Nosmo King may refer to several entertainment personalities, based on the term "No smoking":

• Nosmo King (album), by John Abercrombie and Andy LaVerne
• Character name of H. Vernon Watson (1886–1952), English variety artist, who used the name from the early 1930s to his death
• Alter ego of Paul Shannon (1909–1990), American radio announcer
• Stage name of Stephen Jameson (born 1949), who later led The Javells, a British Northern soul group