The 1980 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 event, also known by its sponsored name Nabisco NSW Open, was part of the 1980 Volvo Grand Prix circuitand was held from 15 December through 21 December 1980. The women's event, also known by its sponsored name NSW Building Society Classic, was part of the 1980 Colgate Series and was held from 1 December through 7 December 1980. It was the 88th edition of the event. The singles titles were won by unseeded Fritz Buehning and third-seeded Wendy Turnbull.