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

The women's 100 metre freestyle competition at the 2007 World Aquatics Championships was held on 29 and 30 March 2007 at the Rod Laver Arena in Melbourne, Australia. 135 swimmers were entered in the event.

## Records

Prior to the competition, the existing world and championship records were as follows.
| World record | Britta Steffen (GER) | 53.30 | Budapest, Hungary | 2 August 2006 |
| Competition record | Le Jingyi (CHN) | 54.01 | Rome, Italy | 5 September 1994 |
The following records were established during the competition:
| Date | Round | Name | Nationality | Time | Record |
| 25 March | Final* | Libby Lenton | Australia | 53.42 | CR |
| 29 March | Semifinal 2 | Natalie Coughlin | United States | 53.40 | CR |
| 30 March | Final | Libby Lenton | Australia | 53.40 | =CR |
* Split from the women's 4 × 100 m freestyle relay

## Finals

| Place | Lane | Name | Nationality | Split (50m) | Time | Note |
| | 5 | Lisbeth Lenton | Australia | 25.38 | 53.40 | CR |
| | 2 | Marleen Veldhuis | Netherlands | 25.15 | 53.70 | |
| | 3 | Britta Steffen | Germany | 25.76 | 53.74 | |
| 4 | 4 | Natalie Coughlin | United States | 25.56 | 53.87 | |
| 5 | 6 | Erica Morningstar | Canada | 25.84 | 54.10 | |
| 6 | 7 | Jodie Henry | Australia | 26.07 | 54.21 | |
| 7 | 8 | Josefin Lillhage | Sweden | 26.25 | 54.67 | |
| 8 | 1 | Malia Metella | France | 25.84 | 54.77 | |

## Semifinals

| Rank | Heat (Lane) | Name | Nationality | 50m | Time | Notes |
| 1 | 2 (4) | Natalie Coughlin | USA | 25.67 | 53.40 | Q CR, AM |
| 2 | 2 (5) | Lisbeth Lenton | Australia | 25.55 | 53.85 | Q |
| 3 | 1 (5) | Britta Steffen | Germany | 25.77 | 54.05 | Q |
| 4 | 1 (4) | Erica Morningstar | Canada | 25.98 | 54.08 | Q |
| 5 | 1 (6) | Marleen Veldhuis | Netherlands | 25.81 | 54.17 | Q |
| 6 | 1 (3) | Jodie Henry | Australia | 26.32 | 54.23 | Q |
| 7 | 1 (1) | Malia Metella | France | 26.26 | 54.61 | Q |
| 7 | 2 (3) | Josefin Lillhage | Sweden | 26.25 | 54.61 | Q |
| 9 | 2 (6) | Francesca Halsall | Great Britain | 25.98 | 54.85 | |
| 10 | 1 (2) | Alena Popchanka | France | 26.61 | 54.99 | |
| 11 | 2 (7) | Xu Yanwei | China | 26.20 | 55.10 | |
| 12 | 1 (7) | Hanna-Maria Seppälä | Finland | 26.16 | 55.31 | |
| 13 | 2 (1) | Ranomi Kromowidjojo | Netherlands | 26.68 | 55.33 | |
| 14 | 2 (8) | Aleksandra Gerasimenya | Belarus | 26.10 | 55.39 | |
| 15 | 2 (2) | Amanda Weir | USA | 26.39 | 55.47 | |
| 16 | 1 (8) | Vanessa García | Puerto Rico | 26.25 | 56.27 | |

