Pennsville Township is a township in Salem County, New Jersey, United States. As of the 2010 United States Census, the township's population was 13,409, reflecting an increase of 215 (+1.6%) from the 13,194 counted in the 2000 Census, which had in turn declined by 600 (-4.3%) from the 13,794 counted in the 1990 Census. The township is named for William Penn.
Lower Penns Neck Township was formed on July 10, 1721, when Penn's Neck Township was subdivided and Upper Penns Neck Township (now Carneys Point Township) was also formed. The township was incorporated by an Act of the New Jersey Legislature on February 21, 1798, as one of New Jersey's original group of 104 townships. The township was renamed Pennsville Township based on the results of a referendum held on November 2, 1965.