# Swimming at the 2005 World Aquatics Championships – Women's 4 × 100 metre medley relay

The Women's 4x100 Medley Relay event at the 11th FINA World Aquatics Championships swam on 30 July 2005 in Montreal, Canada.
At the start of the event, the existing World (WR) and Championships (CR) records were:
* WR: 3:57.32 swum by Australia on 21 August 2004 in Athens, Greece
* CR: 3:59.89 swum by China on 26 July 2003 in Barcelona, Spain

## Results
### Final

| Place | Nation | Swimmers | Time | Notes |
| 1 | Australia | Sophie Edington (1:01.48), Leisel Jones (1:05.73), Jessicah Schipper (57.13), Libby Lenton (53.13) | 3:57.47 | CR |
| 2 | USA | Natalie Coughlin (1:00.00), Jessica Hardy (1:07.70), Rachel Komisarz (57.80), Amanda Weir (54.42) | 3:59.92 | |
| 3 | Germany | Antje Buschschulte (1:00.72), Sarah Poewe (1:08.51), Annika Mehlhorn (58.75), Daniela Götz (54.53) | 4:02.51 | |
| 4 | China | Chen Yanyan (1:02.18), Xuejuan Luo (1:08.17), Yafei Zhou (58.53), Yingwen Zhu (53.92) | 4:02.80 | |
| 5 | Italy | Alessia Filippi (1:02.34), Chiara Boggiatto (1:08.45), Ambra Migliori (59.45), Federica Pellegrini (54.66) | 4:04.90 | |
| 6 | Poland | Katarzyna Staszak (1:03.17), Beata Kaminska (1:08.38), Otylia Jędrzejczak (58.39), Paulina Barzycka (55.14) | 4:05.08 | |
| 7 | Japan | Reiko Nakamura (1:01.62), Sayaka Nakamura (1:09.81), Yuko Nakanishi (59.55), Norie Urabe (55.87) | 4:06.85 | |
| -- | Russia | Stanislava Komarova (1:02.27), Ekaterina Kormatcheva (1:08.73), Natalia Sutiagina (DQ), Daria Beliakina | DQ | |

### Preliminaries

| Rank | Heat+Lane | Nation | Swimmers | Time | Notes |
| 1 | H3 L4 | Australia | Giaan Rooney (1:02.26), Brooke Hanson (1:07.94), Felicity Galvez (59.39), Jodie Henry (54.03) | 4:03.62 | q |
| 2 | H2 L4 | United States | Jeri Moss (1:02.54), Tara Kirk (1:07.90), Mary DeScenza (58.63), Lacey Nymeyer (55.36) | 4:04.43 | q |
| 3 | H1 L4 | Germany | Antje Buschschulte (1:01.95), Sarah Poewe (1:09.09), Annika Mehlhorn (59.04), Daniela Götz (55.42) | 4:05.50 | q |
| 4 | H3 L2 | Italy | Alessia Filippi (1:03.02), Chiara Boggiatto (1:08.14), Ambra Migliori (59.80), Federica Pellegrini (54.67) | 4:05.63 | q |
| 5 | H1 L6 | Russia | Stanislava Komarova (1:02.26), Ekaterina Kormatcheva (1:08.99), Natalia Sutiagina (59.46), Daria Beliakina (55.66) | 4:06.37 | q |
| 6 | H3 L5 | China | Jing Zhao (1:02.90), Xuejuan Luo (1:10.26), Yafei Zhou (59.30), Yingwen Zhu (54.23) | 4:06.69 | q |
| 7 | H3 L8 | Poland | Katarzyna Staszak (1:04.08), Katarzyna Dulian (1:08.75), Otylia Jędrzejczak (58.55), Paulina Barzycka (55.33) | 4:06.74 | q |
| 8 | H2 5L | Japan | Mai Nakamura (1:02.53), Sayaka Nakamura (1:09.89), Yuko Nakanishi (59.68), Norie Urabe (55.22) | 4:07.32 | q |
| 9 | H2 L3 | Netherlands | Hinkelien Schreuder (1:03.76), Madelon Baans (1:09.59), Inge Dekker (58.69), Chantal Groot (55.35) | 4:07.39 | |
| 10 | H1 L5 | Great Britain | Katy Sexton (1:02.45), Kate Haywood (1:08.68), Rosalind Brett (1:01.16), Melanie Marshall (55.42) | 4:07.71 | |
| 11 | H3 L6 | New Zealand | Hannah McLean (1:01.53), Annabelle Carey (1:10.73), Elizabeth Coster (1:00.36), Alison Fitch (55.39) | 4:08.01 | |
| 12 | H2 L6 | Canada | Erin Gammel (1:02.77), Christin Petelski (1:10.07), Audrey Lacroix (1:00.51), Sophie Simard (55.40) | 4:08.75 | |
| 13 | H3 L7 | Sweden | Therese Svendsen (1:04.22), Josefin Wede (1:09.85), Gabriella Fagundez (1:00.23), Josefin Lillhage (55.13) | 4:09.43 | |
| 14 | H3 L3 | Spain | Duane Rocha (1:03.53), Sara Pérez (1:10.78), Mireia García (1:00.78), Tatiana Rouba (56.03) | 4:11.12 | |
| 15 | H1 L3 | Denmark | Louise Ørnstedt (1:02.03), Julie Hjorth-Hansen (1:11.61), Jeanette Ottesen (1:00.65), Annette Hansen (57.25) | 4:11.54 | |
| 16 | H2 L2 | South Africa | Melissa Corfe (1:04.73), Suzaan van Biljon (1:09.35), Mandy Loots (1:00.03), Chanelle Van Wyk (58.10) | 4:12.21 | |
| 17 | H L | South Korea | Yoo Jin Jung (1:04.51), Seul-Ki Jung (1:11.70), You-Ri Kwon (1:02.56), Keo Ra Lee (57.07) | 4:15.84 | |
| 18 | H L | Czech Republic | Petra Klosová (1:04.49), Petra Chocová (1:11.33), Lenka Jarosova (1:04.53), Jana Myšková (56.85) | 4:17.20 | |
| 19 | H L | Chinese Taipei | Man-Hsu Lin (1:06.46), Yu-Chia Tong (1:13.63), Chin-Kuei Yang (1:03.67), Pin-Chieh Nieh (58.22) | 4:21.98 | |
| 20 | H L | Singapore | Lynette Ng (1:07.85), Nicolette Teo (1:14.53), Bernadette Lee (1:03.85), Joscelin Yeo (57.41) | 4:23.64 | |
| 21 | H1 L1 | Macau | Man Wai Fong (1:12.38), Sin Ian Lei (1:20.98), Cheok Mei Ma (1:07.74), Weng I Kuan (1:02.62) | 4:43.72 | |
| -- | -- | Slovenia | | DNS | |