Barangay Lomboy

Situated in Santo Tomas, La Union, Barangay Lomboy is one of 24 barangays that make up the municipality within Ilocos Region.

According to the 2020 Philippine census, Barangay Lomboy had a population of 1,537. This made it the 16th largest of 24 barangays in Santo Tomas by population, placing it in the middle tier of the municipality. Residents of Barangay Lomboy accounted for approximately 3.76% of the total population of Santo Tomas, which stood at 40,846 in the same census year.

Census comparisons between 2015 and 2020 show Barangay Lomboy moving from 1,350 residents to 1,537 residents, an intercensal change of +13.9%. The trajectory indicates a growing community. Barangay Lomboy is officially classified as rural, a designation applied to barangays with lower population density and predominantly non-built-up land use.

Santo Tomas is a municipality comprising 24 barangays, and serves as the governing unit directly responsible for local services in Barangay Lomboy, 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 Lomboy ranks 185th 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.