Barangay Poblacion Bajo

Situated in Sergio osmeña Sr., Zamboanga Del Norte, Barangay Poblacion Bajo is one of 39 barangays that make up the municipality within Zamboanga Peninsula.

According to the 2020 Philippine census, Barangay Poblacion Bajo had a population of 1,718. This made it the 4th largest of 39 barangays in Sergio osmeña Sr. by population, placing it among the most populous barangays of the municipality. Residents of Barangay Poblacion Bajo accounted for approximately 5.38% of the total population of Sergio osmeña Sr., which stood at 31,942 in the same census year.

Census comparisons between 2015 and 2020 show Barangay Poblacion Bajo moving from 1,423 residents to 1,718 residents, an intercensal change of +20.7%. The trajectory indicates a growing community. Barangay Poblacion Bajo is officially classified as rural, a designation applied to barangays with lower population density and predominantly non-built-up land use.

Sergio osmeña Sr. is a municipality comprising 39 barangays, and serves as the governing unit directly responsible for local services in Barangay Poblacion Bajo, including public health, sanitation, peace and order, and civil registration. Within the wider province of Zamboanga Del Norte, which contains 691 barangays across its component cities and municipalities, Barangay Poblacion Bajo ranks 180th by 2020 population. Zamboanga Del Norte is classified as a 1st by the Bureau of Local Government Finance, a category that reflects the province's annual regular income.

Barangay Poblacion Bajo 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.