Aaron Burr, in full Aaron Burr, Jr. (born February 6, 1756, Newark, New Jersey [U.S.]—died September 14, 1836, Port Richmond, New York, U.S.) third vice president of the United States (1801–05), who killed his political rival, Alexander Hamilton, in a duel (1804), and whose turbulent political career ended with his arrest for treason in 1807.