## Preliminaries

| Rank | Heat (Lane) | Name | Nationality | 50m | Time | Q |
| 1 | 16 (5) | Natalie Coughlin | USA | 25.91 | 00:54.04 | Q |
| 2 | 16 (7) | Erica Morningstar | Canada | 26.24 | 00:54.30 | Q |
| 3 | 16 (4) | Lisbeth Lenton | Australia | 25.96 | 00:54.32 | Q |
| 4 | 17 (4) | Britta Steffen | Germany | 26.37 | 00:54.60 | Q |
| 5 | 15 (2) | Josefin Lillhage | Sweden | 26.44 | 00:54.74 | Q |
| 6 | 17 (5) | Jodie Henry | Australia | 26.60 | 00:54.76 | Q |
| 7 | 17 (6) | Fran Halsall | Great Britain | 26.29 | 00:54.80 | Q |
| 8 | 15 (5) | Marleen Veldhuis | Netherlands | 25.84 | 00:54.89 | Q |
| 9 | 15 (4) | Amanda Weir | USA | 26.37 | 00:55.03 | Q |
| 10 | 16 (3) | Alena Popchanka | France | 26.52 | 00:55.11 | Q |
| 11 | 15 (6) | Xu Yanwei | China | 26.47 | 00:55.24 | Q |
| 12 | 17 (2) | Hanna-Maria Seppälä | Finland | 26.56 | 00:55.33 | Q |
| 13 | 14 (7) | Ranomi Kromowidjojo | Netherlands | 26.47 | 00:55.38 | Q |
| 14 | 16 (2) | Malia Metella | France | 26.71 | 00:55.57 | Q |
| 15 | 15 (7) | Aleksandra Gerasimenya | Belarus | 26.43 | 00:55.59 | Q |
| 16 | 17 (1) | Vanessa García | Puerto Rico | 26.31 | 00:55.69 | Q |
| 17 | 12 (4) | Jeanette Ottesen | Denmark | 26.78 | 00:55.99 | |
| 18 | 16 (6) | Pang Jiaying | China | 26.83 | 00:56.03 | |
| 18 | 17 (8) | Lauren Boyle | New Zealand | 27.19 | 00:56.03 | |
| 20 | 12 (6) | Ragnheidur Ragnarsdottir | Iceland | 26.80 | 00:56.06 | |
| 21 | 13 (1) | Jana Myskova | Czech Republic | 27.36 | 00:56.24 | |
| 22 | 16 (8) | Victoria Poon | Canada | 26.61 | 00:56.30 | |
| 23 | 13 (3) | Arlene Semeco | Venezuela | 26.75 | 00:56.35 | |
| 24 | 14 (6) | Keo Ra Lee | South Korea | 27.66 | 00:56.44 | |
| 25 | 13 (4) | Sviatlana Khakhlova | Belarus | 26.49 | 00:56.52 | |
| 25 | 15 (3) | Martina Moravcová | Slovakia | 27.10 | 00:56.52 | |
| 27 | 11 (3) | Ganna Dzerkal | Ukraine | 26.95 | 00:56.53 | |
| 28 | 17 (7) | Cristina Chiuso | Italy | 26.84 | 00:56.56 | |
| 29 | 15 (8) | Magdalena Kuras | Sweden | 26.81 | 00:56.58 | |
| 30 | 13 (5) | Jana Kolukanova | Estonia | 26.94 | 00:56.67 | |
| 31 | 12 (3) | Birgit Koschischek | Austria | 27.23 | 00:56.75 | |
| 32 | 12 (1) | Elina Partõka | Estonia | 27.60 | 00:56.90 | |
| 32 | 14 (5) | Flávia Delaroli | Brazil | 26.63 | 00:56.90 | |
| 34 | 10 (8) | Karin Prinsloo | South Africa | 27.54 | 00:57.06 | |
| 35 | 14 (8) | Hannah Wilson | Hong Kong | 27.44 | 00:57.08 | |
| 36 | 12 (7) | Miroslava Najdanovski | Serbia | 26.83 | 00:57.11 | |
| 36 | 16 (1) | Ionela Cozma | Romania | 27.23 | 00:57.11 | |
| 38 | 14 (2) | Jorina Aerents | Belgium | 27.48 | 00:57.18 | |
| 39 | 13 (7) | Haruka Ueda | Japan | 27.97 | 00:57.21 | |
| 40 | 14 (3) | Petra Klosova | Czech Republic | 27.55 | 00:57.28 | |
| 41 | 12 (2) | Oxana Serikova | Ukraine | 27.04 | 00:57.29 | |
| 42 | 13 (2) | Chin Kuei Yang | Chinese Taipei | 27.51 | 00:57.30 | |
| 43 | 12 (5) | Olga Shulgina | Russia | 27.62 | 00:57.48 | |
| 44 | 10 (5) | Melanie Nocher | Ireland | 27.90 | 00:57.72 | |
| 45 | 11 (6) | Caroline Pickering Puamau | Fiji | 27.83 | 00:57.85 | |
