# Swimming at the 2007 World Aquatics Championships – Women's 50 metre backstroke

The Women's 50m Backstroke at the 2007 World Aquatics Championships took place on 28 March (prelims & semifinals) and the evening of 29 March (finals) at the Rod Laver Arena in Melbourne, Australia. 95 swimmers were entered in the event, of which, 93 swam.
The USA's Natalie Coughlin established a new Championship Record for the distance (28.30) the day prior to the event, with her split from the women's 100m Back final. The record for the distance had been 28.31 by China's Gao Chang from the 2005 Worlds.
Existing records at the start of the event started were:
* World Record (WR): 28.19, Janine Pietsch (Germany), 25 May 2005 in Berlin, Germany.
* Championship Record (CR): 28.30, Natalie Coughlin (USA), Melbourne 2007 (27 March 2007)

## Results
### Finals

| Place | Name | Nationality | Time | Note |
| 1 | Leila Vaziri | USA | 28.16 | =WR |
| 2 | Aleksandra Gerasimenya | Belarus | 28.46 | |
| 3 | Tayliah Zimmer | Australia | 28.50 | |
| 4 | Zhao Jing | China | 28.54 | |
| 5 | Reiko Nakamura | Japan | 28.64 | |
| 6 | Gao Chang | China | 28.70 | |
| 7 | Mai Nakamura | Japan | 28.86 | |
| 8 | Janine Pietsch | Germany | 28.87 | |

### Semifinals

| Rank | Swimmer | Nation | Time | Note |
| 1 | Leila Vaziri | USA | 28.16 | Q WR |
| 2 | Aleksandra Gerasimenya | Belarus | 28.38 | Q |
| 3 | Reiko Nakamura | Japan | 28.58 | Q |
| 4 | Mai Nakamura | Japan | 28.59 | Q |
| 5 | Janine Pietsch | Germany | 28.72 | Q |
| 6 | Zhao Jing | China | 28.74 | Q |
| 7 | Tayliah Zimmer | Australia | 28.78 | Q |
| 8 | Gao Chang | China | 28.81 | Q |
| 9 | Anastasia Zuyeva | Russia | 28.85 | |
| 10 | Iryna Amshennikova | Ukraine | 28.91 | |
| 11 | Margaret Hoelzer | USA | 28.94 | |
| 12 | Antje Buschschulte | Germany | 29.00 | |
| 13 | Fabíola Molina | Brazil | 29.02 | |
| 14 | Emily Seebohm | Australia | 29.04 | |
| 15 | Hannah McLean | New Zealand | 29.22 | |
| 16 | Elena Gemo | Italy | 29.94 | |

