| Series: | 1980–81 World Series |
| Date: | 23 November 1980 – 3 February 1981 |
| Place: | Australia |
| Result: | Won by 3–1 in final series |
| Captain1: | Greg Chappell |
| Captain2: | Sunil Gavaskar |
| Captain3: | Geoff Howarth |
| Runs1: | Greg Chappell (686) |
| Runs2: | Dilip Vengsarkar (221) |
| Runs3: | John Wright (511) |
| Wickets1: | Dennis Lillee (25) |
| Wickets2: | Dilip Doshi (15) |
| Wickets3: | Martin Snedden (17) |
| Previous: | 1979–80 |
| Next: | 1981–82 |
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.
| Australia | |
| A Pattern La: | _greenborder |
| A Pattern B: | _thingreensides |
| A Pattern Ra: | _greenborder |
| A Leftarm: | FFFE00 |
| A Body: | FFFE00 |
| A Rightarm: | FFFE00 |
| A Pants: | FFFE00 |
| A Title: | Australia Kit |
| India | |
| A Pattern La: | _yellowborder |
| A Pattern B: | _thinyellowsides |
| A Pattern Ra: | _yellowborder |
| A Leftarm: | 86D1FD |
| A Body: | 86D1FD |
| A Rightarm: | 86D1FD |
| A Pants: | 86D1FD |
| A Title: | India Kit |
| New Zealand | |
| A Pattern La: | _blackborder |
| A Pattern B: | _thinblacksides |
| A Pattern Ra: | _blackborder |
| A Leftarm: | C8AD7F |
| A Body: | C8AD7F |
| A Rightarm: | C8AD7F |
| A Pants: | C8AD7F |
| A Title: | New Zealand Kit |
| Team | ||||||||
|---|---|---|---|---|---|---|---|---|
| 10 | 6 | 3 | 0 | 1 | 13 | 4.259 | ||
| 10 | 5 | 4 | 0 | 1 | 11 | 4.109 | ||
| 10 | 3 | 7 | 0 | 0 | 6 | 3.947 |
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