Bridgewater Township is a township in Somerset County, New Jersey, United States. As of the 2010 United States Census, the township's population was 44,464, reflecting an increase of 1,524 (+3.5%) from the 42,940 counted in the 2000 Census, which had in turn increased by 10,431 (+32.1%) from the 32,509 counted in the 1990 Census.Bridgewater Township was originally created by Royal charter on April 4, 1749, from portions of the Northern precinct. It was incorporated as one of New Jersey's initial group of 104 townships by the New Jersey Legislature on February 21, 1798, under the Township Act of 1798. During the nineteenth century, portions of the township were taken to form Warren Township (March 5, 1806), Branchburg Township (April 5, 1845), Somerville (March 25, 1863), Raritan (April 3, 1868) and Bound Brook (March 24, 1869).HistoryBridgewater is a relatively large, suburban township located in the center of Somerset County. The area of the present Township of Bridgewater was originally purchased from a local Lenape Native American tribe. Bridgewater was chartered by George II of Great Britain in 1749, and incorporated on February 21, 1798, as one of New Jersey's 104 original townships. It is named after the town of Bridgwater in the English county of Somerset.