Barangay San Carlos

Barangay San Carlos forms part of Gattaran, a municipality in Cagayan, and is classified as a small barangay.

According to the 2020 Census of Population and Housing conducted by the Philippine Statistics Authority, Barangay San Carlos had a population of 1,027. This made it the 26th largest of 50 barangays in Gattaran by population, placing it in the middle tier of the municipality. Residents of Barangay San Carlos accounted for approximately 1.74% of the total population of Gattaran, which stood at 58,874 in the same census year.

Census comparisons between 2015 and 2020 show Barangay San Carlos moving from 966 residents to 1,027 residents, an intercensal change of +6.3%. The trajectory indicates a growing community. The Philippine Statistics Authority classifies Barangay San Carlos as rural, a designation applied to barangays with lower population density and predominantly non-built-up land use.

Gattaran is a municipality comprising 50 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 Cagayan, which contains 820 barangays across its component cities and municipalities, Barangay San Carlos ranks 499th by 2020 population. Cagayan is classified as a 1st by the Bureau of Local Government Finance, a category that reflects the province's annual regular income.

The barangay's legislative and executive affairs are handled by a Punong Barangay and the Sangguniang Barangay, elected nationwide during the Barangay and SK Elections. The next BSKE is scheduled for Monday, November 2, 2026, following the synchronized election schedule set by COMELEC Resolution No. 11191.