Barangay Castillo

Situated in Cabusao, Camarines Sur, Barangay Castillo is one of 9 barangays that make up the municipality within Bicol Region.

According to the 2020 Philippine census, Barangay Castillo had a population of 5,104. This made it the 1st largest of 9 barangays in Cabusao by population, placing it among the most populous barangays of the municipality. Residents of Barangay Castillo accounted for approximately 26.50% of the total population of Cabusao, which stood at 19,257 in the same census year.

Between the 2015 and 2020 censuses, the population of Barangay Castillo changed from 5,143 to 5,104, a shift of -0.8% over the five-year period. This places the barangay among those with broadly stable populations in Cabusao. Barangay Castillo is officially classified as urban, reflecting the density and built-up character of the area.

Cabusao is a municipality comprising 9 barangays, and serves as the governing unit directly responsible for local services in Barangay Castillo, including public health, sanitation, peace and order, and civil registration. Within the wider province of Camarines Sur, which contains 1,063 barangays across its component cities and municipalities, Barangay Castillo ranks 50th by 2020 population. Camarines Sur is classified as a 1st 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.