Bunyu Island

Bunyu Island is an inhabited coastal island in Bunyu District, Bulungan Regency, North Kalimantan, Indonesia, located off the northeastern coast of Borneo at the mouth of the Sesayap River facing the Celebes Sea. The island is known for its long sandy beaches, mangrove fringes, fishing villages and long history of oil and coal production. It offers a quiet, rural island environment with natural coastal scenery and local community life.

Visitors to Bunyu Island can expect a quiet, rural island setting with long sandy beaches on the eastern coast, extensive mangrove forests along the shoreline and river mouths, and small fishing settlements. The interior is low-lying with former oil and coal mining areas, village roads, and modest local infrastructure. Exploration is mainly by foot or motorbike around villages, beaches and mangrove areas, with opportunities for sightseeing, photography and observing daily fishing and community life.

Bunyu Island has been known since the 1920s for petroleum exploration by Bataafsche Petroleum Maatschappij (BPM) during the Dutch colonial period. Oil fields and later coal mining shaped its development. During World War II the island was occupied and an airfield was developed. After independence, oil operations continued under Indonesian state enterprises, leaving historic industrial remains alongside fishing settlements.

The island is home to Tidung, Bugis, Banjar, Javanese and other communities whose livelihoods center on fishing, small-scale agriculture and mining-related work. Traditional fishing practices, stilt houses and local markets reflect coastal Borneo culture and community life.