David Hartley, the younger (1732 - 19 December 1813) was a British statesman, scientific inventor, and Member of Parliament (MP). He held the position of His Britannic Majesty's Minister Plenipotentiary, appointed by King George III to treat with the United States of America in the aftermath of the American Revolution. In this capacity, he signed the Treaty of Paris (1783), which ended the war and officially recognised the independence of the United States.