Sir Lennox Berkeley (May 12, 1903 - December 26, 1989) was a British composer.

He was born in Oxford, England, and educated at Merton College, Oxford. In 1927, he went to Paris to study music with Nadia Boulanger, and there he became acquainted with Francis Poulenc, Igor Stravinsky, Darius Milhaud, Arthur Honegger and Albert Roussel. The French influence would continue to be felt in his music. He worked for the BBC during the Second World War, and later became president of the Performing Rights Society . He was knighted in 1974. He held the chair of Professor of Composition at the Royal Academy of Music from 1946 to 1968, and his pupils there included Richard Rodney Bennett, David Bedford and John Tavener.

His son, Michael Berkeley, is also a composer.