East Orange is a city in Essex County, New Jersey, United States. As of the 2010 United States Census the city's population was 64,270, reflecting a decline of 5,554 (−8.0%) from the 69,824 counted in the 2000 Census, which had in turn declined by 3,728 (−5.1%) from the 73,552 counted in the 1990 Census. The city was the state's 20th most-populous municipality in 2010, after having been the state's 14th most-populous municipality in 2000.
East Orange was originally incorporated as a township by an act of the New Jersey Legislature on March 4, 1863, from portions of Orange town, and was reincorporated as a city on December 9, 1899, based on the results of a referendum held two days earlier.
According to the United States Census Bureau, the city had a total area of 3.924 square miles (10.164 km2), all of it land.
East Orange shares borders with Newark to the east and south, South Orange to the southwest, Orange to the west, and Glen Ridge and Bloomfield to the north.
Unincorporated communities, localities and place names located partially or completely within the city include Ampere and Brick Church.
East Orange is officially divided into five wards, but is also unofficially divided into a number of neighborhoods.