Walter Stewart may refer to:

• Walter Stewart, 5th Earl of Menteith (1230s–1290s), also called Walter Bailloch or Walter Balloch
• Walter Stewart, 3rd High Steward of Scotland (c.died 1246)
• Walter Stewart, 6th High Steward of Scotland (c.1296–1327)
• Walter Stewart, Lord of Fife (c.1338–1362)
• Walter Stewart, Earl of Atholl (died 1437), Scottish nobleman
• Walter Stewart, 3rd Laird of Baldorran (c.1480–1575), Scottish landowner
• Walter Stewart, 1st Lord Blantyre (died 1617), Scottish nobleman
• Walter Stewart, Master of Blantyre (1851–1895), Scottish nobleman
• Walter Stewart (MP), Scottish courtier and politician in the House of Commons, 1624–25
• W. F. Alan Stewart (1885–1956), farmer and political figure in Prince Edward Island
• Walter Stewart, Solicitor General for Scotland 1720–21

• Walter Stewart (general) (1756–1796), Pennsylvania officer during the American Revolutionary War
• Walter Stewart (footballer) (1875–1926), Australian footballer in Victorian Football League (VFL)
• Walter W. Stewart (1885–1958), American economist
• Walter Stewart (journalist) (1931–2004), Canadian writer and educator
• Walter Stewart (priest), Archdeacon of St Andrews and Bishop-elect of Dunblane
• Alfred Walter Stewart (1880–1947), British chemist and part-time novelist
• Walter Stewart (american football coach) (2013 - Present), Current DL Coach for Cincinnati Bearcats