# Swimming at the 2003 World Aquatics Championships – Women's 50 metre breaststroke

The Women's 50m Breaststroke event at the 10th FINA World Aquatics Championships swam on 26–27 July 2003 in Barcelona, Spain. Preliminary heats swam during the morning session on July 26, with the top-16 finishers advancing to Semifinals that evening. The top-8 finishers then advanced to swim again in the Final the next evening.
At the start of the event, the World (WR) and Championship (CR) records were:
* WR: 30.57 swum by Zoë Baker (Great Britain) on July 30, 2002 in Manchester, UK.
* CR: 30.84 swum by Xuejuan Luo (China) on July 27, 2001 in Fukuoka, Japan

## Results
### Final

| Place | Swimmer | Nation | Time |
| 1 | Xuejuan Luo | China | 30.67 |
| 2 | Brooke Hanson | Australia | 31.13 |
| 3 | Zoë Baker | Great Britain | 31.37 |
| 4 | Leisel Jones | Australia | 31.50 |
| 5 | Tara Kirk | USA | 31.87 |
| 6 | Kristy Kowal | USA | 31.96 |
| 7 | Sarah Poewe | Germany | 32.03 |
| 8 | Elena Bogomazova | Russia | 32.27 |

### Seminfinals

| Rank | Heat + Lane | Swimmer | Nation | Time | Notes |
| 1 | S2 L5 | Xuejuan Luo | China | 30.64 | q, CR |
| 2 | S1 L4 | Brooke Hanson | Australia | 31.11 | q |
| 3 | S2 L7 | Leisel Jones | Australia | 31.23 | q |
| 4 | S2 L4 | Zoë Baker | Great Britain | 31.29 | q |
| 5 | S2 L3 | Tara Kirk | USA | 31.40 | q |
| 6 | S1 L5 | Kristy Kowal | USA | 31.79 | q |
| 7 | S1 L3 | Sarah Poewe | Germany | 31.94 | q |
| 8 | S1 L6 | Elena Bogomazova | Russia | 31.99 | q |
| 9 | S1 L2 | Emma Igelström | Sweden | 32.02 | |
| 10 | S2 L2 | Masami Tanaka | Japan | 32.07 | |
| 11 | S2 L8 | Madelon Baans | Netherlands | 32.14 | |
| 12 | S1 L1 | Roberta Crescentini | Italy | 32.21 | |
| 13 | S2 L1 | Vipa Bernhardt | Germany | 32.42 | |
| 14 | S2 L6 | Rhiannon Leier | Canada | 32.44 | |
| 15 | S1 L7 | Mirna Jukić | Austria | 32.46 | |
| 16 | S1 L8 | Yuliya Pidslina | Ukraine | 32.57 | |

