1977 Australian Open (January) – Men's singles
| Men's singles | |
|---|---|
| 1977 Australian Open (January) | |
| Champion | Roscoe Tanner |
| Runner-up | Guillermo Vilas |
| Score | 6–3, 6–3, 6–3 |
| Draw | 64 |
| Seeds | 4 |
Roscoe Tanner defeated Guillermo Vilas in the final, 6–3, 6–3, 6–3 to win the men's singles tennis title at the January 1977 Australian Open. It was his first and only major singles title. Tanner was making his tournament debut. This was the first Australian Open men's singles final since 1912 not to feature an Australian player.
Mark Edmondson was the defending champion, but lost in the quarterfinals to Ken Rosewall.