Barangay Casili

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

According to the 2020 Census of Population and Housing conducted by the Philippine Statistics Authority, Barangay Casili had a population of 1,134. This made it the 25th largest of 42 barangays in Gubat by population, placing it in the middle tier of the municipality. Residents of Barangay Casili accounted for approximately 1.88% of the total population of Gubat, which stood at 60,294 in the same census year.

Census comparisons between 2015 and 2020 show Barangay Casili moving from 1,101 residents to 1,134 residents, an intercensal change of +3.0%. The trajectory indicates a growing community. The Philippine Statistics Authority classifies Barangay Casili as rural, a designation applied to barangays with lower population density and predominantly non-built-up land use.

Gubat is a municipality comprising 42 barangays, and serves as the governing unit directly responsible for local services in Barangay Casili, 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 Casili ranks 285th 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.

The barangay's legislative and executive affairs are handled by a Punong Barangay and the Sangguniang Barangay, elected nationwide during the Barangay and SK Elections. The next BSKE is scheduled for Monday, November 2, 2026, following the synchronized election schedule set by COMELEC Resolution No. 11191.