Northvale is a borough in Bergen County, in the U.S. state of New Jersey. As of the 2020 United States census, the borough's population was 4,761, an increase of 121 (+2.6%) from the 2010 census count of 4,640, which in turn reflected an increase of 180 (+4.0%) from the 4,460 counted in the 2000 census.

Rockleigh is a borough in northeastern Bergen County, in the U.S. state of New Jersey. As of the 2020 United States census, the borough's population was 407, a decrease of 124 (−23.4%) from the 2010 census count of 531, which in turn reflected an increase of 140 (+35.8%) from the 391 counted in the 2000 census. Bordering Alpine, a community ranked America's most expensive ZIP Code by Forbes, Rockleigh has a similar residential character, with large single-family homes on large plots of land.