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

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

## Records

| World record | Marleen Veldhuis (NED) | 23.96 | Amsterdam, Netherlands | 19 April 2009 |
| Championship record | Inge de Bruijn (NED) | 24.45 | Fukuoka, Japan | 28 July 2001 |
The following records were established during the competition:
| Date | Round | Name | Nationality | Time | Record |
| 1 August | Heat 17 | Cate Campbell | Australia | 24.24 | CR |
| 1 August | Semifinal 1 | Marleen Veldhuis | Netherlands | 24.20 | CR |
| 1 August | Semifinal 2 | Cate Campbell | Australia | 24.08 | CR |
| 2 August | Final | Britta Steffen | Germany | 23.73 | WR |

## Results
### Heats

| Rank | Name | Nationality | Time | Heat | Lane | Notes |
| 1 | Cate Campbell | Australia | 24.24 | 17 | 5 | CR |
| 2 | Therese Alshammar | Sweden | 24.30 | 18 | 5 | |
| 3 | Amanda Weir | United States | 24.36 | 18 | 6 | |
| 4 | Marleen Veldhuis | Netherlands | 24.41 | 18 | 4 | |
| 5 | Britta Steffen | Germany | 24.42 | 18 | 3 | |
| 6 | Francesca Halsall | Great Britain | 24.47 | 17 | 3 | NR |
| 7 | Dara Torres | United States | 24.67 | 17 | 4 | |
| 8 | Jeanette Ottesen | Denmark | 24.72 | 16 | 6 | NR |
| 9 | Libby Trickett | Australia | 24.74 | 16 | 4 | |
| 10 | Hinkelien Schreuder | Netherlands | 24.78 | 16 | 5 | |
| 11 | Aleksandra Gerasimenya | Belarus | 24.85 | 17 | 6 | |
| 12 | Malia Metella | France | 25.01 | 16 | 3 | |
| 13 | Arlene Semeco | Venezuela | 25.11 | 17 | 2 | |
| 14 | Victoria Poon | Canada | 25.15 | 18 | 7 | |
| 15 | Hanna-Maria Seppälä | Finland | 25.17 | 17 | 7 | |
| 16 | Sviatlana Khakhlova | Belarus | 25.19 | 16 | 7 | |
| 17 | Miroslava Najdanovski | Serbia | 25.21 | 15 | 6 | NR |
| 18 | Josefin Lillhage | Sweden | 25.23 | 17 | 8 | |
| 19 | Dar'ya Stepanyuk | Ukraine | 25.32 | 18 | 1 | |
| 20 | Triin Aljand | Estonia | 25.33 | 18 | 8 | |
| 21 | Xu Yanwei | China | 25.41 | 16 | 8 | |
| 22 | Anastasia Aksenova | Russia | 25.46 | 17 | 1 | |
| 23 | Misaki Yamaguchi | Japan | 25.47 | 18 | 9 | |
| 24 | Oksana Serikova | Ukraine | 25.48 | 17 | 9 | |
| 25 | Flávia Delaroli | Brazil | 25.54 | 16 | 2 | |
| 26 | Ragnheidur Ragnarsdottir | Iceland | 25.55 | 15 | 3 | |
| 26 | Arianna Vanderpool-Wallace | Bahamas | 25.55 | 16 | 0 | |
| 28 | Martina Moravcová | Slovakia | 25.63 | 15 | 5 | |
| 29 | Tatiana Barbosa | Brazil | 25.64 | 15 | 4 | |
| 30 | Liliana Ibanez | Mexico | 25.70 | 15 | 1 | NR |
| 30 | Amanda Lim | Singapore | 25.70 | 15 | 9 | |
| 32 | Katarzyna Wilk | Poland | 25.71 | 18 | 0 | |
| 33 | Gigliola Tecchio | Italy | 25.74 | 15 | 7 | |
| 34 | Vanessa García | Puerto Rico | 25.78 | 15 | 0 | |
