The 1977 Marlboro South Australian Men's Tennis Classic was a men's tennis tournament held in Adelaide, Australia. The event was part of the 1977 Grand Prix circuit and categorized as a two–star event. The tournament was held from 10 January through 16 January 1977. The singles title and $13,500 prize money was won by Victor Amaya.  
Victor Amaya defeated Brian Teacher 6–1, 6–4
- It was Amaya's only title of the year and the 1st of his career.
Cliff Letcher / Dick Stockton defeated Syd Ball / Kim Warwick 6–3, 4–6, 6–4
- It was Letcher's only title of the year and the 1st of his career. It was Stockton's 1st title of the year and the 13th of his career.