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 from the 2010 census count of 7,978, which in turn reflected a decline of 69 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 northwest of Midtown Manhattan.