| 34 | Jolien Sysmans | Belgium | 25.78 | 17 | 0 | |
| 36 | Henriette Brekke | Norway | 25.81 | 14 | 4 | |
| 36 | Emma Wilkins | Great Britain | 25.81 | 16 | 9 | |
| 38 | Sharntelle McLean | Trinidad and Tobago | 25.92 | 14 | 8 | |
| 39 | Cristina Chiuso | Italy | 25.93 | 16 | 1 | |
| 40 | Heather MacLean | Canada | 25.94 | 13 | 8 | |
| 41 | Natasha Moodie | Jamaica | 25.95 | 15 | 8 | =NR |
| 42 | Fabienne Nadarajah | Austria | 25.97 | 14 | 5 | |
| 42 | Lee Jae Young | South Korea | 25.97 | 14 | 3 | |
| 44 | Quah Ting Wen | Singapore | 26.05 | 15 | 2 | |
| 45 | Petra Klosova | Czech Republic | 26.06 | 13 | 5 | |
| 46 | Cecilie Johannessen | Norway | 26.09 | 12 | 3 | |
| 47 | Clare Dawson | Ireland | 26.20 | 12 | 4 | |
| 47 | Yamile Bahamonde | Ecuador | 26.20 | 13 | 9 | |
| 49 | Nina Drolc | Slovenia | 26.22 | 14 | 2 | |
| 50 | Riia-Rosa Koskelainen | Finland | 26.24 | 13 | 1 | |
| 51 | Annelies De Mare | Belgium | 26.27 | 13 | 3 | |
| 52 | Nina Sovinek | Slovenia | 26.30 | 14 | 1 | |
| 52 | Nadia Colovini | Argentina | 26.30 | 14 | 9 | NR |
| 54 | Yayoi Matsumoto | Japan | 26.36 | 14 | 6 | |
| 55 | Fiona Doyle | Ireland | 26.38 | 13 | 2 | |
| 55 | Natthanan Junkrajang | Thailand | 26.38 | 13 | 7 | |
| 57 | Nicole Horn | Zimbabwe | 26.39 | 12 | 2 | |
| 58 | Grite Apanaviciute | Lithuania | 26.43 | 13 | 4 | |
| 59 | Katarina Listopadova | Slovakia | 26.46 | 13 | 0 | |
| 60 | Rugile Mileisyte | Lithuania | 26.48 | 14 | 0 | |
| 61 | Ximena Vilar | Venezuela | 26.52 | 11 | 5 | |
| 62 | Tsai Hiu Wai Sherry | Hong Kong | 26.56 | 13 | 6 | |
| 63 | Aneta Pechancova | Czech Republic | 26.58 | 12 | 7 | |
| 64 | Fella Bennaceur | Algeria | 26.64 | 11 | 4 | |
| 65 | Erika Stewart | Colombia | 26.72 | 7 | 6 | |
| 66 | Farida Osman | Egypt | 26.77 | 11 | 3 | |
| 67 | Kiera Aitken | Bermuda | 26.83 | 11 | 9 | NR |
| 68 | Anna-Liza Mopio-Jane | Papua New Guinea | 26.84 | 12 | 5 | |
| 69 | Chinyere Pigot | Suriname | 26.88 | 11 | 8 | NR |
| 70 | Teisha Lightbourne | Bahamas | 26.97 | 11 | 2 | |
| 71 | Sze Hang Yu | Hong Kong | 26.98 | 12 | 1 | |
| 72 | Kimberley Eeson | Zimbabwe | 27.07 | 11 | 1 | |
| 73 | Pamela Benitez | El Salvador | 27.13 | 11 | 6 | |
| 73 | Leung Chii Lin | Malaysia | 27.13 | 12 | 8 | |
| 75 | Christine Mailliet | Luxembourg | 27.18 | 10 | 2 | |
| 76 | Ashley Bransford | Aruba | 27.20 | 10 | 6 | |
| 76 | Coral del Mar Lopez Rosario | Puerto Rico | 27.20 | 12 | 0 | |
| 78 | Nishani Cicilson | Suriname | 27.22 | 9 | 5 | |
| 79 | Juanita Barreto Barreto | Colombia | 27.31 | 12 | 9 | |
| 80 | Marie Laura Meza | Costa Rica | 27.33 | 9 | 8 | |
| 81 | Dalia Torrez | Nicaragua | 27.36 | 9 | 4 | |
| 82 | Amina Meho | Lebanon | 27.37 | 14 | 7 | |
