The Triple Crown is also one of the laurels on offer in the Six Nations Rugby Championship. It is contested only by the home unions, i.e. England, Wales, Scotland and Ireland (the teams which originally made up the Four Nations championship, before the addition of France and later Italy). If one of these teams defeats each of the other three, they are awarded the Triple Crown; for example, if Ireland were to win their Six Nations matches against England, Scotland and Wales.

The Triple Crown is one of the many sub-challenges within the Six Nations. Others include the Calcutta Cup which is contested between England and Scotland.