Buckeye Lake State Park is a 3,349-acre (1,355 ha) Ohio state park near Millersport, in Fairfield, Licking and Perry counties, Ohio in the United States. The park is named for Buckeye Lake (originally Licking Summit Reservoir), which was built in the 19th century to supply water to the Ohio and Erie Canal.
The park, with headquarters at Liebs Island on the west side of Buckeye Lake, consists of a number of shore areas, islands, and water acreage. Shore areas and islands include Brooks Park, Fairfield Beach, Liebs Island, Mud Island and North Shore. Activities include boating, fishing, swimming, picnicking, wildlife observation and winter recreation. Fishing access is available at all locations. Boat ramps are located at Liebs Island, Fairfield Beach and North Shore. Docks are available for rental at Fairfield Beach. Boating opportunities are currently limited given low lake levels, a result of precautions associated with the state of the dam. Swimming beaches are located at Brooks Park, Crystal Beach (at North Shore) and Fairfield Beach. Swimming is currently prohibited at all areas, due to algae levels and to storage of dredged material at Brooks Park. Wildlife visible in or from the park include cormorants, herons, bald eagles, osprey, and numerous waterfowl.