North River is a hamlet in the Town of Johnsburg, in Upstate New York, within the Adirondack Mountains. It is located on the upper Hudson River five miles north of the hamlet of North Creek in Warren County, on the northern border with Hamilton County. Historically it was one of the centers of the New York State garnet industry. The last remaining garnet mine in New York is located in North River. The hardest garnets in the world come from the Adirondacks and are still in demand, especially for industrial use. There is also a former garnet mine, the Hooper Mine, that is a tourist site.