Barangay Santo Rosario

Barangay Santo Rosario is a mid-sized barangay in the municipality of Masinloc, located in the province of Zambales, in the Central Luzon region of the Philippines.

According to the 2020 Philippine census, Barangay Santo Rosario had a population of 2,307. This made it the 12th largest of 13 barangays in Masinloc by population, placing it among the smaller barangays of the municipality. Residents of Barangay Santo Rosario accounted for approximately 4.23% of the total population of Masinloc, which stood at 54,529 in the same census year.

Census comparisons between 2015 and 2020 show Barangay Santo Rosario moving from 2,102 residents to 2,307 residents, an intercensal change of +9.8%. The trajectory indicates a growing community. Barangay Santo Rosario is officially classified as rural, a designation applied to barangays with lower population density and predominantly non-built-up land use.

Masinloc is a municipality comprising 13 barangays, and serves as the governing unit directly responsible for local services in Barangay Santo Rosario, including public health, sanitation, peace and order, and civil registration. Within the wider province of Zambales, which contains 247 barangays across its component cities and municipalities, Barangay Santo Rosario ranks 97th by 2020 population. Zambales is classified as a 2nd by the Bureau of Local Government Finance, a category that reflects the province's annual regular income.

Like every Philippine barangay, Barangay Santo Rosario 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.