Jarvis Island (/ˈdʒɑrvɨs/; formerly known as Bunker Island) is an uninhabited 1 ³⁄₄-square-mile (4.5 km²) coral island located in the South Pacific Ocean at (0°22′S160°01′W), about halfway between Hawaii and the Cook Islands. It is an unincorporated, unorganized territory of the United States, administered by the United States Fish and Wildlife Service of the United States Department of the Interior as part of the National Wildlife Refuge system.