Rocky Fork State Park is a public recreation area located in Highland County, Ohio, United States.

[4] The state park's central feature is 2,080-acre (840 ha) Rocky Fork Lake and its 31 miles (50 km) of shoreline.

[5] The lake was added to the state park system in 1950.

The park offers marinas, boat ramps, swimming beaches, picnic areas, hiking trails and nature center.

[4] Two significant archaeological sites dating from the Hopewellian period are located in the park, the Rocky Fork Park Group and the Rocky Fork Park Site.