Cocos Island is an island 1 mile (1.6 km) off the southern tip of the United States territory of Guam, located within the Merizo Barrier Reef, part of the municipality of Malesso'. The island is uninhabited, 1,600 meters (5,200 ft) long in a southwest–northeast direction, between 200 m (660 ft) and 300 m (980 ft) wide, and has an area of 386,303 m2. It sits atop the southwestern coral reef rim of Cocos Lagoon.