| 83 | Diana Chang | Ecuador | 27.40 | 10 | 1 | |
| 84 | Marianela Quesada | Costa Rica | 27.43 | 9 | 3 | |
| 84 | Yulduz Kuchkarova | Uzbekistan | 27.43 | 10 | 7 | |
| 86 | Silvie Ketelaars | Netherlands Antilles | 27.45 | 10 | 5 | |
| 87 | Clelia Tini | San Marino | 27.49 | 11 | 0 | |
| 88 | Shaila Millum Gardarnar | Faroe Islands | 27.50 | 10 | 3 | |
| 89 | Monica Bernardo | Mozambique | 27.75 | 7 | 9 | |
| 89 | Sharon Paola Fajardo Sierra | Honduras | 27.75 | 10 | 4 | |
| 91 | Razan Taha | Jordan | 27.81 | 9 | 6 | |
| 92 | Birita Debes | Faroe Islands | 27.93 | 4 | 7 | |
| 93 | Natalya Filina | Azerbaijan | 27.94 | 11 | 7 | |
| 94 | Sylvia Brunlehner | Kenya | 27.95 | 8 | 8 | |
| 95 | Ma Cheok Mei | Macau | 27.97 | 10 | 9 | |
| 96 | Ting Sheng-Yo | Chinese Taipei | 27.99 | 9 | 9 | |
| 97 | Baean Jouma | Syria | 28.04 | 8 | 7 | |
| 97 | Chittaranjan Shubha | India | 28.04 | 9 | 7 | |
| 97 | Talisa Pace | Malta | 28.04 | 10 | 0 | |
| 100 | Miriam Hatamleh | Jordan | 28.10 | 9 | 2 | |
| 101 | Karen Milenka Torrez Guzman | Bolivia | 28.11 | 9 | 1 | |
| 102 | Ouleye Diallo | Senegal | 28.15 | 8 | 9 | |
| 103 | Amanda Jia Xin Liew | Brunei | 28.23 | 6 | 8 | |
| 104 | Melinda Sue Micallef | Malta | 28.28 | 8 | 5 | |
| 105 | Tan Chi Yan | Macau | 28.30 | 8 | 6 | |
| 106 | Nilshaira Isenia | Netherlands Antilles | 28.32 | 8 | 4 | |
| 107 | Khadidiatou Dieng | Senegal | 28.39 | 6 | 6 | |
| 107 | Chen Ting | Chinese Taipei | 28.39 | 8 | 0 | |
| 109 | Judith Ilan Meauri | Papua New Guinea | 28.49 | 6 | 7 | |
| 110 | Talasha Prabhu | India | 28.53 | 8 | 1 | |
| 111 | Kathryn Millin | Eswatini | 28.55 | 7 | 2 | |
| 112 | Noelyn Faussane | French Polynesia | 28.57 | 7 | 4 | |
| 113 | Siona Huxley | Saint Lucia | 28.59 | 7 | 5 | |
| 114 | Cheyenne Rova | Fiji | 28.60 | 6 | 4 | |
| 115 | Adele Rova | Fiji | 28.66 | 5 | 5 | |
| 116 | Sophia Noel | Grenada | 28.68 | 8 | 3 | |
| 116 | Shannon Austin | Seychelles | 28.68 | 9 | 0 | |
| 118 | Christine Briedenhann | Namibia | 28.71 | 7 | 3 | |
| 119 | Graciela Peinado Ibanez | Bolivia | 28.98 | 6 | 5 | |
| 120 | Pina Ercolano | Kenya | 29.02 | 6 | 1 | |
| 121 | Ifiezibe Gagbe | Nigeria | 29.03 | 5 | 3 | |
| 122 | Anahit Barseghyan | Armenia | 29.12 | 6 | 3 | |
| 123 | Rovena Marku | Albania | 29.13 | 8 | 2 | |
| 124 | Amelie Trinquier | Monaco | 29.31 | 4 | 9 | |
| 125 | Angelique Trinquier | Monaco | 29.41 | 6 | 2 | |
| 126 | Gessica Stagno | Mozambique | 29.45 | 3 | 3 | |
| 127 | Yara Dowani | Palestine | 29.68 | 5 | 7 | |
| 128 | Sameera Al Bitar | Bahrain | 29.75 | 4 | 5 | |
| 129 | Li Chuen Cheong Estelle | Mauritius | 29.77 | 5 | 1 | |
