John Percival Leighfield CBE (born 1938) is a British IT industry businessman and was previously chairman of RM plc from 1993 until 2011.
John Leighfield is a Director of Getmapping, a UK supplier of aerial photography, mapping products and data hosting solutions.
Leighfield has pursued a career in IT, initially in the 1960s with the Ford Motor Company, where he did pioneering work on computer systems in finance and manufacturing, Plessey (where he was head of management services) and British Leyland (from the early 1970s).
In the Queen's Birthday Honours 1998 Leighfield was appointed as a Commander of the Most Excellent Order of the British Empire.
On 15 January 2016 Leighfield gave an in-depth interview to Alan Cane, Former Editor of the Financial Times, on his life and career for Archives of IT.