Barangay Santo Domingo

Classified as a small barangay, Barangay Santo Domingo is one of the administrative divisions of Alicia in Isabela, Cagayan Valley, Philippines.

According to the 2020 Census of Population and Housing conducted by the Philippine Statistics Authority, Barangay Santo Domingo had a population of 1,541. This made it the 23rd largest of 34 barangays in Alicia by population, placing it in the middle tier of the municipality. Residents of Barangay Santo Domingo accounted for approximately 2.09% of the total population of Alicia, which stood at 73,874 in the same census year.

Between the 2015 and 2020 censuses, the population of Barangay Santo Domingo changed from 1,589 to 1,541, a shift of -3.0% over the five-year period. This places the barangay among those with contracting populations in Alicia. The Philippine Statistics Authority classifies Barangay Santo Domingo as rural, a designation applied to barangays with lower population density and predominantly non-built-up land use.

Alicia is a municipality comprising 34 barangays, and serves as the governing unit directly responsible for local services in Barangay Santo Domingo, 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 Santo Domingo ranks 409th 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.

Barangay Santo Domingo is governed by an elected Sangguniang Barangay composed of a Punong Barangay and seven kagawads, with the Sangguniang Kabataan representing the youth. The next BSKE, set for Monday, November 2, 2026, will elect officials to four-year terms as provided under Republic Act No. 12232.