River Edge is a borough in Bergen County, New Jersey, United States. As of the 2010 United States Census, the borough's population was 11,340, reflecting an increase of 394 (+3.6%) from the 10,946 counted in the 2000 Census, which had in turn increased by 343 (+3.2%) from the 10,603 counted in the 1990 Census.
The community was originally incorporated as the borough of Riverside by an Act of the New Jersey Legislature on June 30, 1894, from portions of Midland Township, based on the results of a referendum held the previous day. On December 1, 1930, the borough's name was changed to River Edge. The borough was formed during the "Boroughitis" phenomenon then sweeping through Bergen County, in which 26 boroughs were formed in the county in 1894 alone.