1977 Marlboro South Australian Men's Tennis Classic

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.

Singles
🇺🇸 Victor Amaya defeated 🇺🇸 Brian Teacher 6–1, 6–4
 * It was Amaya's first singles title of the year and of his career.

Doubles
🇦🇺 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.