Barangay Baluk-baluk

Situated in San Nicolas, Batangas, Barangay Baluk-baluk is one of 18 barangays that make up the municipality within CALABARZON.

According to the 2020 Philippine census, Barangay Baluk-baluk had a population of 879. This made it the 11th largest of 18 barangays in San Nicolas by population, placing it in the middle tier of the municipality. Residents of Barangay Baluk-baluk accounted for approximately 3.68% of the total population of San Nicolas, which stood at 23,908 in the same census year.

Census comparisons between 2015 and 2020 show Barangay Baluk-baluk moving from 916 residents to 879 residents, an intercensal change of -4.0%. The trajectory indicates a contracting community. Barangay Baluk-baluk is officially classified as rural, a designation applied to barangays with lower population density and predominantly non-built-up land use.

San Nicolas is a municipality comprising 18 barangays, and serves as the governing unit directly responsible for local services in Barangay Baluk-baluk, 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 Baluk-baluk ranks 908th 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.

Barangay Baluk-baluk 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.