Isabela's demographic composition reads like a census of Basilan itself, compressed into a single city. Nearly 90 percent of the agriculturally productive land is owned by city residents. The Chinese community handles almost all trading activity and has a significant presence in the professions. Zamboanguenos work as professionals or city government employees. Tausug and Maranao residents are engaged in retail commerce, vending, and fishing. Bisaya settlers run micro-enterprises and rural farms. Yakan residents deal in copra and trade, or work for the provincial government. This ethnic division of labor is understood by everyone and contested by no one, at least openly. The city operates through a kind of negotiated coexistence that depends on each group maintaining its role.

Isabela's economy anchors itself to rubber. The barangays of Baluno and Menzi operate their own rubber processing plants, converting raw sap into crumb rubber for export. The city's official One Town One Product designation is crumb rubber, a recognition of the processing plants clustered within city limits. B.F. Goodrich and Sime Darby Tires represent the major international investments that have survived in the area. Beyond rubber, the economy rests on coconut and copra production, supplemented by bamboo crafts and furniture making. The Basilan Chamber of Commerce and Industry, established in 1975, represents the business sector, though Isabela's commerce has always operated as much through informal networks as through formal institutions.

Security is not an abstraction in Isabela. The city hosted the Balikatan 02-1 military exercises in 2002, a joint operation between Philippine and American armed forces that brought international attention to Basilan's insurgency. The exercises returned in 2005. Three army units maintain permanent presence: the 15th Special Forces Airborne Company in Barangay Tabuk, the Special Operation Task Force Basilan in Barangay Tabiawan, and the 4th Special Forces Battalion in Barangay Cabunbata. The Philippine National Police maintains its Basilan Provincial Office in Menzi Barangay. Alongside the military infrastructure sits the ordinary apparatus of civic life: the Juan S. Alano Memorial Hospital, the first private hospital on the island, plus government and community hospitals, health centers in nearly every barangay, and pharmacies scattered across the poblacion.

Isabela's educational landscape mirrors its religious diversity. Basilan State College in Barangay Sumagdang offers the widest range of courses. Basilan National High School serves as the premier secondary institution. Claret College, formerly Fatima School, is the only Catholic-run sectarian school in the city. Computer Technologies Institute offers information technology programs. Juan S. Alano Memorial School provides midwifery and health science courses. Sunday schools serve Christian children. Madaris serve Muslim learners. The parallel systems reflect a city where coexistence means not merging but maintaining separate structures side by side. Jack and Jill Integrated School and Hansel and Gretel International School handle the youngest students, their fairy-tale names a curious counterpoint to a city that has known real danger.