The 1976 New South Wales Open, also known by its sponsored name Marlboro New South Wales Open, was a combined men's and women's tennis tournament played on outdoor grass courts at the White City Stadium in Sydney, Australia.

The men's was part of the 1977 Colgate-Palmolive Grand Prix circuit.

It was the 84th edition of the event and was held from 26 December 1976 through 1 January 1977.

The singles titles were won by Kerry Reid and 33-year-old Tony Roche.

[4][5][2] Tony Roche defeated Dick Stockton 6–3, 3–6, 6–3, 6–4 Kerry Reid defeated Dianne Fromholtz 3–6, 6–3, 6–2 Syd Ball / Kim Warwick defeated Mark Edmondson / John Marks 6–3, 6–4 Helen Gourlay Cawley / Betsy Nagelsen defeated Dianne Fromholtz / Renáta Tomanová 6–4, 6–1