The 1955 Five Nations Championship was the twenty-sixth series of the rugby union Five Nations Championship.

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

Ten matches were played between 8 January and 26 March.

It was contested by England, France, Ireland, Scotland and Wales.

France missed out on a maiden Grand Slam after losing to Wales at Stade Colombes.