| 130 | Tin Hon Ko Adeline Mei-Li | Mauritius | 29.89 | 7 | 0 | |
| 131 | Olivia Infield | Uganda | 29.95 | 2 | 5 | |
| 132 | Kaluarachchilage Don | Sri Lanka | 29.97 | 4 | 0 | |
| 133 | Estellah Fils Rabetsara | Madagascar | 29.99 | 7 | 8 | |
| 134 | Noelle Anyika Smith | Guyana | 30.00 | 3 | 4 | |
| 135 | Ayesha Noel | Grenada | 30.01 | 6 | 9 | |
| 136 | Kiran Khan | Pakistan | 30.06 | 4 | 4 | |
| 137 | Maria Grace Koh | Brunei | 30.17 | 5 | 8 | |
| 137 | Mirella Alam | Lebanon | 30.17 | 7 | 1 | |
| 139 | Doli Akhter | Bangladesh | 30.19 | 4 | 6 | |
| 140 | Rachael Catherine Glenister | American Samoa | 30.20 | 5 | 9 | |
| 141 | Danielle Bernadine Findlay | Zambia | 30.40 | 4 | 2 | |
| 142 | Maria Gibbons | Palau | 30.41 | 4 | 8 | |
| 143 | Sabine Hazboun | Palestine | 30.62 | 5 | 0 | |
| 144 | Miniruwani Samarakoon | Sri Lanka | 30.68 | 4 | 1 | |
| 145 | Vitiny Hemthon | Cambodia | 30.95 | 3 | 8 | |
| 146 | Jamila Lunkuse | Uganda | 30.98 | 2 | 6 | |
| 147 | Reni Jani | Albania | 31.09 | 5 | 2 | |
| 148 | Debra Daniel | Federated States of Micronesia | 31.12 | 2 | 7 | |
| 149 | Oyungerel Gantumur | Mongolia | 31.15 | 7 | 7 | |
| 150 | Julianne Kirchner | Marshall Islands | 31.22 | 4 | 3 | |
| 151 | Katerina Izmailova | Tajikistan | 31.31 | 5 | 6 | |
| 152 | Enkhjargal Khulan | Mongolia | 31.46 | 3 | 5 | |
| 153 | Khurelbaatar Sainzaya | Mongolia | 31.47 | 6 | 0 | |
| 154 | Mariam Foum | Tanzania | 31.65 | 3 | 1 | |
| 155 | Melissa Peacock | Marshall Islands | 32.12 | 3 | 9 | |
| 156 | Rida Mitha | Pakistan | 32.28 | 3 | 6 | |
| 157 | Rayleen David | Federated States of Micronesia | 32.96 | 2 | 1 | |
| 158 | Jennet Saryyeva | Turkmenistan | 33.02 | 2 | 8 | |
| 159 | Shreya Dhital | Nepal | 33.37 | 2 | 3 | |
| 160 | Antja Flowers | Palau | 33.74 | 2 | 4 | |
| 161 | Shaila Rana | Nepal | 33.83 | 2 | 2 | |
| 162 | Elisabeth Nikiema | Burkina Faso | 34.07 | 1 | 2 | |
| 163 | Irankunda Lena Courageuse | Burundi | 34.30 | 2 | 9 | |
| 164 | Angele Gbenou Mahutin | Benin | 35.04 | 1 | 1 | |
| 165 | Elsie Uwamahoro | Burundi | 36.56 | 2 | 0 | |
| 166 | Awa Keita | Mali | 37.07 | 1 | 6 | |
| 167 | Aicha Oumar Coulibaly | Mali | 37.47 | 1 | 3 | |
| 168 | Svetlana Dogadkina | Tajikistan | 39.04 | 3 | 0 | |
| 169 | Ishita Hitendra Tanna | Tanzania | 43.53 | 1 | 7 | |
| – | Mukanya Ntumba Clarisse | Democratic Republic of the Congo | DNS | 1 | 5 | |
| – | Djene Barry | Guinea | DNS | 3 | 7 | |
| – | Maroua Mathlouthi | Tunisia | DNS | 10 | 8 | |
| – | Li Zhesi | China | DNS | 18 | 2 | |
| – | Yanet Gebremedhin | Ethiopia | DSQ | 1 | 4 | |
| – | Stephanie Rasoamanana | Madagascar | DSQ | 5 | 4 | |
| – | Cherelle Thompson | Trinidad and Tobago | DSQ | 12 | 6 | |

