Barangay San Juan

Situated in Mabini, Batangas, Barangay San Juan is one of 34 barangays that make up the municipality within CALABARZON.

According to the 2020 Philippine census, Barangay San Juan had a population of 1,935. This made it the 10th largest of 34 barangays in Mabini by population, placing it in the upper half of the municipality. Residents of Barangay San Juan accounted for approximately 3.80% of the total population of Mabini, which stood at 50,858 in the same census year.

Census comparisons between 2015 and 2020 show Barangay San Juan moving from 2,124 residents to 1,935 residents, an intercensal change of -8.9%. The trajectory indicates a contracting community. Barangay San Juan is officially classified as rural, a designation applied to barangays with lower population density and predominantly non-built-up land use.

Mabini is a municipality comprising 34 barangays, and serves as the governing unit directly responsible for local services in Barangay San Juan, 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 San Juan ranks 564th 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.

Like every Philippine barangay, Barangay San Juan is led by an elected Punong Barangay (barangay captain) supported by seven Sangguniang Barangay members (kagawads), an SK Chairperson, a Barangay Secretary, and a Barangay Treasurer. The next Barangay and Sangguniang Kabataan Elections (BSKE) are scheduled for Monday, November 2, 2026, with officials serving four-year terms under Republic Act No. 12232.