Martin James Cranie (born 26 September 1986) is an English professional footballer who plays as a centre back for Championship club Luton Town. He is a former England U21 international. He began his career with the Southampton youth academy before moving to local rivals Portsmouth and later to Coventry City after several loan spells, then followed by three years at Barnsley.
Born at Yeovil, Somerset, Cranie attended the local Buckler's Mead Community School between 1998 and 2003 after completing his primary school education at Birchfield Community School.
Following an injury crisis at the club, then Manager Paul Sturrock was forced to use Cranie in the first-team against Chelsea in May 2004. However, his debut was marred when he inadvertently scored an own-goal, in a 4–0 loss against Chelsea. After the match, Cranie's teammate Danny Higginbotham said: "He's a very good player with a bright future who certainly didn't look out of place at all." Cranie, one of the youngest post-war players to make their debut for the club, described it as a "good experience". "I was asked to play left wing-back, which I had never played before, but being out on the pitch with some of those players was unbelievable."