is a township in central Essex County, New Jersey, United States. As of the United States 2000 Census, the township population was 44,943. West Orange adjoins the South Mountain Reservation.
According to the United States Census Bureau, the township has a total area of 12.2 square miles (31.7 km
The oldest and most densely populated part of the township lies in the low valley along the border with the City of Orange, between Montclair Township in the north and South Orange Township to the south ("down the hill"). The Edison National Historic Site is located on Main Street in this section, and several major east-west arteries of the Newark street grid have their western terminus here, notably Central and Park Avenues. Downtown West Orange has a more urban character than the rest of the township.
Moving west, the neighborhoods along the First Watchung Mountain become increasingly suburban, ascending the steep hill along Northfield, Mount Pleasant, and Eagle Rock Avenues. The housing stock in neighborhoods of Hutton Park and the First Mountain neighborhoods is a mixture of 19th-century and Jazz Age estates, large pre-war Tudor-style houses, garden apartments, and post-war suburban houses. Llewellyn Park, one of the country's first planned communities, is also located on the First Mountain. These parts of town overlook downtown West Orange and many streets, often called terraces, have sweeping views of the skylines of downtown Newark and New York City.
Beyond the high ridge of Prospect Avenue ("up the hill"), the township transitions to a predominantly post-war suburban neighborhood, interspersed with pockets of older homes, golf courses, and shopping centers, sloping back down toward Pleasant Valley Way. Pleasantdale includes a business district and large Orthodox Jewish community.
The westernmost section of West Orange lies along the eastern face of the Second Watchung Mountain, and includes a large part of South Mountain Reservation. The post-war housing stock in this neighborhood resembles Pleasant Valley, bordering the townships of Millburn, Maplewood and Livingston.