Clarkstown is a
town in
Rockland County,
New York,
United States. The town is on the eastern border of the county, located north of the town of
Orangetown, east of the town of
Ramapo, south of the town of
Haverstraw, and west of the
Hudson River. As of the 2010 census, the town had a total population of 84,187. The community of
New City, the county seat of Rockland County, is also the seat of town government and of the
Clarkstown Police Department, the county sheriff's police office, and the county correctional facility. New City makes up about 41.47% of the town's population.