Sir Lynton Keith Crosby AO (born 23 August 1956) is an Australian political strategist who has managed election campaigns for right-of-centre parties in several countries. Crosby has been described as a "master of the dark political arts", "the Wizard of Oz", and "the Australian Karl Rove". In 2002, he was called "one of the most powerful and influential figures in the nation" by The Age.