Oradell is a borough in Bergen County, New Jersey, United States. At the 2010 United States Census, the borough's population was 7,978, reflecting a decline of 69 (-0.9%) from the 8,047 counted in the 2000 Census, which had in turn increased by 23 (+0.3%) from the 8,024 counted in the 1990 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.
Oradell was originally formed on March 8, 1894, as the borough of Delford, from portions of Harrington Township, Midland Township and Palisades Township, at the height of the "Boroughitis" phenomenon then sweeping through Bergen County. The name "Delford" was a portmanteau created from the names of two communities within the new borough: Oradell and New Milford. The Hotel Delford had been constructed in 1870 after the construction of the first railroad to reach the area. On November 12, 1920, the borough's name was officially changed to "Oradell", based on the results of a referendum held ten days earlier.
New Jersey Monthly magazine ranked Oradell as the 68th best place to live in New Jersey in its 2010 rankings of the "Top Towns" in the state. This ranking also makes the borough the seventh best place to live in Bergen County.