Elwyn Gwyther (8 March 1921 - 21 March 1996) was a Welsh rugby union and professional rugby league footballer who played in the 1940s and 1950s. He played representative level rugby union (RU) for Wales XV, and at club level for Llanelli RFC, as a prop, i.e. number 1 or 3, and representative level rugby league (RL) for Great Britain and Wales, and at club level for Belle Vue Rangers and Leeds, as a prop, i.e. number 8 or 10, during the era of contested scrums.