Swimming at the 2011 World Aquatics Championships – Women's 50 metre breaststroke
The women's 50 metre breaststroke competition of the swimming events at the 2011 World Aquatics Championships was held on July 30 with the heats and the semifinals and July 31 with the final.Records
Prior to the competition, the existing world and championship records were as follows.
| Name | Nation | Time | Location | Date |
| World record | Jessica Hardy | | 29.80 | Federal Way | August 7, 2009 |
| Championship record | Yuliya Yefimova | | 30.09 | Rome | August 2, 2009 |
Results
Heats
36 swimmers participated in 5 heats.
| Rank | Heat | Lane | Name | Nationality | Time | Notes |
| 1 | 5 | 4 | Jessica Hardy | | 30.20 | Q |
| 2 | 3 | 4 | Yuliya Yefimova | | 30.72 | Q |
| 2 | 4 | 5 | Rebecca Soni | | 30.72 | Q |
| 4 | 5 | 3 | Jennie Johansson | | 30.89 | Q, NR |
| 5 | 5 | 5 | Leisel Jones | | 30.93 | Q |
| 6 | 4 | 4 | Leiston Pickett | | 31.07 | Q |
| 7 | 4 | 3 | Rebecca Ejdervik | | 31.19 | Q |
| 8 | 3 | 3 | Kate Haywood | | 31.30 | Q |
| 9 | 3 | 6 | Liu Xiaoyu | | 31.32 | Q |
| 10 | 4 | 6 | Moniek Nijhuis | | 31.40 | Q |
| 10 | 5 | 6 | Zhao Jin | | 31.40 | Q |
| 12 | 5 | 7 | Petra Chocova | | 31.41 | Q |
| 13 | 5 | 8 | Sycerika McMahon | | 31.49 | Q, NR |
| 14 | 4 | 7 | Rikke Pedersen | | 31.65 | Q |
| 15 | 3 | 8 | Suzaan van Biljon | | 31.96 | Q |
| 16 | 3 | 1 | Jane Trepp | | 32.00 | Q |
| 17 | 5 | 1 | Erla Haraldsdottir | | 32.10 | |
| 18 | 3 | 7 | Stephanie Spahn | | 32.14 | |
| 19 | 2 | 5 | Danielle Beaubrun | | 32.27 | NR |
| 20 | 4 | 8 | Loh Christina | | 32.29 | |
| 21 | 3 | 2 | Kim Dal-Eun | | 32.43 | |
| 22 | 4 | 1 | Anastasia Christoforou | | 32.69 | |
| 23 | 2 | 6 | Ivana Ninkovic | | 32.86 | |
| 24 | 2 | 3 | Lei On Kei | | 32.90 | |
| 25 | 2 | 4 | Patricia Casellas | | 33.62 | |
| 26 | 2 | 2 | Jamila Lunkuse | | 36.65 | |
| 27 | 2 | 1 | Mariana Henriques | | 37.23 | |
| 28 | 2 | 7 | Oksana Hatamkhanova | | 37.94 | |
| 29 | 1 | 4 | Antoinette Guedia Mouafo | | 40.15 | |
| 30 | 1 | 5 | Angelika Sita Ouedraogo | | 40.93 | |
| 31 | 2 | 8 | Dede Camara | | 44.44 | |
| 32 | 1 | 6 | Vilayphone Vongphachanh | | 46.37 | |
| 33 | 1 | 2 | Angele Gbenou | | 46.90 | |
| 34 | 1 | 7 | Nafissa Adamou | | 51.24 | |
| – | 3 | 5 | Dorothea Brandt | | | DNS |
| – | 4 | 2 | Jillian Tyler | | | DNS |
| – | 5 | 2 | Satomi Suzuki | | | DNS |
| – | 1 | 3 | Ingrid Outtara | | | DSQ |
Semifinals
The semifinals were held at 18:16.Semifinal 1
Semifinal 2
Final
The final was held at 18:02.
| Rank | Lane | Name | Nationality | Time | Notes |
| 4 | Jessica Hardy | | 30.19 | |
| 3 | Yuliya Yefimova | | 30.49 | |
| 5 | Rebecca Soni | | 30.58 | |
| 4 | 6 | Leiston Pickett | | 30.74 | |
| 5 | 7 | Jennie Johansson | | 30.89 | =NR |
| 6 | 2 | Leisel Jones | | 31.01 | |
| 7 | 1 | Moniek Nijhuis | | 31.33 | |
| 8 | 8 | Rebecca Ejdervik | | 31.45 | |
