Richard Clement Charles "Clem" Thomas (28 January 1929 - 5 September 1996) was a Wales international rugby union player. A flanker, he represented Cambridge University R.U.F.C. in the Varsity Match in 1949 and played for Brynamman, Swansea, London Welsh and Harlequins. He earned 26 caps for Wales, between 1949 and 1959 and captained Wales in his last nine internationals. After retiring as a player he became a rugby union journalist and author of books on the game.