 The borough shares borders with Carlstadt, Cliffside Park, Fairview, Fort Lee, Little Ferry, Palisades Park, Ridgefield Park and South Hackensack in Bergen County; and North Bergen in Hudson County.Undercliff Junction is an unincorporated community located within Ridgefield.The Census Bureau's 2006-2010 American Community Survey showed that (in 2010 inflation-adjusted dollars) median household income was $59,784 (with a margin of error of +/- $12,149) and the median family income was $76,618 (+/- $5,428).