Barangay Santiago

Situated in Marcos, Ilocos Norte, Barangay Santiago is one of 13 barangays that make up the municipality within Ilocos Region.

According to the 2020 Philippine census, Barangay Santiago had a population of 1,510. This made it the 6th largest of 13 barangays in Marcos by population, placing it in the middle tier of the municipality. Residents of Barangay Santiago accounted for approximately 8.38% of the total population of Marcos, which stood at 18,010 in the same census year.

Census comparisons between 2015 and 2020 show Barangay Santiago moving from 1,410 residents to 1,510 residents, an intercensal change of +7.1%. The trajectory indicates a growing community. Barangay Santiago is officially classified as rural, a designation applied to barangays with lower population density and predominantly non-built-up land use.

Marcos is a municipality comprising 13 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 Ilocos Norte, which contains 559 barangays across its component cities and municipalities, Barangay Santiago ranks 101st by 2020 population. Ilocos Norte is classified as a 1st by the Bureau of Local Government Finance, a category that reflects the province's annual regular income.

Barangay Santiago 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.