Barangay Lamian

Barangay Lamian forms part of Surallah, a municipality in South Cotabato, and is classified as a mid-sized barangay.

According to the 2020 Census of Population and Housing conducted by the Philippine Statistics Authority, Barangay Lamian had a population of 4,429. This made it the 8th largest of 17 barangays in Surallah by population, placing it in the middle tier of the municipality. Residents of Barangay Lamian accounted for approximately 4.96% of the total population of Surallah, which stood at 89,340 in the same census year.

Between the 2015 and 2020 censuses, the population of Barangay Lamian changed from 5,003 to 4,429, a shift of -11.5% over the five-year period. This places the barangay among those with contracting populations in Surallah. The Philippine Statistics Authority classifies Barangay Lamian as rural, a designation applied to barangays with lower population density and predominantly non-built-up land use.

Surallah is a municipality comprising 17 barangays, and serves as the governing unit directly responsible for local services in Barangay Lamian, including public health, sanitation, peace and order, and civil registration. Within the wider province of South Cotabato, which contains 225 barangays across its component cities and municipalities, Barangay Lamian ranks 69th by 2020 population. South Cotabato is classified as a 1st by the Bureau of Local Government Finance, a category that reflects the province's annual regular income.

Barangay Lamian 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.