William Jovanovich (1920 – 4 December 2001) was an American publisher, author, and businessman of Serbian origin. He served as the director of the publishing firm Harcourt, Brace & World from 1954 to 1991, renamed Harcourt, Brace, Jovanovich in his honor in 1970. He also owned Sea World marine parks, and wrote both fiction and non-fiction.