Oradell 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 8,244, an increase of 266 (+3.3%) from the 2010 census count of 7,978, which in turn reflected a decline of 69 (-0.9%) from the 8,047 counted in the 2000 census. The borough includes a dam on the Hackensack River that forms the Oradell Reservoir. Oradell is a suburb of New York City, located approximately 15 miles (24 km) northwest of Midtown Manhattan.