North River is an alternative name for the southernmost portion of the Hudson River in the vicinity of New York City and northeastern New Jersey in the United States. The entire watercourse was known as the North River by the Dutch in the early seventeenth century; the term fell out of general use for most of the river's 300+ mile course during the early 1900s. The name remains in limited use among local mariners and others and on some nautical charts and maps. The term is also used for infrastructure on and under the river, such as the North River piers, North River Tunnels, and the North River Wastewater Treatment Plant.