1977 Marlboro South Australian Men's Tennis Classic – Singles

The event was being held for the first time since 1974.

Victor Amaya won the title, defeating Brian Teacher 6–1, 6–4 in the final.

Seeds
• # 🇺🇸 Roscoe Tanner (second round)

• # 🇺🇸 Arthur Ashe (second round)

• # 🇦🇺 Ray Ruffels (first round)

• # 🇺🇸 Dick Stockton (quarterfinals)

• # 🇦🇺 Mark Edmondson (second round)

• # 🇦🇺 Ross Case (second round)

• # N/A

• # 🇦🇺 Phil Dent (second round)