Cossatot River State Park-Natural Area is a 5,299.65-acre Arkansas state park in Howard County and Polk County, Arkansas in the United States. The park follows a rough, undeveloped 12.5 miles of the Cossatot River. The river itself is included in Arkansas's Natural and Scenic Rivers System and the National Park Service's list of National Wild and Scenic Rivers, making it a whitewater rafting destination.