Greenwich Township is a township in Gloucester County, New Jersey, United States. As of the 2010 United States Census, the township's population was 4,899, reflecting an increase of 20 (+0.4%) from the 4,879 counted in the 2000 Census, which had in turn declined by 223 (-4.4%) from the 5,102 counted in the 1990 Census.Greenwich Township was first formed on March 1, 1695, and was formally incorporated as one of New Jersey's initial group of 104 townships by an act of the New Jersey Legislature on February 21, 1798. Over the centuries, portions of the township were taken to form Woolwich Township (March 7, 1767), Franklin Township (January 27, 1820), Spicer Township (March 13, 1844; now Harrison Township), Mantua Township (February 23, 1853), East Greenwich Township (February 10, 1881) and Paulsboro (March 2, 1904). The township was named for Greenwich, England.GeographyAccording to the United States Census Bureau, the township had a total area of 12.032 square miles (31.164 km2), including 8.969 square miles (23.231 km2) of land and 3.063 square miles (7.934 km2) of water (25.46%).
