | |
| 50 | 2 | 4 | | 1:06.87 | |
| 51 | 3 | 9 | | 1:09.11 | |
| 52 | 3 | 7 | | 1:09.60 | |
| 53 | 2 | 5 | | 1:10.32 | |
| 54 | 2 | 2 | | 1:10.79 | |
| 55 | 2 | 7 | | 1:11.94 | |
| 56 | 2 | 3 | | 1:12.37 | |
| 57 | 2 | 1 | | 1:13.40 | |
| 58 | 2 | 6 | | 1:14.00 | |
| 1 | 3 | | | |
| 1 | 4 | | | |
| 5 | 1 | | | |
| 7 | 4 | | | |
Semifinals
| Rank | Heat | Lane | Name | Nationality | Time | Notes |
| 1 | 1 | 2 | Ilaria Bianchi | | 56.60 | Q |
| 2 | 1 | 4 | Noemie It-Ting Thomas | | 56.64 | Q, NR |
| 3 | 2 | 5 | Jemma Lowe | | 57.16 | Q |
| 4 | 2 | 4 | Liu Zige | | 57.24 | Q |
| 5 | 1 | 5 | Claire Donahue | | 57.51 | Q |
| 6 | 2 | 1 | Silvia di Pietro | | 57.62 | Q |
| 7 | 1 | 3 | Kathleen Hersey | | 57.65 | Q |
| 8 | 2 | 3 | Louise Hansson | | 57.79 | |
| 9 | 1 | 8 | Veronika Popova | | 57.82 | |
| 10 | 2 | 6 | Daynara de Paula | | 57.87 | Q |
| 11 | 2 | 2 | Nao Kobayashi | | 57.99 | |
| 12 | 1 | 7 | Emilia Pikkarainen | | 58.04 | NR |
| 13 | 1 | 6 | Katerine Savard | | 58.13 | |
| 14 | 1 | 1 | Birgit Koschischek | | 58.40 | |
| 15 | 2 | 8 | Sze Hang Yu | | 58.66 | |
| 16 | 2 | 7 | Kona Fujita | | 58.71 | |
Final
The final was held at 19:49.
| Rank | Lane | Name | Nationality | Time | Notes |
| 4 | Ilaria Bianchi | ITA | 56.13 | NR |
| 6 | Liu Zige | CHN | 56.58 | |
| 3 | Jemma Lowe | GBR | 56.66 | |
| 4 | 5 | Noemie It-Ting Thomas | CAN | 56.92 | |
| 5 | 2 | Claire Donahue | USA | 57.00 | |
| 6 | 1 | Kathleen Hersey | USA | 57.35 | |
| 7 | 7 | Silvia di Pietro | ITA | 58.14 | |
| 8 | 8 | Daynara de Paula | BRA | 59.64 | |
