Isabela, officially known as the City of Isabela (Chavacano: Ciudad de Isabela; Tausūg: Dāira sin Isabela; Yakan: Suidad Isabelahin; Tagalog: Lungsod ng Isabela), is a 4th class component city and de facto capital of the province of Basilan, Philippines.According to the 2020 census, it has a population of 130,379 people. It is also colloquially known as Isabela de Basilan to differentiate ...