Barangay Tomalaytay

Barangay Tomalaytay forms part of Castilla, 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 Tomalaytay had a population of 1,154. This made it the 22nd largest of 34 barangays in Castilla by population, placing it in the middle tier of the municipality. Residents of Barangay Tomalaytay accounted for approximately 1.90% of the total population of Castilla, which stood at 60,635 in the same census year.

Census comparisons between 2015 and 2020 show Barangay Tomalaytay moving from 1,180 residents to 1,154 residents, an intercensal change of -2.2%. The trajectory indicates a contracting community. The Philippine Statistics Authority classifies Barangay Tomalaytay as rural, a designation applied to barangays with lower population density and predominantly non-built-up land use.

Castilla is a municipality comprising 34 barangays, and serves as the governing unit directly responsible for local services in Barangay Tomalaytay, 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 Tomalaytay ranks 280th 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.