Barangay Poblacion West IV

Classified as a small barangay, Barangay Poblacion West IV is one of the administrative divisions of Aliaga in Nueva Ecija, Central Luzon, Philippines.

According to the 2020 Census of Population and Housing conducted by the Philippine Statistics Authority, Barangay Poblacion West IV had a population of 696. This made it the 26th largest of 26 barangays in Aliaga by population, placing it among the smaller barangays of the municipality. Residents of Barangay Poblacion West IV accounted for approximately 0.99% of the total population of Aliaga, which stood at 70,363 in the same census year.

Between the 2015 and 2020 censuses, the population of Barangay Poblacion West IV changed from 726 to 696, a shift of -4.1% over the five-year period. This places the barangay among those with contracting populations in Aliaga. The Philippine Statistics Authority classifies Barangay Poblacion West IV as rural, a designation applied to barangays with lower population density and predominantly non-built-up land use.

Aliaga is a municipality comprising 26 barangays, and serves as the governing unit directly responsible for local services in Barangay Poblacion West IV, including public health, sanitation, peace and order, and civil registration. Within the wider province of Nueva Ecija, which contains 849 barangays across its component cities and municipalities, Barangay Poblacion West IV ranks 792nd by 2020 population. Nueva Ecija is classified as a 1st by the Bureau of Local Government Finance, a category that reflects the province's annual regular income.

Barangay Poblacion West IV 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.