Sonsorol is one of the sixteen states of Palau. The administrative center is Dongosaru on Sonsorol island. The inhabitants speak Sonsorolese, a local Trukic language, and Palauan.
The islands of the state of Sonsorol, together with the islands of Hatohobei, form the Southwest Islands of Palau.
The state is subdivided into four municipalities, which correspond to the four individual islands, with one village on each island, with the possible exception of Fanna Island. The islands are, from north to south (Fanna Island and Sonsorol Island are together called Sonsorol Islands).