Barangay Lancuas

Situated in San Emilio, Ilocos Sur, Barangay Lancuas is one of 8 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 Lancuas had a population of 932. This made it the 4th largest of 8 barangays in San Emilio by population, placing it in the middle tier of the municipality. Residents of Barangay Lancuas accounted for approximately 12.93% of the total population of San Emilio, which stood at 7,206 in the same census year.

Census comparisons between 2015 and 2020 show Barangay Lancuas moving from 889 residents to 932 residents, an intercensal change of +4.8%. The trajectory indicates a growing community. The Philippine Statistics Authority classifies Barangay Lancuas as rural, a designation applied to barangays with lower population density and predominantly non-built-up land use.

San Emilio is a municipality comprising 8 barangays, and serves as the governing unit directly responsible for local services in Barangay Lancuas, including public health, sanitation, peace and order, and civil registration. Within the wider province of Ilocos Sur, which contains 768 barangays across its component cities and municipalities, Barangay Lancuas ranks 296th by 2020 population. Ilocos Sur 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.