Barangay San Carlos

Barangay San Carlos is a mid-sized barangay in the municipality of Rosario, located in the province of Batangas, in the CALABARZON region of the Philippines.

According to the 2020 Philippine census, Barangay San Carlos had a population of 3,799. This made it the 11th largest of 48 barangays in Rosario by population, placing it in the upper half of the municipality. Residents of Barangay San Carlos accounted for approximately 2.96% of the total population of Rosario, which stood at 128,352 in the same census year.

Census comparisons between 2015 and 2020 show Barangay San Carlos moving from 3,771 residents to 3,799 residents, an intercensal change of +0.7%. The trajectory indicates a slowly expanding community. Barangay San Carlos is officially classified as urban, reflecting the density and built-up character of the area.

Rosario is a municipality comprising 48 barangays, and serves as the governing unit directly responsible for local services in Barangay San Carlos, 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 Carlos ranks 194th 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.

Barangay San Carlos 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.