Menlo Park Terrace is an unincorporated community and census-designated place in Woodbridge Township, Middlesex County, New Jersey, United States. As of the 2020 census, its population was 2,806. The community is in northeastern Middlesex County, in the western part of Woodbridge Township. It is bordered to the north and east by Iselin a…Menlo Park Terrace is an unincorporated community and census-designated place in Woodbridge Township, Middlesex County, New Jersey, United States. As of the 2020 census, its population was 2,806. The community is in northeastern Middlesex County, in the western part of Woodbridge Township. It is bordered to the north and east by Iselin and to the south by Fords, both within Woodbridge Township, and to the west by the neighborhood of Menlo Park within Edison Township. It is located on the northwest side of U.S. Route 1, between Menlo Park Mall and Woodbridge Center at Exit 130 of the Garden State Parkway. US 1 leads southwest 9 miles to New Brunswick, the Middlesex county seat, and northeast 16 miles to Newark.