Martin Smith may refer to:
Arts and entertainment
- Martin Seymour-Smith (1928–1998), British poet, literary critic, biographer and astrologer
- Martin Cruz Smith (born 1942), American writer
- Martin Smith (drummer) (1946–1997), British drummer for Gentle Giant and Simon Dupree and the Big Sound
- Martin Smith (potter) (born 1950), English potter and professor of ceramics and glass
- Martin Smith (actor/musician) (1957–1994), British actor, singer and composer
- Martin Smith (documentarian), American filmmaker for the series Frontline
- Martin Smith (English musician) (born 1970), English vocalist, guitarist and songwriter, previously front man of Delirious?
- Martin Smith (film maker), Scottish BAFTA winning writer/director of Tracks
- Martin A. Smith (born 1962), English record producer, musician and composer
Government and politics
- Martin Tucker Smith (1803–1880), British banker and Member of Parliament for Wycombe and Midhurst
- Martin F. Smith (1891–1954), American politician
- Martin T. Smith (1934-2015), American politician and lawyer
- Martin Hamilton-Smith (born 1953), South Australian politician
- Martin Smith (activist) (born 1963), British political activist
Sports
- Martin Smith (boxer) (born 1936), Irish boxer
- Martin Smith (swimmer) (born 1958), British swimmer
- Martin Smith (footballer) (born 1974), British former professional footballer
- Martin Smith (snooker player) (born 1961), British snooker player
- Martin Smith (footballer, born 1995), British footballer