Sir Martin Roth FRS (6 November 1917, Budapest – 26 September 2006, Cambridge) was a British psychiatrist. He was Professor of Psychiatry, University of Cambridge, 1977–85, then Professor Emeritus, and was a Fellow of Trinity College, Cambridge from 1977. He was one of the pioneers in developing Psychogeriatrics as a subspecialty. Roth was also a trustee of the , a charity founded by Miriam Rothschild. He is buried in Cambridge City Cemetery.