Barangay Buenavista

Barangay Buenavista forms part of Guiuan, a municipality in Eastern Samar, and is classified as a small barangay.

According to the 2020 Philippine census, Barangay Buenavista had a population of 721. This made it the 23rd largest of 60 barangays in Guiuan by population, placing it in the middle tier of the municipality. Residents of Barangay Buenavista accounted for approximately 1.35% of the total population of Guiuan, which stood at 53,361 in the same census year.

Census comparisons between 2015 and 2020 show Barangay Buenavista moving from 695 residents to 721 residents, an intercensal change of +3.7%. The trajectory indicates a growing community. Barangay Buenavista is officially classified as rural, a designation applied to barangays with lower population density and predominantly non-built-up land use.

Guiuan is a municipality comprising 60 barangays, and serves as the governing unit directly responsible for local services in Barangay Buenavista, including public health, sanitation, peace and order, and civil registration. Within the wider province of Eastern Samar, which contains 597 barangays across its component cities and municipalities, Barangay Buenavista ranks 251st by 2020 population. Eastern Samar is classified as a 2nd 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.