Lowville is a village in Lewis County, New York, United States. As of the 2010 census it had a population of 3,470. The village is in the Black River Valley, between the foothills of the Adirondack Mountains and the Tug Hill Plateau, in an area often referred to as the North Country. It is located in the center of Lewis County, in the southeastern part of the similarly named town of Lowville.