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

The heats for the women's 50 m backstroke race at the 2009 World Championships took place in the morning and evening of 29 July, with the final in the evening session of 30 July at the Foro Italico in Rome, Italy.

## Records

Prior to this competition, the existing world and competition records were as follows:
| World record | Daniela Samulski (GER) | 27.61 | Berlin, Germany | 26 June 2009 |
| Championship record | Leila Vaziri (USA) | 28.16 | Melbourne, Australia | 28 March 2007 |
| Championship record | Leila Vaziri (USA) | 28.16 | Melbourne, Australia | 29 March 2007 |
The following records were established during the competition:
| Date | Round | Name | Nationality | Time | Record |
| 28 July | Final* | Anastasia Zuyeva | Russia | 28.13 | CR |
| 29 July | Heat 12 | Zhao Jing | China | 27.85 | CR |
| 29 July | Heat 13 | Aleksandra Gerasimenya | Belarus | 27.65 | CR |
| 29 July | Semifinal 1 | Daniela Samulski | Germany | 27.39 | WR |
| 29 July | Semifinal 2 | Anastasia Zuyeva | Russia | 27.38 | WR |
| 30 July | Final | Zhao Jing | China | 27.06 | WR |
* Split from the women's 100 m backstroke

## Results
### Heats

| Rank | Name | Nationality | Time | Heat | Lane | Notes |
| 1 | Aleksandra Gerasimenya | Belarus | 27.65 | 13 | 2 | CR |
| 2 | Daniela Samulski | Germany | 27.70 | 13 | 4 | |
| 2 | Anastasia Zuyeva | Russia | 27.70 | 14 | 4 | |
| 4 | Sophie Edington | Australia | 27.82 | 14 | 3 | |
| 5 | Zhao Jing | China | 27.85 | 12 | 4 | |
| 6 | Hayley McGregory | USA | 27.88 | 12 | 5 | |
| 7 | Fabíola Molina | Brazil | 27.94 | 14 | 2 | SA |
| 8 | Aya Terakawa | Japan | 27.95 | 13 | 5 | |
| 9 | Gao Chang | China | 28.02 | 14 | 5 | |
| 10 | Gemma Spofforth | Great Britain | 28.19 | 12 | 3 | |
| 11 | Hinkelien Schreuder | Netherlands | 28.23 | 12 | 6 | |
| 12 | Emily Seebohm | Australia | 28.25 | 13 | 6 | |
| 13 | Elena Gemo | Italy | 28.27 | 12 | 7 | NR |
| 14 | Sanja Jovanović | Croatia | 28.28 | 12 | 2 | |
| 15 | Shiho Sakai | Japan | 28.31 | 13 | 3 | |
| 16 | Mercedes Peris | Spain | 28.51 | 14 | 6 | |
| 17 | Ingvild Snildal | Norway | 28.55 | 12 | 9 | NR |
| 18 | Fabienne Nadarajah | Austria | 28.72 | 14 | 8 | NR |
| 19 | Elizabeth Simmonds | Great Britain | 28.78 | 13 | 7 | |
| 20 | Maria Gromova | Russia | 28.80 | 13 | 8 | |
| 21 | Etiene Medeiros | Brazil | 28.82 | 14 | 7 | |
| 22 | Elizabeth Pelton | USA | 28.86 | 11 | 6 | |
| 23 | Yekaterina Rudenko | Kazakhstan | 29.01 | 14 | 1 | |
| 24 | Klara Vaclavikova | Czech Republic | 29.05 | 14 | 9 | |
| 25 | Alicja Tchorz | Poland | 29.07 | 12 | 8 | |
| 26 | Pernille Jessing Larsen | Denmark | 29.08 | 11 | 2 | |
| 27 | Marica Strazmester | Serbia | 29.09 | 11 | 5 | |
| 27 | Ranomi Kromowidjojo | Netherlands | 29.09 | 13 | 1 | |
| 29 | Martina Moravcová | Slovakia | 29.12 | 11 | 4 | |
