Barangay Opsan

Barangay Opsan forms part of Tobias Fornier, a municipality in Antique, and is classified as a small barangay.

According to the 2020 Philippine census, Barangay Opsan had a population of 659. This made it the 18th largest of 50 barangays in Tobias Fornier by population, placing it in the middle tier of the municipality. Residents of Barangay Opsan accounted for approximately 1.95% of the total population of Tobias Fornier, which stood at 33,816 in the same census year.

The barangay recorded 624 residents in the 2015 intercensal count and 659 residents in the 2020 Census — a net change of +5.6%, consistent with a growing settlement. Barangay Opsan is officially classified as rural, a designation applied to barangays with lower population density and predominantly non-built-up land use.

Tobias Fornier is a municipality comprising 50 barangays, and serves as the governing unit directly responsible for local services in Barangay Opsan, including public health, sanitation, peace and order, and civil registration. Within the wider province of Antique, which contains 590 barangays across its component cities and municipalities, Barangay Opsan ranks 344th by 2020 population. Antique is classified as a 2nd by the Bureau of Local Government Finance, a category that reflects the province's annual regular income.

Barangay Opsan 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.