Palau (/pəˈlaʊ/, sometimes spelled Belau or Pelew), officially the Republic of Palau (Palauan: Beluu er a Belau), is an island country located in the western Pacific Ocean. It is geographically part of the larger island group of Micronesia. The country's population of around 21,000 is spread across 250 islands forming the western chain of the Caroline Islands. The most populous island is Koror. The islands share maritime boundaries with Indonesia, the Philippines, and the Federated States of Micronesia. The capital Ngerulmud is located in Melekeok State on the nearby island of Babeldaob.