Barangay Don Mariano Marcos

Situated in Bayombong, Nueva Vizcaya, Barangay Don Mariano Marcos is one of 25 barangays that make up the municipality within Cagayan Valley.

According to the 2020 Philippine census, Barangay Don Mariano Marcos had a population of 1,976. This made it the 17th largest of 25 barangays in Bayombong by population, placing it in the middle tier of the municipality. Residents of Barangay Don Mariano Marcos accounted for approximately 2.92% of the total population of Bayombong, which stood at 67,714 in the same census year.

Census comparisons between 2015 and 2020 show Barangay Don Mariano Marcos moving from 2,230 residents to 1,976 residents, an intercensal change of -11.4%. The trajectory indicates a contracting community. Barangay Don Mariano Marcos is officially classified as urban, reflecting the density and built-up character of the area.

Bayombong is a municipality comprising 25 barangays, and serves as the governing unit directly responsible for local services in Barangay Don Mariano Marcos, including public health, sanitation, peace and order, and civil registration. Within the wider province of Nueva Vizcaya, which contains 275 barangays across its component cities and municipalities, Barangay Don Mariano Marcos ranks 91st by 2020 population. Nueva Vizcaya is classified as a 2nd by the Bureau of Local Government Finance, a category that reflects the province's annual regular income.

Barangay Don Mariano Marcos 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.