Barangay Rosario

Situated in Pinamalayan, Oriental Mindoro, Barangay Rosario is one of 37 barangays that make up the municipality within MIMAROPA Region.

According to the 2020 Census of Population and Housing conducted by the Philippine Statistics Authority, Barangay Rosario had a population of 1,735. This made it the 25th largest of 37 barangays in Pinamalayan by population, placing it in the middle tier of the municipality. Residents of Barangay Rosario accounted for approximately 1.92% of the total population of Pinamalayan, which stood at 90,383 in the same census year.

The barangay recorded 1,778 residents in the 2015 intercensal count and 1,735 residents in the 2020 Census — a net change of -2.4%, consistent with a contracting settlement. The Philippine Statistics Authority classifies Barangay Rosario as rural, a designation applied to barangays with lower population density and predominantly non-built-up land use.

Pinamalayan is a municipality comprising 37 barangays, and serves as the governing unit directly responsible for local services in Barangay Rosario, including public health, sanitation, peace and order, and civil registration. Within the wider province of Oriental Mindoro, which contains 426 barangays across its component cities and municipalities, Barangay Rosario ranks 214th by 2020 population. Oriental Mindoro 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 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.