Barangay Poblacion I

Barangay Poblacion I forms part of Santa Magdalena, a municipality in Sorsogon, and is classified as a small barangay.

According to the 2020 Philippine census, Barangay Poblacion I had a population of 1,091. This made it the 8th largest of 14 barangays in Santa Magdalena by population, placing it in the middle tier of the municipality. Residents of Barangay Poblacion I accounted for approximately 6.38% of the total population of Santa Magdalena, which stood at 17,096 in the same census year.

The barangay recorded 1,139 residents in the 2015 intercensal count and 1,091 residents in the 2020 Census — a net change of -4.2%, consistent with a contracting settlement. Barangay Poblacion I is officially classified as rural, a designation applied to barangays with lower population density and predominantly non-built-up land use.

Santa Magdalena is a municipality comprising 14 barangays, and serves as the governing unit directly responsible for local services in Barangay Poblacion I, including public health, sanitation, peace and order, and civil registration. Within the wider province of Sorsogon, which contains 541 barangays across its component cities and municipalities, Barangay Poblacion I ranks 301st by 2020 population. Sorsogon is classified as a 2nd by the Bureau of Local Government Finance, a category that reflects the province's annual regular income.

Barangay Poblacion I 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.