| 2005 Australian Open | |
|---|---|
| Date | 17–30 January 2005 |
| Edition | 93rd |
| Category | Grand Slam (ITF) |
| Surface | Hardcourt (Rebound Ace) |
| Location | Melbourne, Australia |
| Venue | Melbourne Park |
| Champions | |
| Men's singles | |
 Marat Safin | |
| Women's singles | |
 Serena Williams | |
| Men's doubles | |
 Wayne Black / Kevin Ullyett | |
| Women's doubles | |
Svetlana Kuznetsova /  Alicia Molik | |
| Mixed doubles | |
| Samantha Stosur / Scott Draper | |
| Wheelchair men's singles | |
| David Hall | |
| Wheelchair women's singles | |
 Mie Yaosa | |
| Wheelchair men's doubles | |
 Robin Ammerlaan /  Martin Legner | |
| Wheelchair women's doubles | |
Maaike Smit /  Florence Gravellier | |
| Boys' singles | |
| Donald Young | |
| Girls' singles | |
 Victoria Azarenka | |
| Boys' doubles | |
 Kim Sun-yong /  Yi Chu-huan | |
| Girls' doubles | |
Victoria Azarenka /  Marina Erakovic | |
| Men's legends doubles | |
Richard Fromberg /  Mats Wilander | |
| Legends mixed doubles | |
| Nicole Bradtke / Roy Emerson | |
The 2005 Australian Open was a Grand Slam tennis tournament held in Melbourne, Australia from 17 until 30 January 2005. Roger Federer was unsuccessful in defending his 2004 title, being defeated in the semi-finals by eventual champion Marat Safin in a rematch of the 2004 final. Safin defeated third-seed Lleyton Hewitt in the final in four sets. Justine Henin-Hardenne could not defend her 2004 title due to an injury suffered in the second half of 2004. Serena Williams, the champion in 2003, defeated Lindsay Davenport in the women's final.