| 45 | 14 (4) | Emily Vavourakis | Belgium | 27.69 | 00:57.85 | |
| 47 | 13 (8) | Pin Chieh Nieh | Chinese Taipei | 28.23 | 00:57.93 | |
| 48 | 8 (1) | Heather Brand | Zimbabwe | 27.84 | 00:57.95 | |
| 49 | 12 (8) | Jiratida Phinyosophon | Thailand | 28.10 | 00:58.03 | |
| 50 | 11 (5) | Sarah Yasmine Chahed | Tunisia | 27.74 | 00:58.07 | |
| 51 | 11 (8) | Loren Bahamonde | Ecuador | 28.32 | 00:58.21 | |
| 52 | 11 (4) | Hang Yu Sze | Hong Kong | 27.67 | 00:58.25 | |
| 53 | 9 (4) | Madeleine Scerri | Malta | 28.77 | 00:58.47 | |
| 54 | 9 (3) | Carolina Colorado Henao | Colombia | 27.92 | 00:58.60 | |
| 55 | 14 (1) | Heysi Villarreal Navarro | Cuba | 28.04 | 00:58.61 | |
| 56 | 9 (6) | Natasha Moodie | Jamaica | 28.38 | 00:58.65 | |
| 57 | 11 (7) | Anna Stylianou | Cyprus | 28.05 | 00:58.78 | |
| 58 | 10 (6) | Alexia Pamela Benitez Quijada | El Salvador | 28.48 | 00:58.84 | |
| 59 | 10 (2) | Charlotte Johannsen | Denmark | 28.30 | 00:58.85 | |
| 60 | 10 (7) | Mylene Ong | Singapore | 28.50 | 00:59.01 | |
| 61 | 10 (3) | Ximena Vilar | Venezuela | 27.98 | 00:59.10 | |
| 62 | 10 (4) | Nicole Marmol Gilbert | Ecuador | 28.08 | 00:59.25 | |
| 63 | 11 (1) | Pannika Prachgosin | Thailand | 28.72 | 00:59.48 | |
| 64 | 7 (1) | Sharntelle McLean | Trinidad and Tobago | 28.43 | 00:59.51 | |
| 65 | 11 (2) | Cecilia Elizabeth Biagioli | Argentina | 28.52 | 00:59.52 | |
| 66 | 10 (1) | Shu Yong Ho | Singapore | 28.57 | 00:59.55 | |
| 67 | 8 (3) | Anna-Liza Mopio-Jane | Papua New Guinea | 28.15 | 00:59.84 | |
| 68 | 9 (7) | Irina Shlemova | Uzbekistan | 28.55 | 00:59.90 | |
| 69 | 9 (1) | Raffaella Rodoni Palma | Chile | 29.17 | 1:00.08 | |
| 70 | 8 (5) | Kimberly Eeson | Zimbabwe | 28.71 | 1:00.09 | |
| 70 | 8 (8) | Ellen Hight | Zambia | 28.79 | 1:00.09 | |
| 72 | 7 (5) | Marianella Quesada Barrantes | Costa Rica | 28.87 | 1:00.10 | |
| 73 | 6 (5) | Felicia Leksono | Indonesia | 28.37 | 1:00.49 | |
| 74 | 8 (4) | Cheok Mei Ma | Macau | 28.73 | 1:00.52 | |
| 75 | 7 (8) | Marie Laura Meza Peraza | Costa Rica | 29.23 | 1:00.69 | |
| 76 | 7 (6) | Elena Popovska | Macedonia | 29.36 | 1:00.73 | |
| 77 | 8 (6) | Nancy Suryaatmadja | Indonesia | 28.87 | 1:00.80 | |
| 78 | 9 (5) | Khadija Ciss | Senegal | 29.15 | 1:01.05 | |
| 79 | 3 (6) | Kshipra Mahajan | India | 29.37 | 1:01.51 | |
| 80 | 6 (1) | Ximene Vaz Gomez | Mozambique | 29.63 | 1:01.55 | |
| 80 | 6 (8) | Davina Mangion | Malta | 30.16 | 1:01.55 | |
| 82 | 6 (2) | Tuesday Watts | Grenada | 29.22 | 1:01.60 | |
| 83 | 4 (8) | Jessica Teixeira Vieira | Mozambique | 29.44 | 1:01.78 | |
| 84 | 7 (4) | Ngozi Monu | Nigeria | 29.14 | 1:01.88 | |
| 85 | 5 (3) | Emma Hunter | Samoa | 29.42 | 1:01.89 | |
| 86 | 6 (7) | Jonay Briedenhann | Namibia | 29.77 | 1:02.04 | |
| 87 | 6 (4) | Maria Alejandra Torres | Peru | 29.74 | 1:02.17 | |
| 88 | 6 (6) | Nilshaira Isenia | Netherlands Antilles | 29.33 | 1:02.18 | |
| 89 | 5 (2) | Parita Parekh | India | 29.33 | 1:02.27 | |
| 90 | 8 (2) | Miriam Hatamleh | Jordan | 29.99 | 1:02.29 | |
