1980 Custom Credit Australian Indoor Championships – Singles

Vitas Gerulaitis was the defending champion but lost in the final 6–3, 6–4 to John McEnroe.

Seeds

 * 1) 🇺🇸 John McEnroe (champion)
 * 2) 🇺🇸 Gene Mayer (semifinals)
 * 3) 🇺🇸 Vitas Gerulaitis (final)
 * 4) 🇵🇱 Wojciech Fibak (first round)
 * 5) 🇺🇸 John Sadri (quarterfinals)
 * 6)  Johan Kriek (semifinals)
 * 7) 🇺🇸 Bill Scanlon (quarterfinals)
 * 8) 🇦🇺 Phil Dent (second round)