# Swimming at the 2009 World Aquatics Championships – Women's 50 metre breaststroke

The heats for the women's 50 m breaststroke race at the 2009 World Championships took place in the morning of 1 August, with the final in the evening session of 2 August at the Foro Italico in Rome, Italy.

## Records

Prior to this competition, the existing world and competition records were as follows:
| World record | Amanda Reason (CAN) | 30.23 | Montreal, Canada | 8 July 2009 |
| Championship record | Jade Edmistone (AUS) | 30.45 | Montreal, Canada | 31 July 2005 |
The following records were established during the competition:
| Date | Round | Name | Nationality | Time | Record |
| 1 August | Heat 10 | Kasey Carlson | United States | 30.34 | CR |
| 1 August | Heat 12 | Yuliya Yefimova | Russia | 30.24 | CR |
| 2 August | Final | Yuliya Yefimova | Russia | 30.09 | WR |

## Results
### Heats

| Rank | Name | Nationality | Time | Heat | Lane | Notes |
| 1 | Yuliya Yefimova | Russia | 30.24 | 12 | 4 | CR, ER |
| 2 | Kasey Carlson | USA | 30.34 | 10 | 6 | NR |
| 3 | Sarah Katsoulis | Australia | 30.48 | 10 | 5 | |
| 4 | Moniek Nijhuis | Netherlands | 30.57 | 12 | 3 | NR |
| 5 | Amanda Reason | Canada | 30.73 | 10 | 4 | |
| 6 | Kerstin Vogel | Germany | 30.77 | 10 | 7 | NR |
| 7 | Rebecca Soni | USA | 30.82 | 11 | 6 | |
| 8 | Tarnee White | Australia | 30.96 | 12 | 5 | |
| 9 | Annamay Pierse | Canada | 31.02 | 11 | 5 | |
| 10 | Sophie de Ronchi | France | 31.06 | 12 | 6 | |
| 11 | Valentina Artemyeva | Russia | 31.10 | 11 | 4 | |
| 12 | Georgia Holderness | Great Britain | 31.11 | 7 | 5 | |
| 12 | Katharina Stiberg | Norway | 31.11 | 9 | 4 | NR |
| 14 | Roberta Panara | Italy | 31.13 | 12 | 2 | |
| 15 | Katja Lehtonen | Finland | 31.14 | 9 | 6 | |
| 16 | Lowri Tynan | Great Britain | 31.15 | 8 | 5 | |
| 17 | Rikke Moller-Pedersen | Denmark | 31.23 | 11 | 0 | NR |
| 18 | Concepcion Badillo | Spain | 31.27 | 11 | 7 | |
| 19 | Inna Kapishina | Belarus | 31.29 | 9 | 7 | |
| 20 | Achieng Ajulu-Bushell | Kenya | 31.30 | 10 | 0 | NR |
| 21 | Jane Trepp | Estonia | 31.32 | 9 | 2 | NR |
| 21 | Mirna Jukić | Austria | 31.32 | 10 | 8 | NR |
| 21 | Caroline Ruhnau | Germany | 31.32 | 12 | 1 | |
| 24 | Ana Carla Carvalho | Brazil | 31.38 | 12 | 7 | |
| 25 | Angeliki Exarchou | Greece | 31.52 | 9 | 5 | NR |
| 26 | Kim Daleun | Korea | 31.55 | 10 | 2 | |
| 27 | Tatiane Sakemi | Brazil | 31.61 | 11 | 3 | |
| 28 | Hitomi Nose | Japan | 31.68 | 10 | 1 | |
| 29 | Ewa Scieszko | Poland | 31.69 | 8 | 4 | |
| 29 | Petra Chocova | Czech Republic | 31.69 | 10 | 9 | |
| 31 | Rebecca Ejdervik | Sweden | 31.77 | 11 | 8 | |
| 32 | Wang Randi | China | 31.79 | 11 | 2 | |
| 33 | Kim Hyejin | Korea | 31.82 | 9 | 1 | |
| 34 | Yekaterina Sadovnik | Kazakhstan | 31.85 | 7 | 6 | |
| 35 | Anastasia Christoforou | Cyprus | 31.87 | 9 | 3 | |
| 36 | Joline Höstman | Sweden | 31.88 | 12 | 9 | |
| 37 | Yuliya Banach | Israel | 31.98 | 9 | 8 | NR |
| 37 | Martina Carraro | Italy | 31.98 | 11 | 1 | |
| 39 | Ana Marisa Brito | Portugal | 32.00 | 11 | 9 | |
| 40 | Elise Matthysen | Belgium | 32.12 | 8 | 6 | NR |
| 41 | Joana Carvalho | Portugal | 32.24 | 12 | 0 | |
| 42 | Urte Kazakeviciute | Lithuania | 32.37 | 7 | 7 | NR |
| 43 | Doaa Reda Masarwa | Israel | 32.46 | 8 | 8 | |
| 44 | Raminta Dvariskyte | Lithuania | 32.53 | 7 | 2 | |
| 45 | Tanja Šmid | Slovenia | 32.55 | 8 | 0 | |
| 46 | Sarra Lajnef | Tunisia | 32.68 | 7 | 4 | NR |
| 47 | Hrafnhildur Lúthersdóttir | Iceland | 32.71 | 8 | 3 | |
| 48 | Alicia Lightbourne | Bahamas | 32.84 | 6 | 7 | NR |
| 49 | Anna Khlistunova | Ukraine | 32.87 | 7 | 1 | |
