Leonard Norman Cohen, CC, GOQ (born 21 September 1934) is a Canadian singer-songwriter, musician, poet and novelist. Cohen published his first book of poetry in Montreal in 1956 and his first novel in 1963. His work often explores religion, isolation, sexuality and interpersonal relationships. Famously reclusive, having once spent several years in a Zen Buddhist monastery, and possessing a persona frequently associated with mystique, he is extremely well regarded by critics for his literary accomplishments, for the richness of his lyrics, and for producing an output of work of high artistic quality over a five-decade career.

Musically, Cohen's earliest songs (many of which appeared on the 1967 album, Songs of Leonard Cohen) were rooted in European folk music. In the 1970s, his material encompassed pop, cabaret and world music. Since the 1980s, his high baritone voice has dipped into lower registers (bass baritone and bass), with accompaniment from a wide variety of instruments and female backup singers.

Over 2,000 renditions of Cohen's songs have been recorded. Cohen has been inducted into both the Canadian Music Hall of Fame and the Canadian Songwriters Hall of Fame and is also a Companion of the Order of Canada, the nation's highest civilian honour. While giving the speech at Cohen's induction into the American Rock and Roll Hall of Fame on 10 March 2008, Lou Reed described Cohen as belonging to the "highest and most influential echelon of songwriters."