Barangay San Miliano

Barangay San Miliano forms part of San Emilio, a municipality in Ilocos Sur, and is classified as a small barangay.

According to the 2020 Census of Population and Housing conducted by the Philippine Statistics Authority, Barangay San Miliano had a population of 676. This made it the 6th largest of 8 barangays in San Emilio by population, placing it in the middle tier of the municipality. Residents of Barangay San Miliano accounted for approximately 9.38% of the total population of San Emilio, which stood at 7,206 in the same census year.

The barangay recorded 670 residents in the 2015 intercensal count and 676 residents in the 2020 Census — a net change of +0.9%, consistent with a slowly expanding settlement. The Philippine Statistics Authority classifies Barangay San Miliano 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 San Miliano, 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 San Miliano ranks 444th 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.