| 50 | Roanne Ho | Singapore | 32.93 | 9 | 9 | |
| 51 | Daniela Victoria | Venezuela | 32.95 | 8 | 1 | |
| 52 | Martina Dankova | Czech Republic | 32.97 | 7 | 0 | |
| 53 | Lei On Kei | Macau | 33.34 | 6 | 5 | |
| 54 | Agnieszka Ostrowska | Poland | 33.36 | 7 | 8 | |
| 55 | Veronica Vdovicenco | Moldova | 33.46 | 8 | 7 | |
| 56 | Jonay Briedenhann | Namibia | 33.50 | 6 | 8 | NR |
| 57 | Kimba Collymore | Trinidad and Tobago | 33.61 | 6 | 4 | |
| 58 | Maxine Heard | Zimbabwe | 33.70 | 5 | 5 | NR |
| 59 | Carolina Colorado Henao | Colombia | 33.93 | 7 | 9 | |
| 59 | Dilara Buse Gunaydin | Turkey | 33.93 | 8 | 9 | |
| 61 | Danielle Beaubrun | Saint Lucia | 33.95 | 6 | 2 | |
| 62 | Daniela Lindemeier | Namibia | 34.12 | 5 | 4 | |
| 63 | Cherelle Thompson | Trinidad and Tobago | 34.87 | 6 | 6 | |
| 64 | Maria Zenoni | Dominican Republic | 34.93 | 5 | 1 | NR |
| 65 | Labake Anthonia Oriretan | Nigeria | 34.95 | 5 | 8 | |
| 66 | Monica Bernardo | Mozambique | 35.07 | 4 | 5 | |
| 67 | Racheal Tonjor | Nigeria | 35.15 | 5 | 0 | |
| 68 | Cheryl Lim | Singapore | 35.20 | 6 | 9 | |
| 69 | Selma Atic | Bosnia and Herzegovina | 35.72 | 6 | 1 | |
| 70 | Nibal Yamout | Lebanon | 35.74 | 6 | 3 | |
| 71 | Melinda Sue Micallef | Malta | 35.77 | 5 | 3 | |
| 72 | Nilshaira Isenia | Netherlands Antilles | 35.87 | 6 | 0 | |
| 73 | Amanda Jia Xin Liew | Brunei | 35.90 | 4 | 7 | NR |
| 74 | Karla Toscano | Guatemala | 36.35 | 5 | 2 | |
| 75 | Karen Vilorio | Honduras | 36.55 | 5 | 7 | |
| 76 | Doli Akhter | Bangladesh | 36.62 | 4 | 3 | |
| 77 | Ana Euceda Gutierrez | Honduras | 36.74 | 4 | 2 | |
| 78 | Gantumur Oyungerel | Mongolia | 37.00 | 3 | 7 | |
| 79 | Stephanie Rasoamanana | Madagascar | 37.17 | 5 | 6 | |
| 80 | Clarissa Brady | Marshall Islands | 37.29 | 4 | 6 | |
| 81 | Jessika Cossa | Mozambique | 37.81 | 3 | 5 | |
| 82 | Mirella Alam | Lebanon | 37.88 | 5 | 9 | |
| 83 | Tea Pikuli | Albania | 37.94 | 4 | 0 | |
| 84 | Debora Keci | Albania | 38.24 | 4 | 4 | |
| 85 | Jamila Lunkuse | Uganda | 38.90 | 3 | 2 | |
| 86 | Mariam Foum | Tanzania | 39.07 | 2 | 0 | |
| 87 | Adele Rova | Fiji | 39.09 | 3 | 3 | |
| 88 | Rayleen David | Federated States of Micronesia | 39.42 | 2 | 5 | |
| 89 | Jade Ashleigh Howard | Zambia | 39.51 | 3 | 4 | |
| 90 | Noelle Anyika Smith | Guyana | 40.39 | 3 | 0 | |
| 91 | Sabine Hazboun | Palestine | 40.61 | 4 | 9 | |
| 92 | Danielle Bernadine Findlay | Zambia | 40.65 | 3 | 6 | |
| 93 | Murugaperumal Venpa | India | 40.67 | 4 | 1 | |
| 94 | Julia Alves | Marshall Islands | 41.08 | 2 | 3 | |
| 95 | Debra Daniel | Federated States of Micronesia | 41.43 | 2 | 4 | |
| 96 | Amnahliyani Mohamad Husain | Bahrain | 41.65 | 3 | 8 | |
| 97 | Aelia Mehdi | Pakistan | 41.81 | 3 | 9 | |
| 98 | Maria Gibbons | Palau | 41.85 | 2 | 6 | |
| 99 | Aqsa Tariq | Pakistan | 42.55 | 3 | 1 | |
| 100 | Angele Gbenou Mahutin | Benin | 43.26 | 1 | 6 | |
| 101 | Angelika Sita Ouedraogo | Burkina Faso | 44.71 | 1 | 5 | |
| 102 | Aicha Oumar Coulibaly | Mali | 46.12 | 2 | 1 | |
| 103 | Svetlana Dogadkina | Tajikistan | 46.51 | 7 | 3 | |
| 104 | Ismail Aminath Inas | Maldives | 46.91 | 2 | 2 | |
| 105 | Awa Keita | Mali | 47.48 | 1 | 4 | |
| 106 | Catherine Decker | Tanzania | 48.23 | 2 | 8 | |
| 107 | Antja Flowers | Palau | 48.25 | 2 | 7 | |
| – | Elsa Partio Fatima Traore | Burkina Faso | DQ | 1 | 3 | |
| – | Ouleye Diallo | Senegal | DNS | 4 | 8 | |
| – | Sara Nordenstam | Norway | DNS | 8 | 2 | |
| – | Maria Georgia Michalaka | Greece | DNS | 9 | 0 | |
| – | Chen Huijia | China | DNS | 10 | 3 | |
| – | Nanaka Tamura | Japan | DNS | 12 | 8 | |

