Barangay Alianza

Classified as a mid-sized barangay, Barangay Alianza is one of the administrative divisions of City of Bago in Negros Occidental, Western Visayas, Philippines.

According to the 2020 Philippine census, Barangay Alianza had a population of 3,170. This made it the 23rd largest of 24 barangays in City of Bago by population, placing it among the smaller barangays of the city. Residents of Barangay Alianza accounted for approximately 1.66% of the total population of City of Bago, which stood at 191,210 in the same census year.

Census comparisons between 2015 and 2020 show Barangay Alianza moving from 3,211 residents to 3,170 residents, an intercensal change of -1.3%. The trajectory indicates a broadly stable community. Barangay Alianza is officially classified as rural, a designation applied to barangays with lower population density and predominantly non-built-up land use.

City of Bago is a city comprising 24 barangays, and serves as the governing unit directly responsible for local services in Barangay Alianza, including public health, sanitation, peace and order, and civil registration. Within the wider province of Negros Occidental, which contains 662 barangays across its component cities and municipalities, Barangay Alianza ranks 321st by 2020 population. Negros Occidental is classified as a 1st by the Bureau of Local Government Finance, a category that reflects the province's annual regular income.

Barangay Alianza 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.