| 1990 Australian Open | |
|---|---|
| Date | 15–28 January 1990 |
| Edition | 78th |
| Category | Grand Slam (ITF) |
| Surface | Hardcourt (Rebound Ace) |
| Location | Melbourne, Australia |
| Venue | National Tennis Centre at Flinders Park |
| Champions | |
| Men's singles | |
 Ivan Lendl | |
| Women's singles | |
 Steffi Graf | |
| Men's doubles | |
 Pieter Aldrich / Danie Visser | |
| Women's doubles | |
| Jana Novotná / Helena Suková | |
| Mixed doubles | |
 Natasha Zvereva /  Jim Pugh | |
| Boys' singles | |
| Dirk Dier | |
| Girls' singles | |
 Magdalena Maleeva | |
| Boys' doubles | |
 Roger Pettersson / Mårten Renström | |
| Girls' doubles | |
 Rona Mayer / Limor Zaltz | |
The 1990 Australian Open was a tennis tournament played on outdoor hard courts at Flinders Park in Melbourne in Victoria in Australia. It was the 78th edition of the Australian Open and was held from 15 through 28 January 1990.