 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.Rockleigh was incorporated as a borough by an act of the New Jersey Legislature on March 13, 1923 (based on the results of a referendum held on April 10, 1923) from portions of Northvale.The borough was named for a property in Virginia that had been owned by the borough's first mayor.