The Rock Island State Park is a state park and recreation area in Rock Island, Tennessee. The site is centered around a peninsula that is created by the confluence of the Collins River and the Caney Fork River.

Featuring 883 acres of area, the Rock Island State Park is known for its stunning overlooks and waterfalls. The site is also rich with things to see with its natural sand beach, deep pools, and a dam just to name a few. There are also some historic areas in the site, like the Great Falls Cotton Mill, also known as the Falls City Cotton Mill, and the Spring castle.

Visitors of the Rock Island State Park can enjoy hiking, camping, fishing, picnicking, boating, and swimming (although there are no lifeguards on duty). The park is also outfitted with several athletic fields, playgrounds, board games, and horseshoeing equipment.