William Charles Franklyn Plomer CBE (10 December 1903 – 20 September 1973) was a South African and British author, known as a novelist, poet and literary editor. He also wrote a series of librettos for Benjamin Britten. He wrote some of his poetry under the pseudonym Robert Pagan.

Born of British parents in South Africa, he moved to England in 1929 after spending a few years in Japan. Although not as well known as many of his peers, he is recognised as a modernist and his work was highly esteemed by other writers, including Virginia Woolf and Nadine Gordimer. He was a homosexual, and at least one of his novels portrays a gay relationship, but whether he lived as openly gay himself is unclear.