Major General Martin Linn Smith, CB, MBE (born 30 July 1962) is a former senior Royal Marines officer who served as Commandant General Royal Marines from 2014 to 2016. He was previously commander of 3 Commando Brigade, and before that Commanding Officer of 30 Commando Information Exploitation Group and Deputy Commander of 3 Commando Brigade. Smith is currently a non-executive adviser of Texo Group.