Pearl River is a hamlet and census-designated place in the town of Orangetown, Rockland County, New York, United States. It is east of Chestnut Ridge, south of Nanuet, west of Blauvelt, New York, and north of Montvale and Old Tappan, New Jersey. The population was 15,876 at the 2010 census.

Orangetown is a town in Rockland County, New York, United States, located in the southeastern part of the county. It is northwest of New York City, north of New Jersey, east of the town of Ramapo, south of the town of Clarkstown, and west of the Hudson River. The population was 48,655 at the 2020 census.