Barangay Santa Ana

Barangay Santa Ana forms part of Agoo, a municipality in La Union, and is classified as a mid-sized barangay.

According to the 2020 Philippine census, Barangay Santa Ana had a population of 2,089. This made it the 9th largest of 49 barangays in Agoo by population, placing it in the upper half of the municipality. Residents of Barangay Santa Ana accounted for approximately 3.16% 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 Ana moving from 1,936 residents to 2,089 residents, an intercensal change of +7.9%. The trajectory indicates a growing community. Barangay Santa Ana is officially classified 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 Ana, 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 Ana ranks 93rd 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.