Newcomb is a town in Essex County, New York, United States. The population was 436 at the 2010 census.
The town is on the western border of the county. It is 86 miles (138Â km) by road southwest of Plattsburgh, 77 miles (124Â km) southwest of Burlington, Vermont, 110 miles (180Â km) northeast of Utica, 112 miles (180Â km) north-northwest of Albany, and 146 miles (235Â km) south-southwest of Montreal. The town is inside the Adirondack Park and contains the Lake Harris Campground. The town is the largest by area in Essex County.