| 29 | Laura Letrari | Italy | 29.12 | 12 | 1 | |
| 31 | Fernanda González | Mexico | 29.13 | 10 | 3 | NR |
| 32 | Iryna Amshennikova | Ukraine | 29.14 | 11 | 8 | |
| 33 | Simona Baumrtova | Czech Republic | 29.19 | 14 | 0 | |
| 34 | Hanna-Maria Seppälä | Finland | 29.20 | 10 | 5 | |
| 34 | Lim Shana Jia Yi | Singapore | 29.20 | 11 | 7 | =NR |
| 36 | Magdalena Kuras | Sweden | 29.26 | 10 | 6 | |
| 36 | Katharina Stiberg | Norway | 29.26 | 11 | 1 | |
| 38 | Tao Li | Singapore | 29.28 | 8 | 4 | |
| 39 | Sinead Russell | Canada | 29.45 | 11 | 3 | |
| 40 | Anastasiya Prilepa | Kazakhstan | 29.49 | 9 | 0 | |
| 41 | Ivana Gabrilo | Switzerland | 29.51 | 11 | 9 | |
| 41 | Daryna Zevina | Ukraine | 29.51 | 13 | 9 | |
| 43 | Kiera Aitken | Bermuda | 29.55 | 10 | 8 | NR |
| 44 | Carolina Colorado Henao | Colombia | 29.57 | 10 | 4 | |
| 45 | Rugilė Mileišytė | Lithuania | 29.58 | 7 | 0 | NR |
| 46 | Aisling Cooney | Ireland | 29.69 | 10 | 9 | |
| 47 | Riia-Rosa Koskelainen | Finland | 29.70 | 11 | 0 | |
| 48 | Aleksandra Kovaleva | Belarus | 29.73 | 10 | 0 | |
| 49 | Tsai Hiu Wai Sherry | Hong Kong | 29.74 | 13 | 0 | |
| 50 | Jeserick Pinto | Venezuela | 29.77 | 9 | 2 | |
| 51 | Katarina Milly | Slovakia | 29.83 | 9 | 3 | |
| 51 | Alana Dillette | Bahamas | 29.83 | 9 | 9 | NR |
| 53 | Gabrielle Soucisse | Canada | 29.84 | 12 | 0 | |
| 54 | Maja Sovinek | Slovenia | 29.90 | 9 | 5 | |
| 55 | Ekaterina Avramova | Bulgaria | 29.91 | 10 | 1 | |
| 56 | Juanita Barreto Barreto | Colombia | 29.92 | 9 | 6 | |
| 57 | Klaudia Nazieblo | Poland | 29.93 | 10 | 2 | |
| 58 | Sarah Rolko | Luxembourg | 30.02 | 9 | 4 | |
| 59 | Dana Gales | Luxembourg | 30.22 | 8 | 3 | |
| 60 | Lau Yin Yan Claudia | Hong Kong | 30.26 | 10 | 7 | |
| 61 | Dina Hegazy | Egypt | 30.29 | 8 | 1 | |
| 62 | Amit Ivry | Israel | 30.32 | 9 | 8 | |
| 63 | Siona Huxley | Saint Lucia | 30.39 | 7 | 2 | NR |
| 64 | Kätlin Sepp | Estonia | 30.42 | 8 | 6 | |
| 65 | Gizem Cam | Turkey | 30.48 | 9 | 7 | |
| 66 | Anna-Liisa Põld | Estonia | 30.49 | 2 | 1 | |
| 67 | Yulduz Kuchkarova | Uzbekistan | 30.52 | 8 | 5 | |
| 68 | Anna Volchkov | Israel | 30.59 | 7 | 9 | |
| 69 | Chen Ting | Chinese Taipei | 30.63 | 9 | 1 | |
| 70 | Maria Virginia Baez Franco | Paraguay | 30.88 | 7 | 6 | |
| 71 | Mónica Ramírez | Andorra | 30.92 | 7 | 3 | |
| 72 | Diana Chang | Ecuador | 30.95 | 8 | 2 | |
| 73 | Nicole Horn | Zimbabwe | 30.98 | 5 | 8 | |
| 74 | Anna-Liza Mopio-Jane | Papua New Guinea | 31.08 | 7 | 4 | |
| 75 | Elimar Barrios | Venezuela | 31.11 | 8 | 7 | |
| 76 | Silvie Ketelaars | Netherlands Antilles | 31.18 | 8 | 8 | |
| 77 | Nishani Cicilson | Suriname | 31.30 | 6 | 4 | NR |
| 78 | Kendese Nangle | Jamaica | 31.53 | 8 | 0 | |
| 79 | Amina Meho | Lebanon | 31.56 | 7 | 1 | |
| 80 | Chinyere Pigot | Suriname | 31.84 | 3 | 4 | |
| 81 | Dalia Torrez | Nicaragua | 32.04 | 6 | 2 | |
