Barangay San Lorenzo

Situated in Rosario, Northern Samar, Barangay San Lorenzo is one of 11 barangays that make up the municipality within Eastern Visayas.

According to the 2020 Philippine census, Barangay San Lorenzo had a population of 1,425. This made it the 3rd largest of 11 barangays in Rosario by population, placing it in the upper half of the municipality. Residents of Barangay San Lorenzo accounted for approximately 13.01% of the total population of Rosario, which stood at 10,949 in the same census year.

Census comparisons between 2015 and 2020 show Barangay San Lorenzo moving from 1,251 residents to 1,425 residents, an intercensal change of +13.9%. The trajectory indicates a growing community. Barangay San Lorenzo is officially classified as rural, a designation applied to barangays with lower population density and predominantly non-built-up land use.

Rosario is a municipality comprising 11 barangays, and serves as the governing unit directly responsible for local services in Barangay San Lorenzo, including public health, sanitation, peace and order, and civil registration. Within the wider province of Northern Samar, which contains 569 barangays across its component cities and municipalities, Barangay San Lorenzo ranks 142nd by 2020 population. Northern Samar is classified as a 2nd by the Bureau of Local Government Finance, a category that reflects the province's annual regular income.

Barangay San Lorenzo 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.