Liam Mark Smith (born 27 July 1988) is a British professional boxer. He held the World Boxing Organization (WBO) light-middleweight title from 2015 to 2016. At regional level, he has held multiple light-middleweight championships, including the British and Commonwealth titles between 2012 and 2015. Smith is the younger brother of Paul Smith and Stephen Smith, and the older brother of Callum Smith; all of whom are professional boxers.