Barangay San Martin

Situated in Maddela, Quirino, Barangay San Martin is one of 32 barangays that make up the municipality within Cagayan Valley.

According to the 2020 Census of Population and Housing conducted by the Philippine Statistics Authority, Barangay San Martin had a population of 1,082. This made it the 16th largest of 32 barangays in Maddela by population, placing it in the middle tier of the municipality. Residents of Barangay San Martin accounted for approximately 2.64% of the total population of Maddela, which stood at 40,943 in the same census year.

Census comparisons between 2015 and 2020 show Barangay San Martin moving from 1,084 residents to 1,082 residents, an intercensal change of -0.2%. The trajectory indicates a broadly stable community. The Philippine Statistics Authority classifies Barangay San Martin as rural, a designation applied to barangays with lower population density and predominantly non-built-up land use.

Maddela is a municipality comprising 32 barangays, and serves as the governing unit directly responsible for local services in Barangay San Martin, including public health, sanitation, peace and order, and civil registration. Within the wider province of Quirino, which contains 132 barangays across its component cities and municipalities, Barangay San Martin ranks 78th by 2020 population. Quirino is classified as a 3rd by the Bureau of Local Government Finance, a category that reflects the province's annual regular income.

Barangay San Martin 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.