Englewood Cliffs 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 5,342, an increase of 61 (+1.2%) from the 2010 census count of 5,281, which in turn reflected a decline of 41 (-0.8%) from the 5,322 counted in the 2000 census.