Barangay Tinaan

Barangay Tinaan forms part of Santa Maria, a municipality in Ilocos Sur, and is classified as a small barangay.

According to the 2020 Census of Population and Housing conducted by the Philippine Statistics Authority, Barangay Tinaan had a population of 937. This made it the 12th largest of 33 barangays in Santa Maria by population, placing it in the middle tier of the municipality. Residents of Barangay Tinaan accounted for approximately 3.12% of the total population of Santa Maria, which stood at 30,006 in the same census year.

Between the 2015 and 2020 censuses, the population of Barangay Tinaan changed from 1,035 to 937, a shift of -9.5% over the five-year period. This places the barangay among those with contracting populations in Santa Maria. The Philippine Statistics Authority classifies Barangay Tinaan as rural, a designation applied to barangays with lower population density and predominantly non-built-up land use.

Santa Maria is a municipality comprising 33 barangays, and serves as the governing unit directly responsible for local services in Barangay Tinaan, 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 Tinaan ranks 291st 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.

Barangay Tinaan 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.