The 1977 Marlboro South Australian Men's Tennis Classic was a men's tennis tournament played on outdoor grass courts in Adelaide, Australia. The event was part of the 1977 Grand Prix circuit and categorized as a two–star event. It was the 77th edition of the tournament and was held from 10 January through 16 January 1977. The singles title and $13,500 prize money was won by Victor Amaya.[3][4]