William Montagu, 4th Duke of Manchester (1771-1848), was a British nobleman known for his role in the House of Lords. He inherited the title from his father, the 3rd Duke, and was involved in various social and political activities during his lifetime. The Duke was also a prominent landowner, managing estates in England and Scotland. In addition to his noble duties, the 4th Duke was known for his interest in the arts and culture. He was a patron of several artists and contributed to the development of British society during the early 19th century. His legacy includes the continued prominence of the Montagu family in British history.