Chaumont is a village in Jefferson County, New York, in the United States. Its population was 624 at the 2010 census. The village is named for Jacques-Donatien Le Ray de Chaumont, son of Franklin's landlord and friend at Passy in France.
In 1750, Ray had bought the Chaumont castle (named from the Old French for "bald hill", and built in two periods around 1500), in the Loire Valley of France. (the village near it is called Chaumont-sur-Loire to distinguish it from the many other Chaumonts in France.) His son, known as James Leray or James Leray Chaumont travelled to the United States and later settled there.
The first European-descended settlement of the village began in 1802, replacing an unsatisfactory site chosen the previous year. The economy of the early village was based on fishing and ship building.
In July 1853, the community contained about fifty dwellings, along with other structures. Chaumont was incorporated as a village in 1874, and its historic core was listed on the National Register of Historic Places in 1990 as the Chaumont Historic District. The village has been proposed to be dissolved into the surrounding town of Lyme twice. The first dissolution referendum was defeated by a margin of 129–72 in March 1999; a second attempt was rejected by a 145–102 margin on November 6, 2012.