Westport is a town in Essex County, New York, United States overlooking Lake Champlain. The population was 1,312 at the 2010 census.The Town of Westport is on the eastern border of the county and is 35 miles (56 km) south of Plattsburgh and 93 miles (150 km) south of Montreal. Westport is inside the Adirondack Park.Westport is the birthplace of the Adirondack chair.The Essex County Fair is held in the town.