Mary Byrne
Mary Byrne may refer to:
- Mary Byrne (mayor), mayor of Galway
- Mary Byrne (singer), Irish singer, 2010 The X Factor UK contestant
- Mary Ann Byrne, Irish nationalist
- Mary Elizabeth Byrne, Irish author and linguist
- Mary Freeman Byrne, American author
- Mary Gregg Byrne, American portraitist, illustrator, and landscape artist
- Mary Byrne (witness), Irish woman considered to be the chief witness of the apparition at Knock, County Mayo
- Mary Martha Byrne, American actress
- Mary Rose Byrne, Australian actress
- Mary Green (painter), British painter born Mary Byrne