Barangay San Macario Sur

Situated in Natividad, Pangasinan, Barangay San Macario Sur is one of 18 barangays that make up the municipality within Ilocos Region.

According to the 2020 Census of Population and Housing conducted by the Philippine Statistics Authority, Barangay San Macario Sur had a population of 1,305. This made it the 13th largest of 18 barangays in Natividad by population, placing it in the middle tier of the municipality. Residents of Barangay San Macario Sur accounted for approximately 5.06% of the total population of Natividad, which stood at 25,771 in the same census year.

Between the 2015 and 2020 censuses, the population of Barangay San Macario Sur changed from 1,135 to 1,305, a shift of +15.0% over the five-year period. This places the barangay among those with growing populations in Natividad. The Philippine Statistics Authority classifies Barangay San Macario Sur as rural, a designation applied to barangays with lower population density and predominantly non-built-up land use.

Natividad is a municipality comprising 18 barangays, and serves as the governing unit directly responsible for local services in Barangay San Macario Sur, including public health, sanitation, peace and order, and civil registration. Within the wider province of Pangasinan, which contains 1,364 barangays across its component cities and municipalities, Barangay San Macario Sur ranks 997th by 2020 population. Pangasinan is classified as a 1st by the Bureau of Local Government Finance, a category that reflects the province's annual regular income.

Barangay San Macario Sur 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.