Duchess Mary
Duchess Mary is the name of:
- Mary Stewart, Duchess of Richmond, English duchess
- Mary Howard, Duchess of Norfolk (died 1705), British peeress
- Mary Howard, Duchess of Norfolk (died 1773), British peeress
- Mary Osborne, Duchess of Leeds, British duchess
- Princess Mary, Duchess of Gloucester and Edinburgh, member of the British Royal Family
- Mary Russell, Duchess of Bedford, English pilot and ornithologist
- Mary Cavendish, Duchess of Devonshire, Chancellor of the University of Exeter
- Mary Somerset, Duchess of Beaufort (sportswoman), Commander of the Order of St John
- Mary Montagu Douglas Scott, Duchess of Buccleuch, British duchess
- Mary Innes-Ker, Duchess of Roxburghe, British duchess