Mark Miller may refer to:

• Mark D. Miller (1891–1970), Colorado photographer
• Mark Miller (actor) (1924–2022), television actor and producer, father of Penelope Ann Miller
• Mark Thomas Miller (born 1960), actor in the short-lived Misfits of Science TV series
• Mark Miller (musician), lead singer of the band Sawyer Brown
• Mark Alan Miller, vice president of Seraphim, comic book writer
• Mark Ian Miller, actor in Speed Demon (2003 film)

• Mark Miller (American football) (born 1956), American football quarterback
• Mark Miller (quarterback) (born 1962), American football quarterback
• Mark Miller (footballer) (born 1962), retired English football player and coach
• Mark Miller (racer) (born 1962), off-road racer, competing in both cars and on motorcycles
• Mark Miller (soccer) (born 1962), minor league U.S. soccer player
• Mark Miller (kickboxer) (born 1971), American kickboxer
• Mark Miller (basketball) (born 1975), American basketball player and coach
• Mark Miller (fighter) (born 1978), professional mixed martial artist
• Mark Miller (TT motorcyclist), American motorcycle racer
• Justin Miller (baseball, born 1977) full name: Justin Mark Miller (August 27, 1977 – June 26, 2013)

• Mark F. Miller (born 1943), Wisconsin state senator
• Mark Miller (Ohio), lawyer and librarian from Ohio, ran for Congress, 1992
• Mark Crispin Miller (born 1949), conspiracy theorist and professor of media studies at New York University
• Mark S. Miller, computer scientist, inventor of Miller Columns and the E programming language
• Mark Miller (Manitoba politician) - Councillor elected in the 1989 Winnipeg municipal election

• Mark Millar (born 1969), Scottish comic book writer
• Mark Millar (footballer) (born 1988), Scottish footballer
• Marc Miller (disambiguation)