Siau Island, Sitaro Islands Regency, North Sulawesi, Indonesia
Siau is an island in North Sulawesi, Indonesia, located in the Sangir Archipelago approximately 130 km off the northern tip of Sulawesi in the Celebes Sea. It is the main island of the Sitaro Islands Regency of North Sulawesi Province. The northern part of the island forms the volcano known as Karangetang, which is one of Indonesia's most active volcanoes. The population of Siau island was 40,758 at the 2010 Census. The island has recently been noted as the home of the Siau Island tarsier.
Location of Siau Island