Barangay Nalsian Sur

Situated in Bayambang, Pangasinan, Barangay Nalsian Sur is one of 77 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 Nalsian Sur had a population of 1,636. This made it the 32nd largest of 77 barangays in Bayambang by population, placing it in the middle tier of the municipality. Residents of Barangay Nalsian Sur accounted for approximately 1.27% of the total population of Bayambang, which stood at 129,011 in the same census year.

Census comparisons between 2015 and 2020 show Barangay Nalsian Sur moving from 1,497 residents to 1,636 residents, an intercensal change of +9.3%. The trajectory indicates a growing community. The Philippine Statistics Authority classifies Barangay Nalsian Sur as rural, a designation applied to barangays with lower population density and predominantly non-built-up land use.

Bayambang is a municipality comprising 77 barangays, and serves as the governing unit directly responsible for local services in Barangay Nalsian 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 Nalsian Sur ranks 816th 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.

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.