Ian Stewart may refer to:
- Ian Stewart (athlete) (born 1949), Scottish Olympic athlete
- Ian Stewart (Australian rules footballer) (born 1944), member of the Australian Football Hall of Fame
- Ian Stewart (baseball) (born 1985), major league baseball player
- Ian Stewart (diplomat), former New Zealand ambassador to Belgium, Italy and Thailand
- Ian Stewart (Labour politician) (born 1950), Scottish politician
- Ian Stewart (mathematician) (born 1945), English academic and science fiction author
- Ian Stewart (musician) (1938–1985), British musician and early member of the Rolling Stones
- Ian Stewart (Northern Irish footballer), member of the 1986 Northern Ireland Football World Cup team
- Ian Stewart (racing driver) (born 1929), Scottish Formula One driver
- Ian Stewart (RAF), current United Kingdom National Military Representative, Supreme Headquarters Allied Powers Europe (UK)
- Ian Stewart (Scottish footballer), Scottish football player and manager
- Ian Stewart, Baron Stewartby (born 1935), British Conservative Party politician and former MP for Hitchin, England
- Ian Duncan Stewart or Ian Brady (born 1938), British serial killer and author
- Ian MacAlister Stewart, brigadier general during the Second World War
- Ian Stewart, founder of Gremlin Interactive and Zoo Digital
Famous quotes containing the word stewart:
“Word’s gane to the kitchen,
And word’s gane to the ha’,
That Marie Hamilton gangs wi’ bairn
To the hichest Stewart of a’.”
—Unknown. Mary Hamilton (l. 1–4)