Mary Cavendish
Mary Cavendish may refer to:
- Mary [Talbot, Countess of Shrewsbury] , née Mary Cavendish
- Mary Cavendish, [Duchess of Devonshire], née Mary Gascoyne-Cecil
- Mary Cavendish, [Duchess of Devonshire (1646–1710)], née Mary Butler
- Mary Cavendish, the maiden name of the wife of John [Fane, 7th Earl of Westmorland]