Mark Cox (born 5 July 1943) is a former tennis player from England, who played professional and amateur tennis in the 1960s, 1970s and 1980s. He was ranked as high as world No. 13 on the ATP rankings (achieving that ranking in August 1977). Cox was educated at Wyggeston Grammar School in Leicester and Millfield School in Somerset. Cox obtained an economics undergraduate degree from the University of Cambridge (Downing College), where he was a member of the Cambridge University Lawn Tennis Club.