Tony Melville Ridley (born 1933) is a British civil engineer and professor. He worked as a design and site engineer in the US and Britain before becoming chief research officer of the highways and transport department of the Greater London Council. He became director-general of the Tyne & Wear Passenger Transport Executive in 1969 where he oversaw the development of plans for the Tyne and Wear Metro. In 1975 he was appointed managing director of the Hong Kong Mass Transit Railway Corporation. Ridley was later chief executive of London Underground and a director of engineering consultancy Halcrow Fox. He was president of the Institution of Civil Engineers from March 1995 to November 1996.