East Brunswick is a township in Middlesex County, New Jersey, United States. The suburban community is part of the New York City metropolitan area and is located on the southern shore of the Raritan River, directly adjacent to the city of New Brunswick. According to the 2010 United States Census, the township's population was 47,512, reflecting an increase of 756 from the 46,756 counted in the 2000 Census, which had in turn increased by 3,208 from the 43,548 counted in the 1990 Census.East Brunswick was incorporated as a township by an act of the New Jersey Legislature on February 28, 1860, from portions of both Monroe Township and North Brunswick Township. Portions of the township were taken to form Washington town within the township, Helmetta, Milltown and Spotswood.As of the 2010 Census, the United States Census Bureau calculated that New Jersey's center of population was located a few hundred feet east of Nenninger Lane, near the New Jersey Turnpike.