| 82 | Nicol Cremona | Malta | 32.05 | 7 | 7 | |
| 83 | Sylvia Brunlehner | Kenya | 32.06 | 5 | 4 | |
| 83 | ariha Zaman | India | 32.06 | 7 | 5 | |
| 85 | Rachita Shah | Kenya | 32.15 | 4 | 2 | |
| 86 | Karla Toscano | Guatemala | 32.16 | 6 | 7 | |
| 87 | Kirsten Lapham | Zimbabwe | 32.19 | 6 | 9 | |
| 88 | Khadidiatou Dieng | Senegal | 32.20 | 5 | 5 | |
| 89 | Birita Debes | Faroe Islands | 32.27 | 6 | 0 | |
| 90 | Long Chi Wun | Macau | 32.33 | 6 | 6 | |
| 91 | Karen Vilorio | Honduras | 32.34 | 6 | 5 | |
| 92 | Jonay Briedenhann | Namibia | 32.36 | 6 | 8 | |
| 93 | Anahit Barseghyan | Armenia | 32.47 | 7 | 8 | |
| 94 | Cheyenne Rova | Fiji | 32.57 | 5 | 6 | |
| 95 | Rebecca Sharpe | Bermuda | 32.69 | 8 | 9 | |
| 96 | Jade Ashleigh Howard | Zambia | 32.92 | 4 | 5 | |
| 97 | Sophia Noel | Grenada | 32.95 | 5 | 9 | |
| 98 | Che Lok In | Macau | 33.03 | 5 | 1 | |
| 99 | Angelique Trinquier | Monaco | 33.04 | 4 | 4 | |
| 100 | Mareme Faye | Senegal | 33.07 | 5 | 2 | |
| 101 | Sara Abdullahu | Albania | 33.10 | 2 | 4 | NR |
| 102 | Kiran Khan | Pakistan | 33.39 | 6 | 3 | |
| 103 | Adele Rova | Fiji | 33.41 | 5 | 3 | |
| 104 | Jessika Cossa | Mozambique | 33.73 | 4 | 8 | |
| 105 | Ana Euceda Gutierrez | Honduras | 33.75 | 5 | 7 | |
| 106 | Faina Salate | Mozambique | 33.80 | 3 | 6 | |
| 107 | Ruth Carvalho | Angola | 33.96 | 6 | 1 | |
| 108 | Shannon Austin | Seychelles | 34.01 | 4 | 0 | |
| 109 | Kathryn Millin | Eswatini | 34.22 | 3 | 2 | |
| 110 | Stephanie Rasoamanana | Madagascar | 34.23 | 4 | 3 | |
| 111 | Danielle Bernadine Findlay | Zambia | 34.67 | 4 | 7 | |
| 112 | Amnahliyani Mohamad Husain | Brunei | 34.83 | 3 | 3 | |
| 113 | Rachael Glenister | American Samoa | 34.89 | 3 | 8 | |
| 114 | Estellah Fils Rabetsara | Madagascar | 35.00 | 5 | 0 | |
| 115 | Judith Ilan Meauri | Papua New Guinea | 35.02 | 3 | 7 | |
| 116 | Debra Daniel | Micronesia | 35.20 | 4 | 1 | |
| 117 | Maria Grace Koh | Brunei | 35.25 | 4 | 6 | |
| 118 | Sabine Hazboun | Palestine | 35.79 | 4 | 9 | |
| 119 | Sausan Aishath | Maldives | 35.87 | 2 | 7 | |
| 120 | Reni Jani | Albania | 35.99 | 2 | 5 | |
| 121 | Osisang Chilton | Palau | 36.32 | 1 | 5 | |
| 122 | Rida Mitha | Pakistan | 36.34 | 3 | 5 | |
| 123 | Ifiezibe Gagbe | Nigeria | 36.57 | 3 | 1 | |
| 124 | Amelie Trinquier | Monaco | 36.60 | 3 | 0 | |
| 125 | Olivia Infield | Uganda | 36.61 | 2 | 2 | |
| 125 | Seng Sam Phors | Cambodia | 36.61 | 2 | 8 | |
| 127 | Melissa Peacock | Marshall Islands | 36.83 | 3 | 9 | |
| 128 | Gouri Kotecha | Tanzania | 37.07 | 1 | 3 | |
| 129 | Shaila Rana | Nepal | 37.29 | 2 | 3 | |
| 130 | Clarissa Brady | Marshall Islands | 37.64 | 2 | 6 | |
| 131 | Mariam Foum | Tanzania | 38.25 | 1 | 4 | |
| 132 | Yanet Gebremedhin | Ethiopia | 40.80 | 2 | 0 | |
| – | Khurelbaatar Sainzaya | Mongolia | DSQ | 1 | 6 | |

