Tobi, or Hatohobei (Tobian), is the southernmost of Palau's sixteen states, consisting of Tobi Island and Helen Reef. The total land area is about 0.88 km². The population was 25 in 2015. Tobian, English, and Sonsorolese are the official languages of Hatohobei State.

Sonsorol is one of the sixteen states of Palau. The inhabitants speak Sonsorolese, a local Chuukic language, and Palauan.