Atsion Lake is a man-made lake in Wharton State Forest in the Pine Barrens, in the community of Atsion, Burlington County, New Jersey. The lake is part of the Mullica River. The lake offers boating, hiking, fishing, swimming and camping facilities, and cross-country skiing in the winter.

Entrance fees are only charged from Memorial Day weekend to Labor Day. $5 weekdays and $10 weekends. Launching fees are charged on the Mullica River beginning on Memorial Day weekend and ending on Labor Day inclusive.