Vitas Gerulaitis defeated John Lloyd in the final, 6–3, 7–6, 5–7, 3–6, 6–2 to win the men's singles tennis title at the December 1977 Australian Open.

[1] It was his first and only major singles title.

Gerulaitis was making his tournament debut.

Roscoe Tanner was the defending champion, but lost in the first round to Chris Lewis.

Vitas Gerulaitis is the champion; others show the round in which they were eliminated.