Barangay Llavac

Classified as a small barangay, Barangay Llavac is one of the administrative divisions of Siniloan in Laguna, CALABARZON, Philippines.

According to the 2020 Census of Population and Housing conducted by the Philippine Statistics Authority, Barangay Llavac had a population of 1,428. This made it the 10th largest of 20 barangays in Siniloan by population, placing it in the middle tier of the municipality. Residents of Barangay Llavac accounted for approximately 3.62% of the total population of Siniloan, which stood at 39,460 in the same census year.

Census comparisons between 2015 and 2020 show Barangay Llavac moving from 1,774 residents to 1,428 residents, an intercensal change of -19.5%. The trajectory indicates a contracting community. The Philippine Statistics Authority classifies Barangay Llavac as rural, a designation applied to barangays with lower population density and predominantly non-built-up land use.

Siniloan is a municipality comprising 20 barangays, and serves as the governing unit directly responsible for local services in Barangay Llavac, including public health, sanitation, peace and order, and civil registration. Within the wider province of Laguna, which contains 681 barangays across its component cities and municipalities, Barangay Llavac ranks 419th by 2020 population. Laguna is classified as a 1st by the Bureau of Local Government Finance, a category that reflects the province's annual regular income.

Barangay Llavac 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.