Barangay San Juan

Barangay San Juan forms part of Mandaon, a municipality in Masbate, and is classified as a small barangay.

According to the 2020 Philippine census, Barangay San Juan had a population of 1,034. This made it the 17th largest of 26 barangays in Mandaon by population, placing it in the middle tier of the municipality. Residents of Barangay San Juan accounted for approximately 2.34% of the total population of Mandaon, which stood at 44,122 in the same census year.

Census comparisons between 2015 and 2020 show Barangay San Juan moving from 875 residents to 1,034 residents, an intercensal change of +18.2%. The trajectory indicates a growing 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.

Mandaon is a municipality comprising 26 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 Masbate, which contains 550 barangays across its component cities and municipalities, Barangay San Juan ranks 361st by 2020 population. Masbate 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.