Greenwich is an unincorporated community and census-designated place (CDP) in Cumberland County, in the U.S. state of New Jersey. It is in the western part of the county, in the southeast part of Greenwich Township, on the northwest side of the tidal Cohansey River, northeast of its mouth at Delaware Bay. The community is southwest of Bridgeton, the county seat.
Greenwich was first listed as a CDP prior to the 2020 census. The area along both sides of Ye Greate Street, the main street in the community, comprises the Greenwich Historic District, listed on the National Register of Historic Places. The district continues north to the community of Othello.
Greenwich was first listed as a census designated place in the 2020 U.S. census.
As of 2020, the population was 251.
Students are zoned to Greenwich Township School District (for elementary school) and Cumberland Regional School District (for high school).
The Greenwich school district and the Stow Creek Township School District have a cooperative agreement in which all students in grade levels Kindergarten through 4 in both school districts attend the Greenwich Township school facility, Morris Goodwin School, while all students in grades 5-8 in both school districts attend the Stow Creek school facility, Stow Creek School.