Pilesgrove Township is a township in Salem County, New Jersey, United States. As of the 2010 United States Census, the township's population was 4,016, reflecting an increase of 93 (+2.4%) from the 3,923 counted in the 2000 Census, which had in turn increased by 673 (+20.7%) from the 3,250 counted in the 1990 Census.
Pile's Grove was first mentioned in a deed dated April 15, 1701, through the date of the township's original corporation is unknown. Pilesgrove was incorporated as one of New Jersey's original group of 104 townships that were established on February 21, 1798. Portions of the township were taken on December 6, 1769, to form Pittsgrove Township and on July 26, 1882 to create Woodstown.