Barangay Inlagadian

Barangay Inlagadian forms part of Casiguran, a municipality in Sorsogon, and is classified as a small barangay.

According to the 2020 Philippine census, Barangay Inlagadian had a population of 1,818. This made it the 5th largest of 25 barangays in Casiguran by population, placing it in the upper half of the municipality. Residents of Barangay Inlagadian accounted for approximately 5.11% of the total population of Casiguran, which stood at 35,602 in the same census year.

Census comparisons between 2015 and 2020 show Barangay Inlagadian moving from 1,513 residents to 1,818 residents, an intercensal change of +20.2%. The trajectory indicates a growing community. Barangay Inlagadian is officially classified as rural, a designation applied to barangays with lower population density and predominantly non-built-up land use.

Casiguran is a municipality comprising 25 barangays, and serves as the governing unit directly responsible for local services in Barangay Inlagadian, 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 Inlagadian ranks 145th 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 Inlagadian 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.