Dayton, Jonathan (1760–1824), a United States political leader. He was born in Elizabeth, New Jersey. Dayton served in the Revolutionary army, the Continental Congress, and the New Jersey assembly. At 27, he was the youngest signer of the U.S. Constitution. Dayton was a Federalist representative in Congress, 1791–99, and was Speaker of the House, 1795–99. He served in the Senate, 1799–1805. Dayton, Ohio, where he owned land, was named for him in 1805. Dayton was involved in Aaron Burr's treason plot in 1807. He was indicted for his part in the plot but was not prosecuted.