### Semifinals

| Rank | Name | Nationality | Time | Heat | Lane | Notes |
| 1 | Anastasia Zuyeva | Russia | 27.38 | 2 | 5 | WR |
| 2 | Daniela Samulski | Germany | 27.39 | 1 | 4 | NR |
| 3 | Sophie Edington | Australia | 27.51 | 1 | 5 | OC |
| 4 | Aleksandra Gerasimenya | Belarus | 27.57 | 2 | 4 | |
| 5 | Zhao Jing | China | 27.59 | 2 | 3 | AS |
| 6 | Gao Chang | China | 27.66 | 2 | 2 | |
| 7 | Emily Seebohm | Australia | 27.70 | 1 | 7 | |
| 7 | Fabíola Molina | Brazil | 27.70 | 2 | 6 | AM |
| 9 | Aya Terakawa | Japan | 27.73 | 1 | 6 | NR |
| 10 | Hinkelien Schreuder | Netherlands | 27.77 | 2 | 7 | NR |
| 11 | Hayley McGregory | United States | 27.83 | 1 | 3 | |
| 12 | Shiho Sakai | Japan | 27.88 | 2 | 8 | |
| 13 | Gemma Spofforth | Great Britain | 27.92 | 1 | 2 | NR |
| 14 | Sanja Jovanović | Croatia | 28.19 | 1 | 1 | |
| 15 | Mercedes Peris | Spain | 28.28 | 1 | 8 | |
| 16 | Elena Gemo | Italy | 28.32 | 2 | 1 | |

### Final

| Rank | Name | Nationality | Time | Lane | Notes |
| | Zhao Jing | China | 27.06 | 2 | WR |
| | Daniela Samulski | Germany | 27.23 | 5 | ER |
| | Gao Chang | China | 27.28 | 7 | |
| 4 | Anastasia Zuyeva | Russia | 27.31 | 4 | NR |
| 5 | Aleksandra Gerasimenya | Belarus | 27.62 | 6 | |
| 6 | Sophie Edington | Australia | 27.73 | 3 | |
| 7 | Emily Seebohm | Australia | 27.83 | 1 | |
| 8 | Fabíola Molina | Brazil | 27.88 | 8 | |