Mark Stewart may refer to:
- Mark MacTaggart-Stewart (1834–1923), Scottish politician
- Mark Stewart (American football) (born 1959), football player
- Mark Stewart (artist) (born 1951), watercolor artist
- Mark Stewart (baseball) (1889–1932), American baseball player
- Mark Stewart (American musician), New York City based multi-instrumentalist
- Mark Stewart (footballer) (born 1988), Scottish footballer
- Mark Stewart (English musician) (1960–2023), founding member of The Pop Group
- Mark Stewart (politician) (born 1979), Queensland MP
- Stew (musician) (born 1961), singer/songwriter from Los Angeles
- Mark Stewart (cyclist) (born 1995), Scottish track cyclist
- Mark Stewart (rugby union), Scottish rugby union player