Swimming at the 2003 World Aquatics Championships – Women's 100 metre freestyle
# Swimming at the 2003 World Aquatics Championships – Women's 100 metre freestyle

The Women's 100m Freestyle event at the 10th FINA World Aquatics Championships swam on 24–25 July 2003 in Barcelona, Spain. Preliminary and semifinal heats were swum on July 24; the Final swam in the evening session on July 25.

Prior to the event, the World (WR) and Championship (CR) records were:

* WR: 53.77 swum by Inge de Bruijn (Netherlands) on September 20, 2000, in Sydney, Australia
* CR: 54.01 swum by Jingyi Le (China) on September 5, 1994, in Rome, Italy

## Results

### Final

| Place | Swimmer | Nation | Time |
| - | - | - | - |
| 1 | Hanna-Maria Seppälä | Finland | 54.37 |
| 2 | Jodie Henry | Australia | 54.58 |
| 3 | Jenny Thompson | USA | 54.65 |
| 4 | Alena Popchanka | Belarus | 54.79 |
| 5 | Libby Lenton | Australia | 54.82 |
| 6 | Martina Moravcová | Slovakia | 54.86 |
| 7 | Antje Buschschulte | Germany | 54.91 |
| 8 | Marleen Veldhuis | Netherlands | 55.17 |

### Semifinals

| Rank | Heat + Lane | Swimmer | Nation | Time | Notes |
| - | - | - | - | - | - |
| 1 | S2 L4 | Hanna-Maria Seppälä | Finland | 54.48 | q |
| 2 | S2 L3 | Jodie Henry | Australia | 54.78 | q |
| 3 | S1 L4 | Jenny Thompson | USA | 54.81 | q |
| 4 | S1 L3 | Libby Lenton | Australia | 54.92 | q |
| 5 | S1 L5 | Martina Moravcová | Slovakia | 55.00 | q |
| 6 | S2 L5 | Marleen Veldhuis | Netherlands | 55.04 | q |
| 7 | S1 L6 | Alena Popchanka | Belarus | 55.13 | q |
| 8 | S1 L2 | Antje Buschschulte | Germany | 55.20 | q |
| 9 | S2 L6 | Chantal Groot | Netherlands | 55.23 | |
| 10 | S1 L7 | Tomoko Nagai | Japan | 55.63 | |
| 11 | S2 L2 | Petra Dallmann | Germany | 55.80 | |
| 12 | S2 L7 | Solenne Figuès | France | 56.04 | |
| 13 | S2 L1 | Nery-Mantey Niangkouara | Greece | 56.10 | |
| 14 | S2 L8 | Paulina Barzycka | Poland | 56.17 | |
| 15 | S1 L1 | Johanna Sjöberg | Sweden | 56.48 | |
| 16 | S1 L8 | Elina Partõka | Estonia | 56.50 | |

