1980–81 Australia Tri-Nation Series

The 1980–81 Australia Tri-Nation Series (more commonly known as the 1980–81 World Series) was a cricket tournament held in Australia from 23 November 1980 to 3 February 1981. It was the second edition of the Australian Tri-Series, with Australia playing host to India and New Zealand. The series was a part of the Indian and New Zealand tours.

After matches were played in Adelaide, Brisbane, Melbourne, Sydney and Perth throughout the entire group-stage, Australia and New Zealand qualified for the finals where after the underarm incident in the third final, Australia went on to win 3–1.