Washington Township was incorporated by an act of the New Jersey Legislature on February 17, 1836, from portions of Deptford Township. The township officially moved to the newly created Camden County on March 13, 1844. Monroe Township was created on March 3, 1859, from part of the township. Most of Washington Township, along with all of Monroe Township, was moved back into Gloucester County on February 28, 1871, with the remaining portions of Washington Township that were still in Camden County being transferred to Gloucester Township. Additional transfers to Gloucester Township were made in 1926 and 1931.[27] The township was named for George Washington, one of more than ten communities statewide named for the first president.[28][29] It is one of five municipalities in the state of New Jersey that share the name Washington Township.[30] The borough of Washington is surrounded by Washington Township in Warren County.
The township is part of the Delaware Valley, also known as the Philadelphia metropolitan area,[31] and the South Jersey region of the state. In 2008, CNN and Money magazine ranked Washington Township 58th on its list of the "100 Best Cities to Live in the United States".[32]
^Rondinaro, Gene. "Washington Slept Here And There And. . .", The New York Times, February 17, 1985. Accessed October 21, 2015. "First in war, first in peace and, come tomorrow, first in the hearts of his countrymen, George Washington may be nowhere more fondly remembered than in New Jersey, where 12 communities are named for him. The profusion of such names - six Washington Townships, one each in Bergen, Burlington, Gloucester, Mercer, Morris and Warren Counties; Washington in Warren, Washington Crossing in Mercer, Washington Heights and Washington Park in Middlesex, Washingtonville in Sussex and Washington Valley in Morris - causes problems."
^Wilk, Tom. "Awash in Washingtons: New Jersey has six towns named for the father of our country.", New Jersey Monthly, January 17, 2011. Accessed October 22, 2015. "In New Jersey, Washington can lay claim to another first. He's number one in names selected for the state's 566 municipalities. Bergen, Burlington, Gloucester, Morris and Warren counties all have a Washington Township. Warren also has a Washington Borough surrounded—naturally—by Washington Township. The largest is Gloucester County's Washington, with 52,096 people; the smallest is the Washington in Burlington, with a population of 649. New Jersey had a sixth Washington Township in Mercer County until 2008, when voters there approved a name change to Robbinsville."