Hopewell Township is a township in Cumberland County, New Jersey, in the 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 4,571, reflecting an increase of 137 (+3.1%) from the 4,434 counted in the 2000 Census, which had in turn increased by 219 (+5.2%) from the 4,215 counted in the 1990 Census.
Hopewell Township was first formed as a precinct on January 19, 1748, and was incorporated by an Act of the New Jersey Legislature on February 21, 1798, as one of New Jersey's initial group of 104 townships. Portions of the township have been taken to form Columbia Township (March 12, 1844, returned to Hopewell Township on March 11, 1845), Cohansey Township (March 6, 1848) and Shiloh borough (April 9, 1929).