Northvale is a borough in Bergen County, New Jersey, United States. As of the United States 2000 Census, the borough population was 4,460. Northvale was formed on March 15, 1916, from the remaining portions of Harrington Township, based on the results of a referendum held on April 4, 1916. With the creation of Northvale, Harrington Township was dissolved. In 1923, portions of Northvale were transferred to Rockleigh.