There is more than one person named Mark Smith:

• Mark Smith (R/C modeling pioneer), R/C modeling pioneer
• Mark Smith (baseball outfielder) (Born May 7, 1970), a Major League Baseball player.
• Mark Smith (baseball pitcher) (Born November 23, 1955), a Major League Baseball player.
• Mark Smith (hockey), a professional ice hockey players for the San Jose Sharks.
• Mark "Wiff" Smith, drummer for Play Dead.
• Mark Smith, guitarist in American post-rock band Explosions in the Sky.
• Mark Smith (Gladiator), one of the more famous characters from the United Kingdom TV Show, Gladiators.
• Mark Smith (radio personality), sports anchor for radio station WWJ-AM in Detroit, Michigan.
• Mark Smith (softball), Canadian softball player and coach