# Swimming at the 2005 World Aquatics Championships – Women's 100 metre breaststroke

The Women's 100 Breaststroke event at the 11th FINA World Aquatics Championships swam 25+26 July 2005 in Montreal, Canada. Preliminary and semifinal heats were swum on 25 July, with the prelims in the morning session and the semis in the evening. The final went the next evening.
At the start of the event, the existing world (WR) and championship (CR) records were:
* WR: 1:06.37, Leisel Jones (Australia) swum 21 July 2003 in Barcelona, Spain
* CR: 1:06.37, Leisel Jones (Australia) swum 21 July 2003 in Barcelona, Spain

## Results
### Prelims

| Rank | Heat + lane | Swimmer | Nation | Time | Notes |
| 1 | H6 L4 | Leisel Jones | Australia | 1:07.26 | q |
| 2 | H6 L5 | Jessica Hardy | United States | 1:07.34 | q |
| 3 | H5 L4 | Tara Kirk | United States | 1:07.80 | q |
| 4 | H7 L6 | Sarah Poewe | Germany | 1:08.64 | q |
| 5 | H6 L3 | Beata Kaminska | Poland | 1:08.69 | q |
| 6 | H7 L7 | Suzaan van Biljon | South Africa | 1:08.70 | q |
| 7 | H5 L5 | Kate Haywood | Great Britain | 1:08.76 | q |
| 7 | H6 L6 | Chiara Boggiatto | Italy | 1:08.76 | q |
| 9 | H7 L2 | Ekaterina Kormatcheva | Russia | 1:08.81 | q |
| 10 | H6 L2 | Katarzyna Dulian | Poland | 1:08.89 | q |
| 11 | H7 L5 | Brooke Hanson | Australia | 1:09.34 | q |
| 12 | H5 L2 | Mirna Jukić | Austria | 1:09.80 | q |
| 12 | H5 L8 | Eeva Saarinen | Finland | 1:09.80 | q |
| 14 | H7 L4 | LUO Xuejuan | China | 1:09.83 | q |
| 15 | H5 L6 | Elena Bogomazova | Russia | 1:09.84 | q |
| 16 | H5 L3 | Sayaka Nakmura | Japan | 1:09.93 | q |
| 17 | H5 L7 | Christin Petelski | Canada | 1:09.94 | |
| 18 | H6 L1 | Nanka Tamura | Japan | 1:09.96 | |
| 19 | H4 L5 | Josefin Wede | Sweden | 1:10.12 | |
| 20 | H5 L1 | Madelon Baans | Netherlands | 1:10.13 | |
| 21 | H7 L3 | Kirsty Balfour | Great Britain | 1:10.32 | |
| 22 | H7 L1 | Diana Gomes | Portugal | 1:10.56 | |
| 23 | H4 L7 | Seul-Ki Jung | South Korea | 1:10.71 | |
| 24 | H4 L2 | Su Yeon Back | South Korea | 1:10.72 | |
| 25 | H4 L4 | Kathleen Stoody | Canada | 1:11.01 | |
| 26 | H4 L8 | Annabelle Carey | New Zealand | 1:11.05 | |
| 27 | H6 L7 | Angeliki Exarchou | Greece | 1:11.56 | |
| 28 | H4 L3 | Marina Kuč | Serbia and Montenegro | 1:11.78 | |
| 29 | H4 L1 | Rebecca Ejdervik | Sweden | 1:11.85 | |
| 30 | H6 L8 | Chenfei Ma | China | 1:11.87 | |
| 31 | 4H L6 | Kelly Bentley | New Zealand | 1:12.28 | |
| 32 | H7 L8 | Ina Kapishina | Belarus | 1:12.35 | |
| 33 | H3 L4 | Yi Ting Siow | Malaysia | 1:12.44 | |
| 34 | H3 L3 | Joscelin Yeo | Singapore | 1:12.74 | |
| 35 | H2 L5 | Louise Jansen | Denmark | 1:12.80 | |
| 36 | H3 L7 | Alia Atkinson | Jamaica | 1:13.21 | |
| 37 | H3 L5 | Tamara Sambrailo | Slovenia | 1:13.49 | |
| 38 | H3 L8 | Nicolette Teo | Singapore | 1:13.65 | |
| 39 | H3 L2 | Yu-Chia Tong | Chinese Taipei | 1:14.08 | |
| 40 | H2 L4 | Valeria Silva | Peru | 1:15.38 | |
| 41 | H2 L6 | Dannielle Van Zijl | Namibia | 1:15.93 | |
| 42 | H3 L1 | Ting-Wei Lin | Chinese Taipei | 1:15.98 | |
| 43 | H2 L1 | Alexis Jordan | Barbados | 1:18.09 | |
| 44 | H2 L2 | Sin Ian Lei | Macau | 1:19.58 | |
| 45 | H2 L8 | Mayumi Raheem | Sri Lanka | 1:21.06 | |
| 46 | H2 L7 | Nataliya Filina | Azerbaijan | 1:21.19 | |
| 47 | H1 L6 | Katerine Moreno | Bolivia | 1:21.43 | |
| 48 | H1 L4 | Samantha Fajardo | Ecuador | 1:22.59 | |
| 49 | H1 L3 | Blessing Forcados | Nigeria | 1:23.57 | |
| 50 | H1 L5 | Melissa Ashby | Grenada | 1:24.09 | |
| 51 | H2 L3 | Phan Thi Hanh | Vietnam | 1:24.64 | |
| 52 | H1 L2 | Sameera Al Bitar | Bahrain | 1:29.45 | |
| -- | -- | Smiljana Marinović | Croatia | DNS | |

