Nanuet is a hamlet and census-designated place in the town of Clarkstown, Rockland County, New York,United States. It is located north of Pearl River, south of New City, east of Spring Valley, and west of West Nyack. The population of Nanuet was 17,882 at the 2010 census.
The first name of the place was Clarkstown, a name it retained until 1856 when, at the suggestion of James De Clark, the present name was given by Munsee Chief (Nannawitt). Chief Nannawitt sold lands in North Jersey, signed the Wawayanda Patent and witnessed the Cheesecock Patent.Also according to the Times, the Erie Railroad arrived in Rockland County in 1841 along its original main line toPiermont. The New Jersey and New York Railroad, the predecessor of the Pascack Valley Line, reached Nanuet in 1869.