Blauvelt is a hamlet and census-designated place, formerly known as Greenbush and then Blauveltville, in the town of Orangetown, Rockland County, New York, United States. It is located north of Tappan, east of Nauraushaun and Pearl River, south of Central Nyack, and west of Orangeburg. As of the 2010 census, the CDP had a population of 5,689.