| 1990 Australian Men's Hardcourt Championships | |
|---|---|
| Date | 1–7 January |
| Edition | 46th |
| Category | World Series |
| Draw | 32S / 16D |
| Prize money | $125,000 |
| Surface | Hard / outdoor |
| Location | Adelaide, Australia |
| Venue | Memorial Drive Park |
| Champions | |
| Singles | |
 Thomas Muster[1] | |
| Doubles | |
 Andrew Castle /  Nduka Odizor[2] | |
The 1990 Australian Men's Hardcourt Championships was a tennis tournament played on outdoor hard courts at the Memorial Drive Park in Adelaide, Australia and was part of the World Series Free Week of the 1990 ATP Tour. It was the 46th edition of the tournament and was held from 1 January through 7 January 1990. Third-seeded Thomas Muster won the singles title.
- ^ "1990 Adelaide – Singles draw". Association of Tennis Professionals (ATP).
- ^ "1990 Adelaide – Doubles draw". Association of Tennis Professionals (ATP).