1981 Australian Open – Men's singles

Men's singles
1981 Australian Open
Champion Johan Kriek
Runner-up Steve Denton
Score6–2, 7–6(7–1), 6–7(1–7), 6–4
Draw64
Seeds16

Johan Kriek defeated Steve Denton in the final, 6–2, 7–6(7–1), 6–7(1–7), 6–4 to win the men's singles tennis title at the 1981 Australian Open. It was his first major title, becoming the first South African to win a singles major. Kriek was making his tournament debut.

Brian Teacher was the reigning champion, but did not compete this year.