Leonard Sidney Woolf (; (1880-11-25)25 November 1880 – (1969-08-14)14 August 1969) was a British political theorist, author, publisher, and civil servant. He was married to author Virginia Woolf. As a member of the Labour Party and the Fabian Society, Woolf was an avid publisher of his own work and his wife’s novels. A writer himself, Woolf created nineteen individual works and wrote six autobiographies. Leonard and Virginia did not have any children.