The Clermont State Historic Site, also known as the Clermont estate, the Clermont Manor or just Clermont, is a New York State Historic Site in southwestern Columbia County, New York, United States. It protects the former estate of the Livingston family, seven generations of whom lived on the site over more than two centuries.

The Livingston family of New York is a prominent family that migrated from Scotland to the Dutch Republic, and then to the Province of New York in the 17th century. Descended from the 4th Lord Livingston, its members included signers of the United States Declaration of Independence and the United States Constitution. Several members were Lords of Livingston Manor and Clermont Manor, located along the Hudson River in 18th-century eastern New York.