### Semifinals

| Rank | Name | Nationality | Time | Heat | Lane | Notes |
| 1 | Cate Campbell | Australia | 24.08 | 2 | 4 | CR |
| 2 | Marleen Veldhuis | Netherlands | 24.20 | 1 | 5 | |
| 3 | Britta Steffen | Germany | 24.28 | 2 | 3 | |
| 4 | Amanda Weir | United States | 24.31 | 2 | 5 | |
| 5 | Therese Alshammar | Sweden | 24.32 | 1 | 4 | |
| 6 | Libby Trickett | Australia | 24.34 | 2 | 2 | |
| 7 | Francesca Halsall | Great Britain | 24.42 | 1 | 3 | NR |
| 8 | Dara Torres | United States | 24.43 | 2 | 6 | |
| 9 | Malia Metella | France | 24.58 | 1 | 7 | NR |
| 10 | Jeanette Ottesen | Denmark | 24.62 | 1 | 6 | NR |
| 11 | Sviatlana Khakhlova | Belarus | 24.69 | 1 | 8 | |
| 12 | Aleksandra Gerasimenya | Belarus | 24.69 | 2 | 7 | |
| 13 | Victoria Poon | Canada | 24.75 | 1 | 1 | NR |
| 14 | Arlene Semeco | Venezuela | 24.76 | 2 | 1 | SA |
| 15 | Hinkelien Schreuder | Netherlands | 24.85 | 1 | 2 | |
| 16 | Hanna-Maria Seppälä | Finland | 25.09 | 2 | 8 | |

### Final

| Rank | Name | Nationality | Time | Lane | Notes |
| | Britta Steffen | Germany | 23.73 | 3 | WR |
| | Therese Alshammar | Sweden | 23.88 | 2 | NR |
| | Cate Campbell | Australia | 23.99 | 4 | |
| | Marleen Veldhuis | Netherlands | 23.99 | 5 | |
| 5 | Francesca Halsall | Great Britain | 24.11 | 1 | NR |
| 6 | Libby Trickett | Australia | 24.19 | 7 | |
| 7 | Amanda Weir | United States | 24.23 | 6 | |
| 8 | Dara Torres | United States | 24.48 | 8 | |