Callum Smith (born 23 April 1990) is a British professional boxer.
He has held the WBA (Super) and Ring magazine super-middleweight titles since 2018, and won the World Boxing Super Series super-middleweight tournament in the same year.
Previously at regional level he held the European and British super-middleweight titles between 2015 and 2017.
As of October 2019, Smith is ranked as the world's best active super middleweight by the Transnational Boxing Rankings Board, BoxRec and ESPN, and the world's seventh best active boxer, pound for pound, by BoxRec.
He is the youngest of the Smith brothers—Paul, Stephen, and Liam—all of whom are professional boxers.