### Semifinals

| Rank | Name | Nationality | Time | Heat | Lane | Notes |
| 1 | Sarah Katsoulis | Australia | 30.33 | 2 | 5 | |
| 2 | Moniek Nijhuis | Netherlands | 30.38 | 1 | 5 | NR |
| 3 | Yuliya Yefimova | Russia | 30.40 | 2 | 4 | |
| 4 | Amanda Reason | Canada | 30.42 | 2 | 3 | |
| 5 | Kasey Carlson | United States | 30.46 | 1 | 4 | |
| 6 | Rebecca Soni | United States | 30.56 | 2 | 6 | |
| 7 | Tarnee White | Australia | 30.80 | 1 | 6 | |
| 8 | Valentina Artemyeva | Russia | 30.92 | 2 | 7 | |
| 8 | Annamay Pierse | Canada | 30.92 | 2 | 2 | |
| 10 | Lowri Tynan | Great Britain | 31.03 | 1 | 8 | |
| 11 | Kerstin Vogel | Germany | 31.04 | 1 | 3 | |
| 12 | Katharina Stiberg | Norway | 31.09 | 2 | 1 | NR |
| 13 | Sophie de Ronchi | France | 31.12 | 1 | 2 | |
| 14 | Roberta Panara | Italy | 31.16 | 1 | 1 | |
| 15 | Georgia Holderness | Great Britain | 31.25 | 1 | 7 | |
| 16 | Katja Lehtonen | Finland | 31.37 | 2 | 8 | |

#### Swim-off

| Rank | Name | Nationality | Time | Lane | Notes |
| 1 | Annamay Pierse | Canada | 30.98 | 5 | |
| 2 | Valentina Artemyeva | Russia | 30.99 | 4 | |

### Final

| Rank | Name | Nationality | Time | Lane | Notes |
| | Yuliya Yefimova | Russia | 30.09 | 3 | WR |
| | Rebecca Soni | United States | 30.11 | 7 | AM |
| | Sarah Katsoulis | Australia | 30.16 | 4 | OC |
| 4 | Moniek Nijhuis | Netherlands | 30.46 | 5 | |
| 5 | Annamay Pierse | Canada | 30.53 | 8 | |
| 6 | Kasey Carlson | United States | 30.65 | 2 | |
| 7 | Amanda Reason | Canada | 30.67 | 6 | |
| 8 | Tarnee White | Australia | 30.91 | 1 | |