Chateaugay is a town in Franklin County, New York, United States. As of the 2010 census, the town population was 2,155. The name is derived from a location in France, which was applied to a local land grant.
The first settlement took place in 1796.
The town was formed in 1799 before Franklin County was established from parts of the Towns of Champlain and Plattsburgh. By 1802, Chateaugay comprised most of Franklin County. Subsequently, its territory was reduced to form other towns. The Town of Malone was set off from Chateaugay in 1805. When Franklin County was established from Clinton County, part of Chateaugay remained in Clinton County. The Town of St. Armand was taken off in 1822 and placed in Essex County. The remaining three towns derived from Chateaugay remained in Franklin County: Bellmont (1833) and Franklin (taken from Bellmont in 1834), and Burke (1844), .
Chateaugay was the hometown of Orville H. Gibson. Orville Gibson founded the Gibson Guitar Corporation in 1902. Gibson died August 21, 1918 in St. Lawrence State Hospital, a psychiatric center in Ogdensburg, New York.
In 1856, a tornado demolished more than one hundred structures in the town.
In 1868, the community of Chateaugay set itself off by incorporating as a village.
Since 1934, the McCadam Cheese Cooperative (founded in 1876) has made cheddar cheese in Chateaugay.