Barangay San Lucas

Classified as a mid-sized barangay, Barangay San Lucas is one of the administrative divisions of Barotac Viejo in Iloilo, Western Visayas, Philippines.

According to the 2020 Philippine census, Barangay San Lucas had a population of 4,511. This made it the 2nd largest of 26 barangays in Barotac Viejo by population, placing it among the most populous barangays of the municipality. Residents of Barangay San Lucas accounted for approximately 9.28% of the total population of Barotac Viejo, which stood at 48,614 in the same census year.

Census comparisons between 2015 and 2020 show Barangay San Lucas moving from 4,519 residents to 4,511 residents, an intercensal change of -0.2%. The trajectory indicates a broadly stable community. Barangay San Lucas is officially classified as rural, a designation applied to barangays with lower population density and predominantly non-built-up land use.

Barotac Viejo is a municipality comprising 26 barangays, and serves as the governing unit directly responsible for local services in Barangay San Lucas, including public health, sanitation, peace and order, and civil registration. Within the wider province of Iloilo, which contains 1,901 barangays across its component cities and municipalities, Barangay San Lucas ranks 26th by 2020 population. Iloilo 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.