Barangay Sinalugan

Barangay Sinalugan is a small barangay in the municipality of San Guillermo, located in the province of Isabela, in the Cagayan Valley region of the Philippines.

According to the 2020 Census of Population and Housing conducted by the Philippine Statistics Authority, Barangay Sinalugan had a population of 688. This made it the 12th largest of 26 barangays in San Guillermo by population, placing it in the middle tier of the municipality. Residents of Barangay Sinalugan accounted for approximately 3.29% of the total population of San Guillermo, which stood at 20,915 in the same census year.

Census comparisons between 2015 and 2020 show Barangay Sinalugan moving from 657 residents to 688 residents, an intercensal change of +4.7%. The trajectory indicates a growing community. The Philippine Statistics Authority classifies Barangay Sinalugan as rural, a designation applied to barangays with lower population density and predominantly non-built-up land use.

San Guillermo is a municipality comprising 26 barangays, and serves as the governing unit directly responsible for local services in Barangay Sinalugan, including public health, sanitation, peace and order, and civil registration. Within the wider province of Isabela, which contains 1,055 barangays across its component cities and municipalities, Barangay Sinalugan ranks 832nd by 2020 population. Isabela is classified as a 1st by the Bureau of Local Government Finance, a category that reflects the province's annual regular income.

Barangay Sinalugan 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.