2012 FINA World Swimming Championships (25 m) – Women's 50 metre butterfly
The women's 50 metre butterfly event at the 11th FINA World Swimming Championships took place 13 - 14 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 | Therese Alshammar | | 24.38 | Singapore | 22 November 2009 |
| Championship record | Therese Alshammar | | 24.87 | Dubai | 17 December 2010 |
No new records were set during this competition.Results
Heats
| Rank | Heat | Lane | Name | Time | Notes |
| 1 | 9 | 6 | | 25.76 | Q, NR |
| 2 | 9 | 4 | | 25.83 | Q |
| 3 | 7 | 5 | | 25.87 | Q |
| 4 | 8 | 4 | | 26.02 | Q |
| 5 | 9 | 5 | | 26.05 | Q |
| 6 | 7 | 4 | | 26.06 | Q |
| 7 | 8 | 6 | | 26.15 | Q, NR |
| 7 | 8 | 2 | | 26.15 | Q |
| 9 | 8 | 1 | | 26.17 | Q |
| 10 | 8 | 5 | | 26.20 | Q |
| 11 | 9 | 3 | | 26.28 | Q |
| 12 | 3 | 9 | | 26.36 | Q |
| 13 | 7 | 3 | | 26.38 | Q |
| 14 | 7 | 7 | | 26.39 | Q |
| 15 | 8 | 3 | | 26.43 | Q |
| 16 | 7 | 1 | | 26.54 | Q |
| 17 | 6 | 6 | | 26.58 | |
| 18 | 9 | 7 | | 26.60 | |
| 19 | 9 | 2 | | 26.62 | |
| 20 | 7 | 2 | | 26.66 | |
| 21 | 7 | 6 | | 26.71 | |
| 22 | 8 | 8 | | 26.73 | |
| 23 | 8 | 7 | | 26.74 | |
| 24 | 9 | 8 | | 26.86 | |
| 25 | 7 | 8 | | 26.90 | |
| 26 | 3 | 8 | | 27.25 | |
| 27 | 8 | 9 | | 27.26 | |
| 28 | 6 | 3 | | 27.39 | |
| 28 | 9 | 1 | | 27.39 | |
| 30 | 7 | 9 | | 27.44 | |
| 31 | 6 | 5 | | 27.46 | |
| 32 | 7 | 0 | | 27.49 | |
| 33 | 6 | 4 | | 27.57 | |
| 34 | 9 | 9 | | 27.83 | |
| 35 | 8 | 0 | | 27.90 | |
| 36 | 9 | 0 | | 28.04 | |
| 37 | 5 | 1 | | 28.62 | |
| 38 | 5 | 3 | | 28.81 | |
| 39 | 6 | 0 | | 29.01 | |
| 40 | 6 | 2 | | 29.13 | |
| 41 | 6 | 8 | | 29.34 | |
| 42 | 5 | 4 | | 29.43 | |
| 43 | 1 | 4 | | 29.46 | |
| 44 | 5 | 2 | | 29.56 | |
| 45 | 5 | 7 | | 29.65 | |
| 46 | 6 | 7 | | 29.67 | |
| 47 | 2 | 8 | | 29.73 | |
| 48 | 6 | 1 | | 29.79 | |
| 49 | 5 | 0 | | 29.80 | |
| 50 | 5 | 9 | | 29.84 | |
| 51 | 5 | 8 | | 29.96 | |
| 52 | 4 | 6 | | 30.25 | |
| 53 | 4 | 5 | | 30.26 | |
| 54 | 6 | 9 | | 30.35 | |
| 55 | 4 | 4 | | 30.61 | |
| 56 | 3 | 3 | | 30.80 | |
| 57 | 4 | 8 | | 30.81 | |
| 58 | 3 | 0 | | 30.99 | |
| 59 | 4 | 1 | | 31.00 | |
| 60 | 4 | 3 | | 31.02 | |
| 61 | 2 | 4 | | 31.32 | |
| 62 | 5 | 6 | | 31.37 | |
| 63 | 1 | 3 | | 31.46 | |
| 64 | 4 | 7 | | 31.49 | |
| 65 | 4 | 0 | | 31.62 | |
| 66 | 2 | 6 | | 31.90 | |
| 67 | 4 | 9 | | 32.29 | |
| 68 | 2 | 5 | | 32.59 | |
| 69 | 2 | 2 | | 33.13 | |
| 70 | 3 | 4 | | 33.21 | |
| 71 | 3 | 2 | | 33.92 | |
| 72 | 1 | 6 | | 34.76 | |
| 73 | 3 | 5 | | 35.03 | |
| 74 | 3 | 6 | | 36.29 | |
| 75 | 3 | 7 | | 36.78 | |
| 76 | 3 | 1 | | 36.90 | |
| 77 | 2 | 3 | | 43.00 | |
| 78 | 2 | 7 | | 46.64 | |
| 79 | 1 | 5 | | 54.54 | |
| 2 | 0 | | | |
| 2 | 1 | | | |
| 4 | 2 | | | |
| 5 | 5 | | | |
Semifinals
| Rank | Heat | Lane | Name | Nationality | Time | Notes |
| 1 | 1 | 5 | Jeanette Ottesen | | 25.62 | Q |
| 2 | 1 | 4 | Christine Magnuson | | 25.65 | Q |
| 2 | 2 | 5 | Lu Ying | | 25.65 | Q |
| 4 | 2 | 4 | Noemie It-Ting Thomas | | 25.76 | Q, NR |
| 5 | 2 | 6 | Anna Dowgiert | | 25.82 | Q, NR |
| 6 | 1 | 6 | Claire Donahue | | 25.84 | Q |
| 7 | 1 | 7 | Jiao Liuyang | | 25.93 | Q |
| 8 | 2 | 1 | Triin Aljand | | 25.96 | Q |
| 9 | 2 | 7 | Louise Hansson | | 25.97 | |
| 10 | 1 | 1 | Aleksandra Urbanczyk | | 26.00 | |
| 11 | 1 | 3 | Aleksandra Gerasimenya | | 26.01 | |
| 11 | 2 | 3 | Silvia di Pietro | | 26.01 | |
| 13 | 1 | 2 | Ilaria Bianchi | | 26.02 | |
| 14 | 2 | 2 | Vanessa Mohr | | 26.16 | |
| 15 | 1 | 8 | Brianna Throssell | | 26.17 | |
| 16 | 2 | 8 | Daynara de Paula | | 26.40 | |
Final
The final was held at 19:43.
| Rank | Lane | Name | Nationality | Time | Notes |
| 3 | Lu Ying | CHN | 25.14 | |
| 1 | Jiao Liuyang | CHN | 25.23 | |
| 4 | Jeanette Ottesen | DEN | 25.55 | |
| 4 | 6 | Noemie It-Ting Thomas | CAN | 25.60 | NR |
| 5 | 5 | Christine Magnuson | USA | 25.70 | |
| 6 | 7 | Claire Donahue | USA | 25.88 | |
| 7 | 2 | Anna Dowgiert | POL | 25.90 | |
| 8 | 8 | Triin Aljand | EST | 26.01 | |
