Barangay Santo Domingo

Situated in Prieto Diaz, Sorsogon, Barangay Santo Domingo is one of 23 barangays that make up the municipality within Bicol Region.

According to the 2020 Census of Population and Housing conducted by the Philippine Statistics Authority, Barangay Santo Domingo had a population of 311. This made it the 23rd largest of 23 barangays in Prieto Diaz by population, placing it among the smaller barangays of the municipality. Residents of Barangay Santo Domingo accounted for approximately 1.37% of the total population of Prieto Diaz, which stood at 22,644 in the same census year.

Census comparisons between 2015 and 2020 show Barangay Santo Domingo moving from 331 residents to 311 residents, an intercensal change of -6.0%. The trajectory indicates a contracting community. The Philippine Statistics Authority classifies Barangay Santo Domingo as rural, a designation applied to barangays with lower population density and predominantly non-built-up land use.

Prieto Diaz is a municipality comprising 23 barangays, and serves as the governing unit directly responsible for local services in Barangay Santo Domingo, 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 Santo Domingo ranks 529th 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.