Sewaren is an unincorporated community and census-designated place (CDP) within Woodbridge Township, in Middlesex County, in the U.S. state of New Jersey. As of the 2010 United States Census, the CDP's population was 2,756.

Woodbridge Township is a township in northern Middlesex County, in the U.S. state of New Jersey. The township is a regional hub of transportation and commerce for central New Jersey and a major bedroom suburb of New York City, within the New York metropolitan area. Located within the core of the Raritan Valley region, Woodbridge Township hosts the junction of the New Jersey Turnpike and the Garden State Parkway, the two busiest highways in the state, and also serves as the headquarters for the New Jersey Turnpike Authority, which operates both highways.