The Egmont Islands or Egmont Atoll, also known as Six Iles, is an uninhabited atoll administered by the United Kingdom. They are one of the few emerged coral atolls that make up the Chagos Archipelago, British Indian Ocean Territory. This small atoll lies less than 10 km south of the southwestern rim of the Great Chagos Bank submerged coral reef. The nearest island is Danger Island on the Great Chagos Bank, less than 30 km due north. Its total size is 29 km², including the lagoon and the fringing coral reef. The land area totals about 4 km².