Montvale is a borough in Bergen County, New Jersey, United States. As of the 2010 United States Census, the borough's population was 7,844, reflecting an increase of 810 (+11.5%) from the 7,034 counted in the 2000 Census, which had in turn increased by 88 (+1.3%) from the 6,946 counted in the 1990 Census.
Montvale was incorporated as a borough on August 31, 1894, from portions of Orvil Township and Washington Township. The borough was formed during the "Boroughitis" phenomenon then sweeping through Bergen County, in which 26 boroughs were formed in the county in 1894 alone. On February 15, 1896, Montvale acquired part of Orvil Township. In 1906, Montvale added further land from Orvil and Washington townships, and in 1912, Montvale added territory from Upper Saddle River. On May 20, 1959, portions of Montvale were passed to River Vale, and on December 9 and 14, 1965, territories were exchanged between Montvale and Upper Saddle River. The borough's name is derived from its topography.
Harry De La Roche Jr. was convicted in 1976 of first degree murder and sentenced to life in prison for the murder of his parents and his two brothers. The incident was recounted in the 2008 documentary Harry: A Communication Breakdown written, produced and directed by Jon Doscher and Fran Ganguzza, based on Roberta Roesch's book Anyone's Son.
According to the United States Census Bureau, the borough had a total area of 4.009 square miles (10.383 km2), including 4.000 square miles (10.359 km2) of land and 0.009 square miles (0.024 km2) of water (0.23%).
The borough borders six neighboring municipalities: Park Ridge, River Vale, Upper Saddle River and Woodcliff Lake in Bergen County; and both Pearl River (in the Town of Orangetown) and Chestnut Ridge (in the Town of Ramapo) in Rockland County, New York.
Unincorporated communities, localities and place names located partially or completely within the township include Chestnut Ridge and Upper Montvale.
Montvale is served by the Garden State Parkway at exits 171 and 172, as well as the New York State Thruway in Chestnut Ridge.
The 2010 United States Census counted 7,844 people, 2,778 households, and 2,202.954 families in the borough.