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.
The name "Blauvelt", of Dutch origin, is that of a prominent family that settled in the area in the 17th century. The etymology of the name probably comes from the coat of arms adopted by the first Blauvelt, Pieter Blauwveld, a prominent trader in the Netherlands. Literally, it means "blue-field", or "blue pasture fields", likely a reference to the blue and yellow shields hung on Pieter's ships (a common 14th century Dutch method of identifying the owner). The first Blauvelt in America was a peasant farmer who worked on Kiliaen van Rensselaer's estate cultivating tobacco, in 1638.In 1909, New York State purchased property in Blauvelt to create Camp Bluefields, a large rifle range used to train members of the New York National Guard prior to World War I. The property was later used by the YWCA, ROTC,Columbia University and the U.S. Army for various purposes before being abandoned following World War II. The land is today the site of Blauvelt State Park.