Duchess Mary

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