Iki Island (壱岐島, Iki-no-shima), or the Iki Archipelago (壱岐諸島, Iki-shotō) is an archipelago in the Tsushima Strait, which is administered as the city of Iki in Nagasaki Prefecture, Japan. The islands have a total area of 138.46 square kilometres (53.46 sq mi) with a total population of 28,008. Only four of the 23 named islands are permanently inhabited.