Sir Denys Lionel Page, FBA (11 May 1908, Reading, Berkshire – 6 July 1978, Tarset) was a British classical scholar at Oxford and Cambridge universities. He was President of the British Academy from 1971–74.
Born at Reading, Page was the son of Frederick Harold Dunn Page, a chartered civil engineer of the Great Western Railway, and his wife Elsie Daniels. He was educated at St. Bartholomew's School, and (as a scholar) at Christ Church, Oxford, where he was taught by Gilbert Murray, and J. D. Denniston. In 1928, he won the Craven and De Paravicini scholarships, the Chancellor's Prize for Latin verse and the Gaisford Prize for Greek verse and a first class in classical honours moderations.
In 1930 he was awarded a First in Literae Humaniores. He was a fast bowler in the Christ Church cricket team.
Page went for a year to the University of Vienna as Derby scholar, where he worked under Ludwig Radermacher, then returned to Christ Church as a lecturer, the next year becoming Student and Tutor. In 1937 he became Junior Censor.
In 1939 Page was posted to GC&CS, Bletchley Park. In 1942 he became head of section ISOS and a member of the XX Committee. In 1944 he was Assistant Director, GC&CS.