The Fond du Lac State Forest is a state forest in Minnesota, USA, principally managed by the Minnesota Department of Natural Resources (MDNR). The main segment of the forest is located between the towns of Sawyer and Cromwell, in Carlton County. The boundaries of the forest overlap with those of the Fond du Lac Indian Reservation, some state forest land falls within the reservation. The Kettle Lake Wildlife Management Area (also managed by the MDNR) is located in the southern half of the main segment.