Basilan is an island province at the southern tip of the Zamboanga Peninsula, separated from Zamboanga City by a narrow strait. It is part of the Bangsamoro Autonomous Region in Muslim Mindanao (BARMM), and it is predominantly Muslim in population and character. The island is forested and agricultural, known for its rubber, its Yakan weaving, and the Chavacano-speaking city of Isabela.
Lamitan City, on the northeast coast, has been the provincial capital since 2017. Isabela City, the largest city and the capital from 1975 to 2017, is a component city of Basilan but is administered as part of the Zamboanga Peninsula Region. Its Chavacano-speaking population is mainly Christian; the rest of the island is mainly Muslim.
The Yakan are the indigenous Muslim people of Basilan, distinct from the Tausug of Sulu and the Maguindanao of the mainland. They are known for geometric woven cloth — intricate patterns in primary colors on cotton fabric — that is among the most technically demanding textile work in the Philippines.
Basilan's economy rests on rubber, coconut, and abaca cultivation. The island is one of the Philippines' main rubber-producing areas, with large plantation estates established during the American period. The forests have been significantly reduced by agricultural conversion over the past century.
The 2024 census counted 693,244 people on Basilan: 541,947 in the province under BARMM and 151,297 in Isabela City. The Yakan, Tausug and Chavacano are the three main groups; the Yakan and Tausug are mainly Muslim, and the Chavacano mainly Christian.




