Barangay Don Roque Ablan Sr.

Situated in Calanasan, Apayao, Barangay Don Roque Ablan Sr. is one of 18 barangays that make up the municipality within CAR.

According to the 2020 Philippine census, Barangay Don Roque Ablan Sr. had a population of 223. This made it the 17th largest of 18 barangays in Calanasan by population, placing it among the smaller barangays of the municipality. Residents of Barangay Don Roque Ablan Sr. accounted for approximately 1.78% of the total population of Calanasan, which stood at 12,550 in the same census year.

The barangay recorded 239 residents in the 2015 intercensal count and 223 residents in the 2020 Census — a net change of -6.7%, consistent with a contracting settlement. Barangay Don Roque Ablan Sr. is officially classified as rural, a designation applied to barangays with lower population density and predominantly non-built-up land use.

Calanasan is a municipality comprising 18 barangays, and serves as the governing unit directly responsible for local services in Barangay Don Roque Ablan Sr., including public health, sanitation, peace and order, and civil registration. Within the wider province of Apayao, which contains 133 barangays across its component cities and municipalities, Barangay Don Roque Ablan Sr. ranks 128th by 2020 population. Apayao is classified as a 3rd by the Bureau of Local Government Finance, a category that reflects the province's annual regular income.

Barangay Don Roque Ablan Sr. 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.