### Preliminaries

| Rank | Swimmer | Nation | Time | Note |
| 1 | Leila Vaziri | USA | 28.25 | Q, CR |
| 2 | Aleksandra Gerasimenya | Belarus | 28.71 | Q |
| 3 | Laure Manaudou | France | 28.84 | Q |
| 4 | Janine Pietsch | Germany | 28.85 | Q |
| 4 | Reiko Nakamura | Japan | 28.85 | Q |
| 6 | Mai Nakamura | Japan | 28.89 | Q |
| 7 | Margaret Hoelzer | USA | 28.93 | Q |
| 7 | Emily Seebohm | Australia | 28.93 | Q |
| 9 | ZHOA Jing | China | 29.00 | Q |
| 9 | Tayliah Zimmer | Australia | 29.00 | Q |
| 11 | Iryna Amshennikova | Ukraine | 29.01 | Q |
| 12 | GAO Chang | China | 29.02 | Q |
| 13 | Fabíola Molina | Brazil | 29.04 | Q |
| 14 | Anastasia Zuyeva | Russia | 29.05 | Q |
| 15 | Hannah McLean | New Zealand | 29.14 | Q |
| 16 | Antje Buschschulte | Germany | 29.22 | Q |
| 17 | Elena Gemo | Italy | 29.25 | |
| 18 | Kateryna Zubkova | Ukraine | 29.37 | |
| 19 | Louise Ørnstedt | Denmark | 29.38 | |
| 20 | Hiu Wai Sherry Tsai | Hong Kong | 29.39 | |
| 21 | Nikolett Szepesi | Hungary | 29.46 | |
| 21 | Mercedes Peris | Spain | 29.46 | |
| 23 | Sanja Jovanović | Croatia | 29.52 | |
| 24 | Fabienne Nadarajah | Austria | 29.54 | |
| 25 | Hinkelien Schreuder | Netherlands | 29.61 | |
| 26 | TAO Li | Singapore | 29.63 | |
| 27 | Karin Prinsloo | South Africa | 29.66 | |
| 28 | Liz Coster | New Zealand | 29.73 | |
| 29 | Kelly Stefanyshyn | Canada | 29.77 | |
| 30 | Anna Gostomelsky | Israel | 29.84 | |
| 31 | Esther Baron | France | 29.88 | |
| 32 | Tine Bossuyt | Belgium | 30.00 | |
| 33 | Evelyn Verrasztó | Hungary | 30.03 | |
| 34 | Triin Aljand | Estonia | 30.04 | |
| 35 | Nam Eun Lee | South Korea | 30.19 | |
| 36 | Iwona Lefanowicz | Poland | 30.33 | |
| 37 | Jorina Aerents | Belgium | 30.38 | |
| 38 | Yoo Jin Jung | South Korea | 30.39 | |
| 39 | Therese Svendsen | Sweden | 30.44 | |
| 40 | Chanelle Van Wyk | South Africa | 30.52 | |
| 41 | Lynette Ng | Singapore | 30.53 | |
| 42 | Kiera Aitken | Bermuda | 30.61 | |
| 43 | Carolina Colorado Henao | Colombia | 30.67 | |
| 44 | Carin Moller | Sweden | 30.73 | |
| 45 | Caroline Pickering Puamau | Fiji | 31.07 | |
| 46 | Natalie Ferdinand | Barbados | 31.13 | |
| 47 | Massie Milagros Carrillo | Peru | 31.14 | |
| 48 | Nazli Ege Calisal | Turkey | 31.40 | |
| 49 | Melanie Nocher | Ireland | 31.52 | |
| 50 | Felicia Leksono | Indonesia | 31.68 | |
| 51 | LIN Man Hsu | Chinese Taipei | 31.69 | |
| 52 | Lourdes Villaseñor | Mexico | 31.94 | |
| 53 | Wenika Kaewchaiwong | Thailand | 32.08 | |
| 54 | Khadija Ciss | Senegal | 32.14 | |
| 55 | Layla Alghul | Jordan | 32.18 | |
| 56 | Cheok Mei Ma | Macau | 32.22 | |
| 56 | Obia Inyengivyikabo | Nigeria | 32.22 | |
| 58 | Christie Bodden | Panama | 32.29 | |
| 59 | Weng Kuan | Macau | 32.35 | |
| 60 | Hsu Jung He | Chinese Taipei | 32.43 | |
| 61 | Sook Fun Chai | Malaysia | 32.46 | |
| 62 | Kiran Khan | Pakistan | 32.61 | |
| 63 | Jonay Briedenhann | Namibia | 32.70 | |
| 64 | Olga Gnedovskaya | Uzbekistan | 32.76 | |
| 65 | Jessica Teixeira Vieira | Mozambique | 32.93 | |
| 65 | Slavica Pavic | Peru | 32.93 | |
| 67 | Siona Huxley | Saint Lucia | 33.10 | |
| 68 | Thi Cuc Hoang | Vietnam | 33.18 | |
| 69 | Maria Virginia Baez Franco | Paraguay | 33.58 | |
| 70 | Parita Parekh | India | 33.75 | |
| 71 | Lacy Palmer-Martin | Saint Lucia | 33.94 | |
| 72 | Marie Laura Meza Peraza | Costa Rica | 33.98 | |
| 73 | Rachel Fortunato | Gibraltar | 34.12 | |
| 74 | April Chang | Samoa | 34.17 | |
| 75 | Ekaterina Mamatkulova | Uzbekistan | 34.30 | |
| 76 | Talisa Pace | Malta | 34.56 | |
| 77 | Mercedes Milner | Zambia | 34.80 | |
| 78 | Dalia Massiel Torrez Zamora | Nicaragua | 34.85 | |
| 79 | Debra Daniel | FS Micronesia | 34.98 | |
| 80 | Anouchka Diane Etiennette | Mauritius | 35.18 | |
| 81 | Mirjana Stojanova | Macedonia | 35.24 | |
| 82 | Uche Monu | Nigeria | 35.33 | |
| 83 | Judith Meauri | Papua New Guinea | 35.39 | |
| 84 | Maxine Pardo | Gibraltar | 35.73 | |
| 85 | Patricia Wellman | Zambia | 36.07 | |
| 86 | Telmen Batjargal | Mongolia | 36.67 | |
| 87 | Amber Sikosang Yobech | Palau | 36.97 | |
| 88 | Natasha Ratter | Uganda | 37.42 | |
| 89 | Kelly How Tam Fat | Mauritius | 37.52 | |
| 90 | Sainzaya Khurelbaatar | Mongolia | 37.80 | |
| 91 | Sarah Elizabeth Johnson | Northern Mariana Islands | 37.86 | |
| 92 | Teran Matthews | Saint Vincent    and the Grenadines | 39.02 | |
| 93 | Olga Hachatryan | Turkmenistan | 39.48 | |
| -- | Gloria Koussihouede | Benin | DNS | |
| -- | Anisa Curraj | Albania | DNS | |