Barangay Munlawin Sur

Classified as a small barangay, Barangay Munlawin Sur is one of the administrative divisions of Alitagtag in Batangas, CALABARZON, Philippines.

According to the 2020 Census of Population and Housing conducted by the Philippine Statistics Authority, Barangay Munlawin Sur had a population of 785. This made it the 17th largest of 19 barangays in Alitagtag by population, placing it among the smaller barangays of the municipality. Residents of Barangay Munlawin Sur accounted for approximately 2.93% of the total population of Alitagtag, which stood at 26,819 in the same census year.

The barangay recorded 659 residents in the 2015 intercensal count and 785 residents in the 2020 Census — a net change of +19.1%, consistent with a growing settlement. The Philippine Statistics Authority classifies Barangay Munlawin Sur as rural, a designation applied to barangays with lower population density and predominantly non-built-up land use.

Alitagtag is a municipality comprising 19 barangays, and serves as the governing unit directly responsible for local services in Barangay Munlawin Sur, including public health, sanitation, peace and order, and civil registration. Within the wider province of Batangas, which contains 1,078 barangays across its component cities and municipalities, Barangay Munlawin Sur ranks 937th by 2020 population. Batangas 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.