1977 Australian Open (January)

The 1977 Australian Open (January) was a tennis tournament played on outdoor grass courts at the Kooyong Lawn Tennis Club in Melbourne, Australia. The tournament was held from 3 to 9 January 1977. Due to a scheduling change, two Australian Opens took place in 1977 with the second taking place in December.

Seniors

Men's singles

United States Roscoe Tanner defeated Argentina Guillermo Vilas, 6–3, 6–3, 6–3

• It was Tanner's 1st (and only) career Grand Slam title.

Women's singles

Australia Kerry Melville Reid defeated Australia Dianne Fromholtz, 7–5, 6–2

• It was Melville's 1st (and only) career Grand Slam title.

Men's doubles

United States Arthur Ashe / Australia Tony Roche defeated United States Charlie Pasarell / United States Erik van Dillen, 6–4, 6–4

Women's doubles

Australia Dianne Fromholtz / Australia Helen Gourlay defeated Australia Kerry Melville Reid / United States Betsy Nagelsen, 5–7, 6–1, 7–5

Mixed doubles

Competition not held between 1970 and 1986.

Juniors

Boys' singles

Australia Brad Drewett defeated United States Tim Wilkison, 6–4, 7–6

Girls' singles

Australia Pamela Baily defeated Australia Amanda Tobin, 6–2, 6–3