Samuel Ross Mason, also spelled Meason (November 8, 1739 – 1803), was a militia captain, on the American western frontier, during the American Revolutionary War. After the war, he became the leader of the Mason Gang, a criminal gang of river pirates and highwaymen on the lower Ohio River and the Mississippi River in the late 18th and early 19th centuries. He was associated with outlaws around Red Banks, Cave-in-Rock, Stack Island, and the Natchez Trace.