The 1985 Australian Open was a tennis tournament played on grass courts at the Kooyong Lawn Tennis Club in Melbourne in Victoria in Australia. It was the 74th edition of the Australian Open and was held from 25 November through 8 December 1985; the last to be held at this time of year.
With the decision to hold the tournament in January in future, the next Australian Open would be the 1987 Open, held just over a year later.
See main article: 1985 Australian Open – Men's singles. 
Stefan Edberg defeated Mats Wilander, 6–4, 6–3, 6–3
• It was Edberg's 1st career Grand Slam singles title.
See main article: 1985 Australian Open – Women's singles. 
Martina Navratilova defeated Chris Evert, 6–2, 4–6, 6–2
• It was Navratilova's 13th career Grand Slam singles title and her 3rd and last title at the Australian Open.
See main article: 1985 Australian Open – Men's doubles. Paul Annacone / Christo van Rensburg defeated 
Mark Edmondson / Kim Warwick, 3–6, 7–6, 6–4, 6–4
• It was Annacone's 1st and only career Grand Slam doubles title.
• It was van Rensburg's 1st and only career Grand Slam doubles title.
See main article: 1985 Australian Open – Women's doubles. Martina Navratilova / Pam Shriver defeated Claudia Kohde-Kilsch / Helena Suková 6–3, 6–4
The competition was not held between 1970 and 1985.
Shane Barr defeated Steve Furlong 7–6, 6–7, 6–3
Jenny Byrne defeated Louise Field 6–1, 6–3
Brett Custer / David Macpherson defeated Petr Korda / Cyril Suk 7–5, 6–2
Jenny Byrne / Janine Thompson defeated Sally McCann / Alison Scott 6–0, 6–3