Sewaren is an unincorporated community and census-designated place within Woodbridge Township, Middlesex County, New Jersey, United States. As of the 2020 census, the CDP's population was 2,885. PSE&G's Sewaren Generating Station is a 538-megawatt facility on 152 acres along the Arthur Kill. The facility had five steam generators and one combustion turbine. Four of the steam units were installed during and just after World War II, from 1942 to 1951.