Barangay Sanja

Barangay Sanja forms part of Aparri, 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 Sanja had a population of 1,778. This made it the 16th largest of 42 barangays in Aparri by population, placing it in the middle tier of the municipality. Residents of Barangay Sanja accounted for approximately 2.58% of the total population of Aparri, which stood at 68,839 in the same census year.

Census comparisons between 2015 and 2020 show Barangay Sanja moving from 1,620 residents to 1,778 residents, an intercensal change of +9.8%. The trajectory indicates a growing community. The Philippine Statistics Authority classifies Barangay Sanja as rural, a designation applied to barangays with lower population density and predominantly non-built-up land use.

Aparri is a municipality comprising 42 barangays, and serves as the governing unit directly responsible for local services in Barangay Sanja, 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 Sanja ranks 244th 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.