Sir Frederick Lincoln Ralphs (17 February 1909 – 16 October 1978) was a British education officer and student activist. Ralphs was born in Wellington, Shropshire, to a Methodist family who had been victimised for their involvement with trade unions. They moved to Sheffield while Ralph was young, and he attended Firth Park Grammar School and the University of Sheffield, where he graduated in both science and in law. While there, he became involved with the National Union of Students (NUS), and served as President of the NUS from 1934 to 1936. From 1937 to 1938, he was also President of the International Confederation of Students.