Barangay Old Poblacion

Barangay Old Poblacion forms part of Buenavista, a municipality in Guimaras, and is classified as a small barangay.

According to the 2020 Philippine census, Barangay Old Poblacion had a population of 1,226. This made it the 21st largest of 36 barangays in Buenavista by population, placing it in the middle tier of the municipality. Residents of Barangay Old Poblacion accounted for approximately 2.32% of the total population of Buenavista, which stood at 52,899 in the same census year.

The barangay recorded 1,234 residents in the 2015 intercensal count and 1,226 residents in the 2020 Census — a net change of -0.6%, consistent with a broadly stable settlement. Barangay Old Poblacion is officially classified as rural, a designation applied to barangays with lower population density and predominantly non-built-up land use.

Buenavista is a municipality comprising 36 barangays, and serves as the governing unit directly responsible for local services in Barangay Old Poblacion, including public health, sanitation, peace and order, and civil registration. Within the wider province of Guimaras, which contains 98 barangays across its component cities and municipalities, Barangay Old Poblacion ranks 73rd by 2020 population. Guimaras is classified as a 4th 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.