The Duchess of Marlborough is a title in the British peerage, traditionally associated with the Marlborough family. The most famous holder of this title was Sarah Churchill, the first Duchess, who was a close friend and confidante of Queen Anne. She played a significant role in politics and society during the early 18th century. The title was created in 1702 and has been held by several women over the years. The Duchess of Marlborough is often recognized for her influence and contributions to the Whig party, as well as her involvement in the War of the Spanish Succession.