Including the previous incarnations as the Home Nations and Five Nations, this was the eighty-fifth series of the northern hemisphere rugby union championship.

Ten matches were played between 20 January and 17 March.

Wales were the champions for the second consecutive season, winning a record twenty-first outright title.

In beating Scotland, Ireland and England they also won the Triple Crown for a record fourth successive season and extended their record number of Triple Crown wins to sixteen.

This would be the last time that Wales won back-to-back championships until 2013.