The islands cover 750 square kilometres (290 sq mi) in area and support a population of 16,664 at the 2010 Census. The most significant town is Pati, on Moa. Industries include the cultivation of rice, coconut palms and tobacco, animal husbandry, and fishing.
Leti proper, the westernmost island, has a population of 7,526. The island is a triangular mountain ridge, subtended by Koli Besar mountain in the east and the Rapat mountains in the west.