Mary Tudor may refer to:
- Mary I of England, daughter of Henry VIII and Catherine of Aragon, d.1558
- Mary Tudor, Queen of France, daughter of Henry VII of England, wife of Louis XII of France and then of Charles Brandon, 1st Duke of Suffolk
- Lady Mary Tudor (1673-1726), daughter of Charles II and Moll Davis; wife of 2nd Earl of Derwentwater, Henry Graham and James Rooke
- Mary Tudor, graduate student of Wendell Johnson, who conducted the Monster Study
- Marie Tudor, a play by the French playwright, Victor Hugo, which was based on Mary I of England
- Mary Tudor (The Tudors), fictional depiction of Mary I of England