Rock Island is an unincorporated town in the northeastern-most portion of Warren County, Tennessee, United States. The town is named after an island on the Caney Fork just below the confluence of the Rocky River. Rock Island is home to the Great Falls Dam and Rock Island State Park.
Many different houses, restaurants, and marinas can be found here. Rock Island is a popular destination during the summer season. It is known for scenic waterfalls and bluffs. Boats can often be seen on the river riding by. The state park offers many different hiking trails as well as a sand bar (almost a beach front).