Barangay Langaoan

Barangay Langaoan 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 Langaoan had a population of 653. This made it the 22nd largest of 33 barangays in Santa Maria by population, placing it in the middle tier of the municipality. Residents of Barangay Langaoan accounted for approximately 2.18% of the total population of Santa Maria, which stood at 30,006 in the same census year.

Census comparisons between 2015 and 2020 show Barangay Langaoan moving from 678 residents to 653 residents, an intercensal change of -3.7%. The trajectory indicates a contracting community. The Philippine Statistics Authority classifies Barangay Langaoan 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 Langaoan, 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 Langaoan ranks 465th 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 Langaoan 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.