John Rowan (July 12, 1773July 13, 1843) was a 19th-century politician and jurist from the U.S. state of Kentucky. Rowan's family moved from Pennsylvania to the Kentucky frontier when he was young. From there, they moved to Bardstown, Kentucky, where Rowan studied law with former Kentucky Attorney General George Nicholas. He was a representative to the state constitutional convention of 1799, but his promising political career was almost derailed when he killed a man in a duel stemming from a drunken dispute during a game of cards. Although public sentiment was against him, a judge found insufficient evidence against him to convict him of murder. In 1804, Governor Christopher Greenup appointed Rowan Secretary of State, and he went on to serve in the Kentucky House of Representatives and the U.S. House of Representatives.