Port Royal is an incorporated town in Caroline County, Virginia, United States. The population was 126 at the 2010 census. Port Royal was established in the mid-17th century in the Colony of Virginia primarily as a port at the head of the navigable reach of the Rappahannock River for export of tobacco, Virginia's cash crop. The town developed along an early stage road, which brought passengers and freight for embarkation on ships at the river.