The 1977 Australian Open (January) was a tennis tournament played on outdoor grass courts at the Kooyong Stadium in Melbourne, Australia. The tournament was held from 3 to 9 January 1977. Due to a scheduling change two Australian Open's took place in 1977 with the second taking place in December.
Roscoe Tanner defeated Guillermo Vilas, 6–3, 6–3, 6–3
- It was Tanner's 1st (and only) career Grand Slam title.
Kerry Melville Reid defeated Dianne Fromholtz Balestrat, 7–5, 6–2
- It was Melville's 1st (and only) career Grand Slam title.
Arthur Ashe / Tony Roche defeated Charlie Pasarell / Erik Van Dillen, 6–4, 6–4
Dianne Fromholtz Balestrat / Helen Gourlay Cawley defeated Kerry Melville Reid / Betsy Nagelsen, 5–7, 6–1, 7–5