Mary is a given name that can refer to:
- Mary, mother of Jesus
- Mary I, Queen of England from 1553 to 1558
- Mary II, Queen of England from 1689 to 1694
- Mary Buchanan, mother of Angus Buchanan
- Mary Cattermole, a Muggle-born and wife of Reginald Cattermole
- Mary Dorkins, a Muggle television reporter
- Mary Doyle, a student at Hogwarts in the 1990s
- Mary Jauncey, an early American Auror
- Mary Macdonald, a Gryffindor student at Hogwarts in the 1970s
- Mary Riddle, the mother of Tom Riddle Snr
Behind the scenes
Real-world individuals with the given name Mary include:
- Mary Epworth: is an English musician who fronts the psychedelic rock group Mary Epworth and the Jubilee Band
- Mary GrandPré, an illustrator for the Harry Potter books
- Mary O'Mahony, plays an extra in the film adaptations of Harry Potter and the Deathly Hallows.