Wharton State Forest is the largest state forest in the U.S. state of New Jersey. It is the largest single tract of land in the state park system of New Jersey, encompassing approximately 115,000 acres (470 km²) of the Pinelands northeast of Hammonton. Its protected acreage is divided between Burlington, Camden, and Atlantic counties. The entire forest is located within Atlantic coastal pine barrens ecoregion as well as the New Jersey Pinelands National Reserve. The forest is located in the forested watershed of the Mullica River, which drains the central Pinelands region into the Great Bay.