Gráinne, or Grainne, may refer to:

People[edit]

• Gráinne (given name), feminine given name in the Irish language

Fiction/Mythology[edit]

• Gráinne, a character in the Fenian Cycle of Irish mythology
• Finn and Gráinne, short story
• The Pursuit of Diarmuid and Gráinne, story from the Fenian Cycle of Irish mythology,
• Gráinne, a book by Keith Roberts

Ships[edit]

• LÉ Grainne (CM10), mine-sweeper