### Preliminaries

| Rank | Heat+Lane | Swimmer | Nation | Time | Notes |
| - | - | - | - | - | - |
| 1 | H11 L4 | Hanna-Maria Seppälä | Finland | 54.82 | q |
| 2 | H12 L3 | Jenny Thompson | United States | 54.83 | q |
| 3 | H11 L2 | Marleen Veldhuis | Netherlands | 55.15 | q |
| 4 | H11 L3 | Martina Moravcová | Slovakia | 55.19 | q |
| 5 | H10 L4 | Jodie Henry | Australia | 55.37 | q |
| 6 | H10 L5 | Libby Lenton | Australia | 55.44 | q |
| 7 | H11 L6 | Yu Yang | China | 55.72 | q, scratched |
| 8 | H10 L7 | Chantal Groot | Netherlands | 55.78 | q |
| 9 | H12 L5 | Alena Popchanka | Belarus | 55.82 | q |
| 10 | H11 L5 | Petra Dallmann | Germany | 55.86 | q |
| 11 | H12 L6 | Antje Buschschulte | Germany | 55.95 | q |
| 12 | H10 L3 | Xu Yanwei | China | 55.98 | q, scratched |
| 13 | H12 L1 | Solenne Figuès | France | 56.02 | q |
| 14 | H09 L4 | Tomoko Nagai | Japan | 56.16 | q |
| 15 | H10 L6 | Alison Sheppard | Great Britain | 56.17 | q, scratched |
| 16 | H12 L7 | Johanna Sjöberg | Sweden | 56.20 | q |
| 17 | H10 L8 | Paulina Barzycka | Poland | 56.39 | |
| 18 | H08 L4 | Elina Partõka | Estonia | 56.43 | |
| 19 | H09 L3 | Yoon Ji Ryu | South Korea | 56.46 | |
| 20 | H09 L8 | Nery-Mantey Niangkouara | Greece | 56.50 | |
| 20 | H10 L2 | Hanna Scherba | Belarus | 56.50 | |
| 22 | H10 L1 | Kathryn Evans | Great Britain | 56.53 | |
| 23 | H09 L7 | Laura Nicholls | Canada | 56.57 | |
| 24 | H09 L5 | Flávia Delaroli | Brazil | 56.61 | |
| 25 | H09 L2 | Jana Myskova | Czech Republic | 56.63 | |
| 25 | H11 L7 | Olga Mukomol | Ukraine | 56.63 | |
| 27 | H09 L1 | Eleni Kosti | Greece | 56.68 | |
| 27 | H12 L2 | Therese Alshammar | Sweden | 56.68 | |
| 29 | H08 L1 | Florencia Szigeti | Argentina | 56.79 | |
| 30 | H12 L8 | Lauren Roets | South Africa | 56.94 | |
| 31 | H12 L4 | Natalie Coughlin | United States | 56.98 | |
| 32 | H08 L8 | Nataliya Khudyakova | Ukraine | 57.08 | |
| 33 | H01 L1 | So Eun Sun | South Korea | 57.25 | |
| 34 | H08 L2 | Dominique Diezi | Switzerland | 57.30 | |
| 35 | H08 L5 | Jana Kolukanova | Estonia | 57.45 | |
| 36 | H09 L6 | Marina Tchepourkova | Russia | 57.67 | |
| 37 | H08 L3 | Rebeca Gusmão | Brazil | 57.88 | |
| 38 | H07 L2 | Kolbrún Ýr Kristjánsdóttir | Iceland | 57.94 | |
| 39 | H07 L3 | Julie Hjorth-Hansen | Denmark | 58.12 | |
| 40 | H07 L6 | Marjorie Sagne | Switzerland | 58.17 | |
| 41 | H07 L4 | Lara Heinz | Luxembourg | 58.23 | |
| 42 | H07 L5 | Julie Douglas | Ireland | 58.53 | |
| 43 | H07 L1 | Agnese Ozoliņa | Latvia | 58.57 | |
| 44 | H06 L5 | Jennifer Ng | Hong Kong | 58.71 | |
| 45 | H07 L7 | Shikha Tandon | India | 58.82 | |
| 46 | H06 L6 | Diana Lopez | Venezuela | 58.99 | |
| 47 | H05 L7 | Lára Hrund Bjargardóttir | Iceland | 59.07 | |
| 48 | H05 L5 | Anna-Liza Mopio | Papua New Guinea | 59.16 | |
| 49 | H05 L3 | Sharntelle McLean | Trinidad and Tobago | 59.28 | |
| 50 | H06 L2 | Ximena Vilar | Venezuela | 59.64 | |
| 51 | H06 L1 | Yamilé Bahamonde | Ecuador | 59.69 | |
| 51 | H06 L8 | Yelena Skalinskaya | Kazakhstan | 59.69 | |
| 53 | H05 L4 | Maria Tregubova | Moldova | 59.96 | |
| 54 | H04 L3 | Kiera Aitken | Bermuda | 1:00.16 | |
| 55 | H06 L7 | Marianella Marin | Costa Rica | 1:00.45 | |
| 56 | H06 L3 | Irina Shlemova | Uzbekistan | 1:00.67 | |
| 57 | H04 L4 | Khadija Ciss | Senegal | 1:00.82 | |
| 58 | H05 L2 | Larissa Komt | Peru | 1:00.96 | |
| 59 | H05 L6 | Lizza Danila | Philippines | 1:01.07 | |
| 60 | H06 L4 | Chonlatorn Vorathamrong | Thailand | 1:01.23 | |
| 61 | H05 L1 | Carolina Cerqueda | Andorra | 1:01.55 | |
| 62 | H04 L2 | Geraldine Arce | Nicaragua | 1:02.29 | |
| 63 | H04 L7 | Ambica Iyengar | India | 1:02.32 | |
| 64 | H01 L3 | Nicole Hayes | Palau | 1:02.38 | |
| 65 | H03 L2 | Shrone Austin | Seychelles | 1:02.67 | |
| 66 | H04 L5 | Magdalena Sutanto | Indonesia | 1:03.07 | |
| 67 | H04 L6 | Roshendra Vrolijk | Aruba | 1:03.28 | |
| 68 | H04 L1 | Roberta Callus | Malta | 1:03.30 | |
| 69 | H03 L5 | Jakie Wellman | Zambia | 1:03.47 | |
| 69 | H03 L3 | Man Wai Fong | Macau | 1:03.47 | |
| 71 | H04 L8 | Simona Muccioli | San Marino | 1:04.11 | |
| 72 | H03 L4 | Sade Daal | Suriname | 1:04.70 | |
| 73 | H03 L7 | Eva Donde | Kenya | 1:05.65 | |
| 74 | H02 L5 | Binta Zahra Diop | Senegal | 1:06.75 | |
| 75 | H02 L4 | Genevieve Meledje Lasm Quissoh | Ivory Coast | 1:07.37 | |
| 76 | H02 L6 | Emerlinda Zefanias Zamba | Mozambique | 1:08.25 | |
| 77 | H03 L6 | Tojohanitra Andriamanjatoarimanana | Madagascar | 1:08.30 | |
| 78 | H01 L7 | Asanti Mickle | Guyana | 1:08.61 | |
| 79 | H01 L4 | Samera Bitar | Bahrain | 1:08.75 | |
| 80 | H02 L8 | Monika Bakale | Republic of the Congo | 1:08.98 | |
| 81 | H03 L1 | Ghazal El Jobeili | Lebanon | 1:09.86 | |
| 82 | H02 L2 | Rovena Marku | Albania | 1:10.08 | |
| 83 | H02 L7 | Joana Gjini | Albania | 1:11.18 | |
| 84 | H01 L6 | Aminath Rouya Hussain | Maldives | 1:11.58 | |
| 85 | H02 L3 | Rubab Raza | Pakistan | 1:12.16 | |
| 86 | H01 L5 | Mariyam Nafha Ali | Maldives | 1:15.76 | |
| - | H03 L8 | Éliane Droubry | Ivory Coast | DQ | |
| - | - | Federica Pellegrini | Italy | DNS | |
| - | - | Alison Fitch | New Zealand | DNS | |
| - | - | Marianne Limpert | Canada | DNS | |
| - | - | Joscelin Yeo | Singapore | DNS | |
| - | - | Maj Hillesund | Norway | DNS | |
| - | - | Ayeisha Collymore | Trinidad and Tobago | DNS | |
| - | - | Elize Taua | Samoa | DNS | |
| - | - | Larissa Inangorore | Burundi | DNS | |
