Stephen Decatur Sr. (June 1751 – November 11, 1808) was an American naval captain in the Revolutionary War and later in the Quasi-War. He was the father of Stephen Decatur Jr. Born in Newport, Rhode Island, Decatur was a merchant captain before the Revolution. He married Ann Pine; in addition to their son, they had two other children, Lieutenant James Decatur, who was killed in action in 1804 during the Barbary Wars, and Ann Decatur McKnight. During the American Revolution he commanded the Royal Louis, the Comet, the Retaliation, the Rising Sun, and the Fair American.