Barangay Banabahin Ilaya

Classified as a very small barangay, Barangay Banabahin Ilaya is one of the administrative divisions of Lopez in Quezon, CALABARZON, Philippines.

According to the 2020 Census of Population and Housing conducted by the Philippine Statistics Authority, Barangay Banabahin Ilaya had a population of 484. This made it the 60th largest of 95 barangays in Lopez by population, placing it in the middle tier of the municipality. Residents of Barangay Banabahin Ilaya accounted for approximately 0.51% of the total population of Lopez, which stood at 94,657 in the same census year.

The barangay recorded 327 residents in the 2015 intercensal count and 484 residents in the 2020 Census — a net change of +48.0%, consistent with a growing settlement. The Philippine Statistics Authority classifies Barangay Banabahin Ilaya as rural, a designation applied to barangays with lower population density and predominantly non-built-up land use.

Lopez is a municipality comprising 95 barangays, and serves as the governing unit directly responsible for local services in Barangay Banabahin Ilaya, 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 Banabahin Ilaya ranks 939th 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 Banabahin Ilaya 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.