Barangay Biyan

Barangay Biyan forms part of Calauag, a municipality in Quezon, and is classified as a small barangay.

According to the 2020 Census of Population and Housing conducted by the Philippine Statistics Authority, Barangay Biyan had a population of 1,605. This made it the 9th largest of 81 barangays in Calauag by population, placing it among the most populous barangays of the municipality. Residents of Barangay Biyan accounted for approximately 2.24% of the total population of Calauag, which stood at 71,809 in the same census year.

The barangay recorded 1,509 residents in the 2015 intercensal count and 1,605 residents in the 2020 Census — a net change of +6.4%, consistent with a growing settlement. The Philippine Statistics Authority classifies Barangay Biyan as rural, a designation applied to barangays with lower population density and predominantly non-built-up land use.

Calauag is a municipality comprising 81 barangays, and serves as the governing unit directly responsible for local services in Barangay Biyan, including public health, sanitation, peace and order, and civil registration. Within the wider province of Quezon, which contains 1,242 barangays across its component cities and municipalities, Barangay Biyan ranks 403rd by 2020 population. Quezon 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.