Barangay Santiago

Barangay Santiago forms part of Benito Soliven, a municipality in Isabela, and is classified as a very small barangay.

According to the 2020 Census of Population and Housing conducted by the Philippine Statistics Authority, Barangay Santiago had a population of 418. This made it the 26th largest of 29 barangays in Benito Soliven by population, placing it among the smaller barangays of the municipality. Residents of Barangay Santiago accounted for approximately 1.40% of the total population of Benito Soliven, which stood at 29,752 in the same census year.

Between the 2015 and 2020 censuses, the population of Barangay Santiago changed from 412 to 418, a shift of +1.5% over the five-year period. This places the barangay among those with slowly expanding populations in Benito Soliven. The Philippine Statistics Authority classifies Barangay Santiago as rural, a designation applied to barangays with lower population density and predominantly non-built-up land use.

Benito Soliven is a municipality comprising 29 barangays, and serves as the governing unit directly responsible for local services in Barangay Santiago, 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 Santiago ranks 985th 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.