### Semifinals

| Rank | Heat + lane | Swimmer | Nation | Time | Notes |
| 1 | S1 L4 | Jessica Hardy | USA | 1:06.20 | q, WR |
| 2 | S2 L4 | Leisel Jones | Australia | 1:06.93 | q |
| 3 | S2 L5 | Tara Kirk | USA | 1:07.20 | q |
| 4 | S1 L5 | Sarah Poewe | Germany | 1:07.80 | q |
| 5 | S1 L1 | LUO Xuejuan | China | 1:08.01 | q |
| 6 | S2 L7 | Brooke Hanson | Australia | 1:08.33 | q |
| 7 | S1 L6 | Chiara Boggiatto | Italy | 1:08.48 | q |
| 8 | S1 L3 | Suzaan van Biljon | South Africa | 1:08.50 | q |
| 9 | S2 L3 | Beata Kaminska | Poland | 1:08.54 | |
| 10 | S2 L6 | Kate Haywood | Great Britain | 1:08.65 | |
| 11 | S1 L7 | Mirna Jukić | Austria | 1:08.90 | |
| 12 | S1 L2 | Katarzyna Dulian | Poland | 1:08.99 | |
| 13 | S2 L2 | Ekaterina Kormatcheva | Russia | 1:09.17 | |
| 14 | S2 L1 | Eeva Saarinen | Finland | 1:09.83 | |
| 15 | S1 L8 | Sayaka Nakamura | Japan | 1:10.04 | |
| -- | S2 L8 | Elena Bogomazova | Russia | DQ | |

### Final

| Place | Swimmer | Nation | Time |
| 1 | Leisel Jones | Australia | 1:06.25 |
| 2 | Jessica Hardy | USA | 1:06.62 |
| 3 | Tara Kirk | USA | 1:07.43 |
| 4 | LUO Xuejuan | China | 1:07.60 |
| 5 | Brooke Hanson | Australia | 1:08.07 |
| 6 | Suzaan van Biljon | South Africa | 1:08.38 |
| 7 | Sarah Poewe | Germany | 1:08.47 |
| 8 | Chiara Boggiatto | Italy | 1:08.98 |