Sewaren is a census-designated place and unincorporated area within Woodbridge Township, in Middlesex County, New Jersey, United States. As of the United States 2000 Census, the CDP population was 2,780. PSE&G's Sewaren Generating Station is a 582 megawatt facility on 152 acres (62 ha) 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. Generator 5 was dismantled in 2002.