Duchess Mary is the name of:
Mary Stewart, Duchess of Richmond (1622–1685), English duchess Mary Howard, Duchess of Norfolk (died 1705) (c. 1659–1705), British peeress Mary Howard, Duchess of Norfolk (died 1773) (c. 1712–1773), British peeress Mary Osborne, Duchess of Leeds (1723–1764), British duchess Princess Mary, Duchess of Gloucester and Edinburgh (1776–1857), member of the British Royal Family Mary Russell, Duchess of Bedford (1865–1937), English pilot and ornithologist Mary Cavendish, Duchess of Devonshire (1895–1988), Chancellor of the University of Exeter Mary Somerset, Duchess of Beaufort (sportswoman) (1897–1987), Commander of the Order of St John Mary Montagu Douglas Scott, Duchess of Buccleuch (1900–1993), British duchess Mary Innes-Ker, Duchess of Roxburghe (1915–2014), British duchess
See also Duchess Maria (disambiguation) Duchess Marie (disambiguation)