Mark Leslie Norton (February 7, 1956 – April 5, 2007), better known as Mark St. John, was an American guitarist best known for his brief stint with the hard rock band Kiss from April to November 1984. His work can be heard on the band's 1984 album Animalize and their 2023 live album Off the Soundboard: Poughkeepsie, NY. After leaving Kiss, he co-founded the band White Tiger.