### Preliminaries

| Rank | Heat+Lane | Swimmer | Nation | Time | Notes |
| 1 | H7 L4 | Zoë Baker | Great Britain | 31.10 | q |
| 2 | H8 L5 | Brooke Hanson | Australia | 31.24 | q |
| 3 | H6 L5 | Xuejuan Luo | China | 31.49 | q |
| 4 | H7 L7 | Kristy Kowal | United States | 31.80 | q |
| 5 | H7 L6 | Tara Kirk | United States | 31.81 | q |
| 6 | H6 L6 | Sarah Poewe | Germany | 31.96 | q |
| 6 | H7 L5 | Rhiannon Leier | Canada | 31.96 | q |
| 8 | H8 L3 | Elena Bogomazova | Russia | 31.99 | q |
| 9 | H7 L2 | Masami Tanaka | Japan | 32.04 | q |
| 10 | H8 L4 | Emma Igelström | Sweden | 32.11 | q |
| 11 | H6 L4 | Leisel Jones | Australia | 32.18 | q |
| 12 | H6 L1 | Mirna Jukić | Austria | 32.21 | q |
| 13 | H6 L2 | Vipa Bernhardt | Germany | 32.30 | q |
| 14 | H8 L6 | Roberta Crescentini | Italy | 32.39 | q |
| 15 | H6 L7 | Madelon Baans | Netherlands | 32.46 | q |
| 16 | H6 L3 | Yuliya Pidslina | Ukraine | 32.54 | q |
| 17 | H7 L1 | Maria Östling | Sweden | 32.55 | |
| 18 | H7 L3 | Svitlana Bondarenko | Ukraine | 32.56 | |
| 19 | H8 L7 | Majken Thorup | Denmark | 32.68 | |
| 20 | H8 L8 | Ágnes Kovács | Hungary | 32.73 | |
| 21 | H8 L2 | Emma Robinson | Ireland | 32.93 | |
| 22 | H7 L8 | Natalia Hissamutdinova | Estonia | 32.94 | |
| 23 | H5 L7 | Carmela Schlegel | Switzerland | 33.00 | |
| 24 | H4 L5 | Ingrid Haiden | South Africa | 33.36 | |
| 25 | H5 L5 | Tamara Sambrailo | Slovenia | 33.37 | |
| 25 | H5 L6 | Lauren Van Oosten | Canada | 33.37 | |
| 27 | H5 L4 | Ziada Jardine | South Africa | 33.39 | |
| 28 | H5 L8 | Nan Luo | China | 33.40 | |
| 29 | H4 L3 | Javiera Salcedo | Argentina | 33.89 | |
| 30 | H5 L3 | Maj Hillesund | Norway | 33.90 | |
| 31 | H5 L1 | İlkay Dikmen | Turkey | 33.98 | |
| 31 | H8 L1 | Salma Zeinhom | Egypt | 33.98 | |
| 33 | H4 L7 | Ka Lei Liu | Hong Kong | 34.00 | |
| 34 | H4 L8 | Íris Edda Heimisdóttir | Iceland | 34.01 | |
| 35 | H4 L4 | Aikaterini Sarakatsani | Greece | 34.02 | |
| 36 | H4 L1 | Valeria Silva | Peru | 34.08 | |
| 37 | H4 L2 | Ka Yi Suen | Hong Kong | 34.19 | |
| 38 | H4 L6 | Patricia Comini-Ribeiro | Brazil | 34.73 | |
| 39 | H3 L4 | Varduhi Avetisyan | Armenia | 35.59 | |
| 40 | H3 L3 | Katerine Moreno | Bolivia | 35.60 | |
| 41 | H3 L6 | Sin Ian Lei | Macau | 36.45 | |
| 42 | H1 L1 | Natalya Filina | Azerbaijan | 36.58 | |
| 43 | H2 L6 | Roshendra Vrolijk | Aruba | 37.18 | |
| 44 | H3 L2 | Éliane Droubry | Ivory Coast | 37.20 | |
| 45 | H3 L7 | Samar Nassar | Jordan | 37.46 | |
| 46 | H3 L5 | Alessandra Cenni | San Marino | 37.96 | |
| 47 | H3 L8 | Melissa Ashby | Grenada | 38.14 | |
| 48 | H2 L4 | Sade Daal | Suriname | 38.37 | |
| 48 | H3 L1 | N. Ravojanahary | Madagascar | 38.37 | |
| 50 | H2 L7 | Doli Akhter | Bangladesh | 38.41 | |
| 51 | H2 L3 | Rovena Marku | Albania | 39.74 | |
| 52 | H1 L2 | Asanti Mickle | Guyana | 40.03 | |
| 53 | H2 L2 | Tojohanitra Andriamanjatoarimanana | Madagascar | 40.13 | |
| 54 | H2 L8 | Jakie Wellman | Zambia | 42.63 | |
| 55 | H1 L5 | Mariyam Nafha Ali | Maldives | 43.53 | |
| 56 | H1 L7 | Evelyn Otto | Palau | 44.92 | |
| 57 | H1 L4 | Vilayphone Vongphachanh | Laos | 44.50 | |
| 58 | H2 L5 | Ginette Botende | Republic of the Congo | 54.51 | |
| - | H6 L8 | Smiljana Marinović | Croatia | DQ | |
| - | - | Ramona Pedretti | Switzerland | DNS | |
| - | - | Nayana Shakya | Nepal | DNS | |
| - | - | Amudam Ngyeh Cantile | Cameroon | DNS | |
| - | - | Shuri Solange Cho | Cameroon | DNS | |