Upper Saddle River is a borough in Bergen County, New Jersey. As of the 2010 United States Census, the borough's population was 8,208, reflecting an increase of 467 (+6.0%) from the 7,741 counted in the 2000 Census, which had in turn increased by 543 (+7.5%) from the 7,198 counted in the 1990 Census.
Upper Saddle River had a per capita income of $73,639 and was ranked 20th in New Jersey based on data from the 2006-2010 American Community Survey from the United States Census Bureau, more than double the statewide average of $34,858. In the 2013-2017 ACS, Upper Saddle River had a median household income of $176,674 (ranked 8th in the state) and included 42.9% of households earning more than $200,000 annually.
Upper Saddle River was originally settled by the Lenape Native Americans and was colonized in the 18th century principally by Dutch settlers who built mills along the Saddle River. The area was granted borough status in 1894 and remained principally rural until the 1950s. The suburban growth of New Jersey affected Upper Saddle River and surrounding municipalities, as the borough's population increased tenfold from 1950 to 1970. The population has remained fairly constant since 1970.
Predominantly a residential community consisting of one-acre (4,000 m2) lots, Upper Saddle River also contains a library, police station, fire station, ambulance corps, municipal hall, and three primary schools. Commerce and industry are concentrated along the town's western border along Route 17. Postal service is shared with the neighboring borough of Saddle River.
Upper Saddle River was formed as a borough by an act of the New Jersey Legislature on November 22, 1894, from portions of Hohokus Township and Orvil Township, based on the results of a referendum held two days earlier. 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.