Tobi Island, or Hatohobei (Tobian language), is the southernmost of Palau's sixteen states, consisting of Tobi Island and uninhabited Helen Reef. The total land area is about 0.88 km². The population was 80 in 1962, 51 in 1995, and 23 in 2000, showing a steady decline over time, but 44 in 2005, showing a population rebound.