Central Nyack is a hamlet in the Town of Clarkstown in Rockland County, New York, United States, approximately 20 miles north of New York City; it is north of Blauvelt; east of West Nyack; south of Valley Cottage, and west of the Village of Nyack. As an unincorporated community, governmental functions default to the town level. The community is located at latitu…Central Nyack is a hamlet in the Town of Clarkstown in Rockland County, New York, United States, approximately 20 miles north of New York City; it is north of Blauvelt; east of West Nyack; south of Valley Cottage, and west of the Village of Nyack. As an unincorporated community, governmental functions default to the town level. The community is located at latitude 41.094 and longitude -73.95. The elevation is 62 feet. The neighborhood is in a mountain-view area, situated just north of Buttermilk Falls County Park and Stephen Rowe Bradley Town Park.