Barangay Cabannungan 1st

Barangay Cabannungan 1st forms part of City of Ilagan, a city in Isabela, and is classified as a small barangay.

According to the 2020 Census of Population and Housing conducted by the Philippine Statistics Authority, Barangay Cabannungan 1st had a population of 956. This made it the 68th largest of 91 barangays in City of Ilagan by population, placing it among the smaller barangays of the city. Residents of Barangay Cabannungan 1st accounted for approximately 0.60% of the total population of City of Ilagan, which stood at 158,218 in the same census year.

Census comparisons between 2015 and 2020 show Barangay Cabannungan 1st moving from 756 residents to 956 residents, an intercensal change of +26.5%. The trajectory indicates a growing community. The Philippine Statistics Authority classifies Barangay Cabannungan 1st as rural, a designation applied to barangays with lower population density and predominantly non-built-up land use.

City of Ilagan is a city comprising 91 barangays, and serves as the governing unit directly responsible for local services in Barangay Cabannungan 1st, including public health, sanitation, peace and order, and civil registration. Within the wider province of Isabela, which contains 1,055 barangays across its component cities and municipalities, Barangay Cabannungan 1st ranks 674th by 2020 population. Isabela is classified as a 1st by the Bureau of Local Government Finance, a category that reflects the province's annual regular income.

The barangay's legislative and executive affairs are handled by a Punong Barangay and the Sangguniang Barangay, elected nationwide during the Barangay and SK Elections. The next BSKE is scheduled for Monday, November 2, 2026, following the synchronized election schedule set by COMELEC Resolution No. 11191.