Barangay Old Mahayag

Barangay Old Mahayag forms part of City of Catbalogan, a city in Samar, and is classified as a small barangay.

According to the 2020 Philippine census, Barangay Old Mahayag had a population of 1,434. This made it the 21st largest of 57 barangays in City of Catbalogan by population, placing it in the middle tier of the city. Residents of Barangay Old Mahayag accounted for approximately 1.35% of the total population of City of Catbalogan, which stood at 106,440 in the same census year.

Census comparisons between 2015 and 2020 show Barangay Old Mahayag moving from 1,388 residents to 1,434 residents, an intercensal change of +3.3%. The trajectory indicates a growing community. Barangay Old Mahayag is officially classified as rural, a designation applied to barangays with lower population density and predominantly non-built-up land use.

City of Catbalogan is a city comprising 57 barangays, and serves as the governing unit directly responsible for local services in Barangay Old Mahayag, 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 Old Mahayag ranks 127th 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 Old Mahayag 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.