Barangay Banbanaba

Barangay Banbanaba forms part of Santa Lucia, a municipality in Ilocos Sur, and is classified as a very small barangay.

According to the 2020 Census of Population and Housing conducted by the Philippine Statistics Authority, Barangay Banbanaba had a population of 492. This made it the 26th largest of 36 barangays in Santa Lucia by population, placing it in the middle tier of the municipality. Residents of Barangay Banbanaba accounted for approximately 1.89% of the total population of Santa Lucia, which stood at 25,966 in the same census year.

Between the 2015 and 2020 censuses, the population of Barangay Banbanaba changed from 490 to 492, a shift of +0.4% over the five-year period. This places the barangay among those with slowly expanding populations in Santa Lucia. The Philippine Statistics Authority classifies Barangay Banbanaba as rural, a designation applied to barangays with lower population density and predominantly non-built-up land use.

Santa Lucia is a municipality comprising 36 barangays, and serves as the governing unit directly responsible for local services in Barangay Banbanaba, including public health, sanitation, peace and order, and civil registration. Within the wider province of Ilocos Sur, which contains 768 barangays across its component cities and municipalities, Barangay Banbanaba ranks 585th by 2020 population. Ilocos Sur 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.