 This ranking also makes the borough the seventh best place to live in Bergen County.According to the United States Census Bureau, Oradell borough had a total area of 2.577 square miles (6.673 km2), including 2.424 square miles (6.278 km2) of land and 0.153 square miles (0.395 km2) of water (5.92%).Unincorporated communities, localities and place names located partially or completely within the borough include Delford.