Barangay Arellano (Pob.)

Situated in Quezon, Isabela, Barangay Arellano (Pob.) is one of 15 barangays that make up the municipality within Cagayan Valley.

According to the 2020 Philippine census, Barangay Arellano (Pob.) had a population of 2,831. This made it the 4th largest of 15 barangays in Quezon by population, placing it in the upper half of the municipality. Residents of Barangay Arellano (Pob.) accounted for approximately 10.47% of the total population of Quezon, which stood at 27,037 in the same census year.

Census comparisons between 2015 and 2020 show Barangay Arellano (Pob.) moving from 2,877 residents to 2,831 residents, an intercensal change of -1.6%. The trajectory indicates a broadly stable community. Barangay Arellano (Pob.) is officially classified as urban, reflecting the density and built-up character of the area.

Quezon is a municipality comprising 15 barangays, and serves as the governing unit directly responsible for local services in Barangay Arellano (Pob.), including public health, sanitation, peace and order, and civil registration. Within the wider province of Isabela, which contains 1,055 barangays across its component cities and municipalities, Barangay Arellano (Pob.) ranks 122nd by 2020 population. Isabela is classified as a 1st by the Bureau of Local Government Finance, a category that reflects the province's annual regular income.

Like every Philippine barangay, Barangay Arellano (Pob.) is led by an elected Punong Barangay (barangay captain) supported by seven Sangguniang Barangay members (kagawads), an SK Chairperson, a Barangay Secretary, and a Barangay Treasurer. The next Barangay and Sangguniang Kabataan Elections (BSKE) are scheduled for Monday, November 2, 2026, with officials serving four-year terms under Republic Act No. 12232.