Barangay Osmeña

Barangay Osmeña forms part of Marabut, a municipality in Samar, and is classified as a small barangay.

According to the 2020 Philippine census, Barangay Osmeña had a population of 1,332. This made it the 3rd largest of 24 barangays in Marabut by population, placing it among the most populous barangays of the municipality. Residents of Barangay Osmeña accounted for approximately 7.47% of the total population of Marabut, which stood at 17,842 in the same census year.

Census comparisons between 2015 and 2020 show Barangay Osmeña moving from 1,461 residents to 1,332 residents, an intercensal change of -8.8%. The trajectory indicates a contracting community. Barangay Osmeña is officially classified as rural, a designation applied to barangays with lower population density and predominantly non-built-up land use.

Marabut is a municipality comprising 24 barangays, and serves as the governing unit directly responsible for local services in Barangay Osmeña, including public health, sanitation, peace and order, and civil registration. Within the wider province of Samar, which contains 951 barangays across its component cities and municipalities, Barangay Osmeña ranks 154th by 2020 population. Samar is classified as a 1st by the Bureau of Local Government Finance, a category that reflects the province's annual regular income.

Barangay Osmeña 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.