Cossatot River State Park-Natural Area is a 5383 acre state park and designated natural area located in Howard County, Arkansas. The park is managed jointly by the Arkansas Department of Parks and Tourism and the Arkansas Natural Heritage Commission.

The park lies along 11 miles of the Cossatot River which features Class III, IV, and dangerous Class V rapids making it one of the more challenging float rivers in the central United States. The park is a popular destination for skilled canoeists and kayakers.

The park shares a border with the Ouachita National Forest and consists of a rugged rocky canyon with old growth hardwoods and cedar glades. The river, including the park, has been designated as a National Wild and Scenic River by Congress.

Cossatot is considered a primitive area and thus no camping or facilities are provided within the park but are available at nearby sites.

Much of the park was acquired with the assistance of the Weyerhauser Corporation.