| 91 | 8 (7) | Rachel Ah Koy | Fiji | 29.87 | 1:02.41 | |
| 92 | 7 (2) | Fiorella Gomez−Sanchez | Peru | 30.20 | 1:02.52 | |
| 93 | 5 (5) | Tojohanitra  Andriamanjatoprimamama | Madagascar | 29.45 | 1:02.60 | |
| 94 | 5 (4) | Nicole Ellsworth | Papua New Guinea | 30.14 | 1:02.89 | |
| 95 | 6 (3) | Matana Wellman | Zambia | 29.31 | 1:02.99 | |
| 96 | 4 (1) | Mona Simonsen | Faroe Islands | 30.56 | 1:03.01 | |
| 97 | 3 (5) | Dashtserengiin Saintsetseg | Mongolia | 30.15 | 1:03.04 | |
| 98 | 4 (4) | Shannon Austin | Seychelles | 30.51 | 1:03.09 | |
| 99 | 5 (6) | Marike Meyer | Namibia | 30.58 | 1:03.46 | |
| 100 | 7 (3) | Sook Fun Chai | Malaysia | 30.50 | 1:03.69 | |
| 101 | 5 (1) | Rovena Marku | Albania | 30.36 | 1:03.72 | |
| 102 | 4 (2) | Dalia Massiel Torrez Zamora | Nicaragua | 30.31 | 1:03.84 | |
| 103 | 4 (7) | Karen Torrez | Bolivia | 30.72 | 1:04.04 | |
| 104 | 7 (7) | Razan Taha | Jordan | 30.20 | 1:04.06 | |
| 105 | 3 (4) | Binta Zahra Diop | Senegal | 30.88 | 1:04.09 | |
| 106 | 4 (5) | Ekaterina Mamatkulova | Uzbekistan | 30.21 | 1:04.17 | |
| 107 | 4 (6) | Dohi Eliane Droubry | Ivory Coast | 30.19 | 1:04.47 | |
| 108 | 2 (4) | Kiran Khan | Pakistan | 30.39 | 1:04.69 | |
| 109 | 2 (5) | Rachel Lannen | Guam | 30.67 | 1:05.23 | |
| 110 | 5 (8) | Uche Monu | Nigeria | 31.47 | 1:05.34 | |
| 111 | 4 (3) | Anouchka Diane Etiennette | Mauritius | 31.01 | 1:05.65 | |
| 112 | 5 (7) | Prisca Rose | Mauritius | 31.38 | 1:05.70 | |
| 113 | 3 (1) | Stephanie Anne Maitland | Seychelles | 30.59 | 1:06.12 | |
| 114 | 3 (8) | Batjargalyn Telmen | Mongolia | 31.83 | 1:06.28 | |
| 115 | 2 (7) | Sarah Elizabeth Johnson | Northern Mariana Islands | 31.91 | 1:06.56 | |
| 116 | 2 (2) | Pina Ercolano | Kenya | 31.80 | 1:06.58 | |
| 117 | 3 (3) | Herinantenaina  Ravoajanahary | Madagascar | 31.79 | 1:06.90 | |
| 118 | 2 (6) | Hussain Aminath Rouya | Maldives | 31.73 | 1:07.11 | |
| 119 | 2 (8) | April Chang | Samoa | 31.97 | 1:07.61 | |
| 120 | 3 (2) | Sameera Albitar | Brunei | 31.67 | 1:09.07 | |
| 121 | 1 (4) | Olivia Aya Nakitanda | Uganda | 33.19 | 1:09.76 | |
| 122 | 2 (1) | Julianne Kirchner | Marshall Islands | 32.98 | 1:10.62 | |
| 123 | 1 (3) | Amber Sikosang Yobech | Palau | 33.53 | 1:10.65 | |
| 124 | 1 (2) | Maria Gibbons | Palau | 34.80 | 1:14.76 | |
| 125 | 1 (1) | Ruth Magdalena Moshi | Tanzania | 35.01 | 1:15.87 | |
| 126 | 1 (5) | Olga Hachatryan | Turkmenistan | 34.01 | 1:16.91 | |
| 127 | 1 (7) | Aminath Inas Ismail | Maldives | 38.33 | 1:22.74 | |
| 128 | 2 (3) | Nahed Akhlif | Libya | 37.48 | 1:25.88 | |
| 999 | 1 (6) | Katerina Izmailova | Tajikistan | DNS | 999 | |
| 999 | 3 (7) | Ana Roxiero | Angola | DNS | 999 | |
| 999 | 9 (2) | Chanelle van Wyk | South Africa | DNS | 999 | |
| 999 | 13 (6) | Maria Fuster Martinez | Spain | DNS | 999 | |
| 999 | 15 (1) | Soraya Abdourahmane | Mauritania | DNS | 999 | |
| 999 | 17 (3) | Petra Dallmann | Germany | DNS | 999 | |
| 999 | 9 (8) | Sharon Paola Fajardo Sierra | Honduras | DSQ | 999 | |