# Swimming at the 2007 World Aquatics Championships – Women's 100 metre backstroke

The Women's 100m Backstroke at the 2007 World Aquatics Championships took place on 26 March (prelims & semifinals) and the evening of 27 March (finals) at the Rod Laver Arena in Melbourne, Australia. 87 swimmers were entered in the event, of which, 86 swam.
Existing records at the start of the event started were:
* World Record (WR): 59.58, Natalie Coughlin (USA), 13 August 2002 in Fort Lauderdale, USA.
* Championship Record (CR): 1:00.00, Natalie Coughlin (USA), Montreal 2005 (30 July 2005)

## Results
### Finals

| Place | Name | Nationality | Time | Note |
| 1st | Natalie Coughlin | USA | 59.44 | WR 50m= 28.30 CR* |
| 2nd | Laure Manaudou | France | 59.87 | ER |
| 3rd | Reiko Nakamura | Japan | 1:00.40 | NR |
| 4th | Emily Seebohm | Australia | 1:00.52 | |
| 5th | Hanae Ito | Japan | 1:00.63 | |
| 6th | Iryna Amshennikova | Ukraine | 1:00.79 | |
| 7th | Anastasia Zuyeva | Russia | 1:01.38 | |
| 8th | Tayliah Zimmer | Australia | 1:02.68 | |
Note: Coughlin's 50m split of 28.30 in the Final, established a new Championship Record for the distance. The existing CR for the distance had been 28.31 by China's Gao Chang from Montreal 2005.

### Semifinals

| Rank | Swimmer | Nation | Time | Note |
| 1 | Emily Seebohm | Australia | 1:00.51 | Q, NR |
| 2 | Laure Manaudou | France | 1:00.55 | Q |
| 3 | Hanae Ito | Japan | 1:00.62 | Q |
| 4 | Natalie Coughlin | USA | 1:00.64 | Q |
| 5 | Reiko Nakamura | Japan | 1:00.71 | Q |
| 6 | Tayliah Zimmer | Australia | 1:01.06 | Q |
| 7 | Iryna Amshennikova | Ukraine | 1:01.21 | Q |
| 8 | Anastasia Zuyeva | Russia | 1:01.23 | Q |
| 9 | Nikolett Szepesi | Hungary | 1:01.29 | |
| 10 | Leila Vaziri | USA | 1:01.39 | |
| 11 | Sanja Jovanović | Croatia | 1:01.59 | |
| 12 | XU Tianlongzi | China | 1:01.70 | |
| 13 | Antje Buschschulte | Germany | 1:01.71 | |
| 14 | Kirsty Coventry | Zimbabwe | 1:01.73 | |
| 15 | Hannah McLean | New Zealand | 1:01.80 | |
| 16 | Kateryna Zubkova | Ukraine | 1:02.04 | |

