Barangay Seriac

Situated in Siayan, Zamboanga Del Norte, Barangay Seriac is one of 22 barangays that make up the municipality within Zamboanga Peninsula.

According to the 2020 Census of Population and Housing conducted by the Philippine Statistics Authority, Barangay Seriac had a population of 916. This made it the 20th largest of 22 barangays in Siayan by population, placing it among the smaller barangays of the municipality. Residents of Barangay Seriac accounted for approximately 2.53% of the total population of Siayan, which stood at 36,236 in the same census year.

Census comparisons between 2015 and 2020 show Barangay Seriac moving from 919 residents to 916 residents, an intercensal change of -0.3%. The trajectory indicates a broadly stable community. The Philippine Statistics Authority classifies Barangay Seriac as rural, a designation applied to barangays with lower population density and predominantly non-built-up land use.

Siayan is a municipality comprising 22 barangays, and serves as the governing unit directly responsible for local services in Barangay Seriac, including public health, sanitation, peace and order, and civil registration. Within the wider province of Zamboanga Del Norte, which contains 691 barangays across its component cities and municipalities, Barangay Seriac ranks 426th by 2020 population. Zamboanga Del Norte 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.