Barangay Decabacan

Situated in Diadi, Nueva Vizcaya, Barangay Decabacan is one of 19 barangays that make up the municipality within Cagayan Valley.

According to the 2020 Philippine census, Barangay Decabacan had a population of 774. This made it the 12th largest of 19 barangays in Diadi by population, placing it in the middle tier of the municipality. Residents of Barangay Decabacan accounted for approximately 4.02% of the total population of Diadi, which stood at 19,236 in the same census year.

Census comparisons between 2015 and 2020 show Barangay Decabacan moving from 703 residents to 774 residents, an intercensal change of +10.1%. The trajectory indicates a growing community. Barangay Decabacan is officially classified as rural, a designation applied to barangays with lower population density and predominantly non-built-up land use.

Diadi is a municipality comprising 19 barangays, and serves as the governing unit directly responsible for local services in Barangay Decabacan, including public health, sanitation, peace and order, and civil registration. Within the wider province of Nueva Vizcaya, which contains 275 barangays across its component cities and municipalities, Barangay Decabacan ranks 232nd by 2020 population. Nueva Vizcaya is classified as a 2nd 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.