Barangay Santa Maria

Classified as a small barangay, Barangay Santa Maria is one of the administrative divisions of Agoo in La Union, Ilocos Region, Philippines.

According to the 2020 Census of Population and Housing conducted by the Philippine Statistics Authority, Barangay Santa Maria had a population of 978. This made it the 33rd largest of 49 barangays in Agoo by population, placing it in the middle tier of the municipality. Residents of Barangay Santa Maria accounted for approximately 1.48% of the total population of Agoo, which stood at 66,028 in the same census year.

Census comparisons between 2015 and 2020 show Barangay Santa Maria moving from 971 residents to 978 residents, an intercensal change of +0.7%. The trajectory indicates a slowly expanding community. The Philippine Statistics Authority classifies Barangay Santa Maria as rural, a designation applied to barangays with lower population density and predominantly non-built-up land use.

Agoo is a municipality comprising 49 barangays, and serves as the governing unit directly responsible for local services in Barangay Santa Maria, including public health, sanitation, peace and order, and civil registration. Within the wider province of La Union, which contains 576 barangays across its component cities and municipalities, Barangay Santa Maria ranks 367th by 2020 population. La Union 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.