Upper Deerfield Township is a township in Cumberland County, New Jersey, United States. It is part of the Vineland-Millville-Bridgeton Primary Metropolitan Statistical Area for statistical purposes. As of the 2010 United States Census, the township's population was 7,660, reflecting an increase of 104 from the 7,556 counted in the 2000 Census, which had in turn increased by 629 from the 6,927 counted in the 1990 Census.
Upper Deerfield Township was incorporated as a township by an act of the New Jersey Legislature on February 23, 1922, from portions of Deerfield Township, based on the results of a referendum held on April 3, 1922. The township was named for Deerfield Township, which in turn was named for Deerfield, Massachusetts.
It is a dry town, where alcohol cannot be sold, as affirmed by a referendum passed in 1972. Upper Deerfield does not have its own police force and is protected by the New Jersey State Police.