2006 Tri Nations Series

The 2006 Tri Nations Series, an annual rugby union competition between the national teams of Australia, New Zealand and South Africa, marked the tenth anniversary of the original competition. With three rounds still remaining, the New Zealand All Blacks were assured of first place in the competition after their victory over Australia on 19 August, their 21st consecutive home win.

This year, for the first time, each team played the others three times, instead of twice, as had been the case previously. This was the result of a new television deal between SANZAR, the consortium of the three countries' rugby federations that organises the tournament, and broadcasters in the SANZAR countries and the United Kingdom. As a result, the duration of the competition was extended and it ran from 8 July to 9 September.

The All Blacks won all three matches against Australia, thus retaining the Bledisloe Cup. They also won two of their three matches against South Africa, thereby winning the Freedom Cup for the first time. Australia regained the Mandela Challenge Plate after winning their two home tests against South Africa.