Demarest is a borough in Bergen County, New Jersey, United States. As of the 2010 United States Census, the borough’s population was 4,881, reflecting an increase of 36 (+0.7%) from the 4,845 counted in the 2000 Census, which had in turn increased by 45 (+0.9%) from the 4,800 counted in the 1990 Census. Located in the northeastern corner of New Jersey and its Gateway Region, Demarest is part of the New York City Metropolitan Area.

Demarest was formed by an act of the New Jersey Legislature on April 8, 1903, from portions of Harrington Township and Palisades Township.  The borough was named for the Demarest family and for the Demarest train station, which had in turn been named for Ralph S. Demarest, who was a director of the Northern Railroad of New Jersey that built the station and represented the area in both the New Jersey General Assembly and the New Jersey Senate in the mid-19th century.

According to the United States Census Bureau, the borough had a total area of 2.078 square miles (5.382 km²), including 2.067 square miles (5.353 km²) of land and 0.011 square miles (0.029 km²) of water (0.55%).

At the heart of Demarest is an area known as the Duck Pond, which is a section of the Tenakill Brook.

The borough borders the Bergen County municipalities of Alpine, Closter, Cresskill, Dumont and Haworth.

Source: Wikipedia