Barangay Ibabang Bagumbungan

Barangay Ibabang Bagumbungan forms part of Pagbilao, a municipality in Quezon, and is classified as a very small barangay.

According to the 2020 Census of Population and Housing conducted by the Philippine Statistics Authority, Barangay Ibabang Bagumbungan had a population of 486. This made it the 23rd largest of 27 barangays in Pagbilao by population, placing it among the smaller barangays of the municipality. Residents of Barangay Ibabang Bagumbungan accounted for approximately 0.62% of the total population of Pagbilao, which stood at 78,700 in the same census year.

Census comparisons between 2015 and 2020 show Barangay Ibabang Bagumbungan moving from 412 residents to 486 residents, an intercensal change of +18.0%. The trajectory indicates a growing community. The Philippine Statistics Authority classifies Barangay Ibabang Bagumbungan as rural, a designation applied to barangays with lower population density and predominantly non-built-up land use.

Pagbilao is a municipality comprising 27 barangays, and serves as the governing unit directly responsible for local services in Barangay Ibabang Bagumbungan, including public health, sanitation, peace and order, and civil registration. Within the wider province of Quezon, which contains 1,242 barangays across its component cities and municipalities, Barangay Ibabang Bagumbungan ranks 934th by 2020 population. Quezon is classified as a 1st by the Bureau of Local Government Finance, a category that reflects the province's annual regular income.

Barangay Ibabang Bagumbungan 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.