### Preliminaries

| Rank | Swimmer | Nation | Time | Note |
| 1 | Natalie Coughlin | USA | 1:00.36 | Q |
| 2 | Kirsty Coventry | Zimbabwe | 1:00.57 | Q |
| 3 | Reiko Nakamura | Japan | 1:00.80 | Q |
| 4 | Laure Manaudou | France | 1:00.92 | Q |
| 5 | Hanae Ito | Japan | 1:01.25 | Q |
| 6 | Leila Vaziri | USA | 1:01.36 | Q |
| 7 | Tayliah Zimmer | Australia | 1:01.38 | Q |
| 8 | Iryna Amshennikova | Ukraine | 1:01.43 | Q |
| 9 | Emily Seebohm | Australia | 1:01.70 | Q |
| 10 | Nikolett Szepesi | Hungary | 1:01.74 | Q |
| 11 | Anastasia Zuyeva | Russia | 1:01.89 | Q |
| 12 | Antje Buschschulte | Germany | 1:01.94 | Q |
| 12 | Hannah McLean | New Zealand | 1:01.94 | Q |
| 14 | XU Tianlongzi | China | 1:02.03 | Q |
| 15 | Kateryna Zubkova | Ukraine | 1:02.05 | Q |
| 16 | Sanja Jovanović | Croatia | 1:02.11 | Q |
| 17 | Hiu Wai Sherry Tsai | Hong Kong | 1:02.41 | |
| 18 | Fabíola Molina | Brazil | 1:02.43 | |
| 18 | Elena Gemo | Italy | 1:02.43 | |
| 20 | Louise Ørnstedt | Denmark | 1:02.49 | |
| 21 | Janine Pietsch | Germany | 1:02.72 | |
| 22 | Alessia Filippi | Italy | 1:02.73 | |
| 23 | Esther Baron | France | 1:02.79 | |
| 24 | Elizabeth Simmonds | Great Britain | 1:02.87 | |
| 25 | ZHAO Jing | China | 1:02.98 | |
| 26 | Aliaksandra Kavaleva | Belarus | 1:03.25 | |
| 27 | Karin Prinsloo | South Africa | 1:03.31 | |
| 28 | Kelly Stefanyshyn | Canada | 1:03.38 | |
| 29 | Petra Klosova | Czech Republic | 1:03.40 | |
| 30 | Iwona Lefanowicz | Poland | 1:03.43 | |
| 31 | Anna Gostomelsky | Israel | 1:03.44 | |
| 32 | Carin Möller | Sweden | 1:03.47 | |
| 33 | Liz Coster | New Zealand | 1:03.58 | |
| 34 | Mercedes Peris | Spain | 1:03.69 | |
| 35 | Erin Volcán | Venezuela | 1:03.85 | |
| 36 | Yoo Jin Jung | South Korea | 1:03.97 | |
| 37 | Julia Wilkinson | Canada | 1:04.02 | |
| 38 | Therese Svendsen | Sweden | 1:04.15 | |
| 39 | Carolina Colorado Henao | Colombia | 1:04.39 | |
| 40 | Melanie Nocher | Ireland | 1:04.44 | |
| 41 | Escarlata Bernard Gonzalez | Spain | 1:04.93 | |
| 42 | Nam Eun Lee | South Korea | 1:05.01 | |
| 43 | Hikelien Schreuder | Netherlands | 1:05.09 | |
| 44 | Triin Aljand | Estonia | 1:05.53 | |
| 45 | Kiera Aitken | Bermuda | 1:05.65 | |
| 46 | Lynette Ng | Singapore | 1:05.84 | |
| 47 | Lourdes Villaseñor | Mexico | 1:06.05 | |
| 48 | Valentina Georgiana Brat | Romania | 1:06.19 | |
| 49 | Man Hsu Lin | Chinese Taipei | 1:06.79 | |
| 50 | Caroline Pickering | Fiji | 1:07.27 | |
| 51 | Hsu Jung He | Chinese Taipei | 1:07.28 | |
| 52 | Felicia Leksono | Indonesia | 1:07.32 | |
| 53 | Nazli Ege Calisal | Turkey | 1:07.43 | |
| 54 | Sook Fun Chai | Malaysia | 1:07.85 | |
| 55 | Layla Alghul | Jordan | 1:08.13 | |
| 56 | Natalie Ferdinand | Barbados | 1:08.74 | |
| 57 | Ming Xiu Ong | Malaysia | 1:08.97 | |
| 58 | Christie Bodden | Panama | 1:09.31 | |
| 59 | Slavica Pavic | Peru | 1:09.32 | |
| 60 | Wenika Kaewchaiwong | Thailand | 1:09.47 | |
| 61 | Madelein Scerri | Malta | 1:09.59 | |
| 62 | Massie Milagros Carrillo | Peru | 1:09.75 | |
| 63 | Weng Kuan | Macao | 1:09.83 | |
| 64 | Jonay Briedenhann | Namibia | 1:10.46 | |
| 65 | Karen Torrez | Bolivia | 1:10.78 | |
| 66 | Khadija Ciss | Senegal | 1:11.15 | |
| 67 | Thi Cuc Hoang | Vietnam | 1:11.28 | |
| 68 | Yulduz Kuchkarova | Uzbekistan | 1:11.47 | |
| 69 | Obia Inyengiyikabo | Nigeria | 1:11.61 | |
| 70 | Lacy Palmer-Martin | Saint Lucia | 1:12.07 | |
| 71 | Man Wai Fong | Macao | 1:12.25 | |
| 72 | Jessica Teixeira Vieira | Mozambique | 1:12.32 | |
| 73 | Maria Virginia Baez Franco | Paraguay | 1:12.46 | |
| 74 | Rachel Fortunato | Gibraltar | 1:12.93 | |
| 75 | Marie Laura Meza Peraza | Costa Rica | 1:13.01 | |
| 76 | Mirjana Stojanova | Macedonia | 1:15.07 | |
| 77 | Dalia Massiel Torrez Zamora | Nicaragua | 1:16.20 | |
| 78 | Siona Huxley | Saint Lucia | 1:16.60 | |
| 79 | Binta Zahra Diop | Senegal | 1:16.96 | |
| 80 | Anouchka Diane Etiennette | Mauritius | 1:17.40 | |
| 81 | Uche Monu | Nigeria | 1:17.93 | |
| 82 | Maxine Pardo | Gibraltar | 1:18.24 | |
| 83 | Judith Meauri | Papua New Guinea | 1:19.64 | |
| 84 | Sarah Elizabeth Johnson | Northern Mariana Islands | 1:19.90 | |
| 85 | Amber Sikosang Yobech | Palau | 1:20.78 | |
| 86 | Natasha Ratter | Uganda | 1:2.54 | |
| -- | Aleksandra Gerasimenya | Belarus | DNS | |