Barangay San Andres

Classified as a very small barangay, Barangay San Andres is one of the administrative divisions of Bato in Catanduanes, Bicol Region, Philippines.

According to the 2020 Census of Population and Housing conducted by the Philippine Statistics Authority, Barangay San Andres had a population of 437. This made it the 18th largest of 27 barangays in Bato by population, placing it in the middle tier of the municipality. Residents of Barangay San Andres accounted for approximately 2.01% of the total population of Bato, which stood at 21,748 in the same census year.

The barangay recorded 363 residents in the 2015 intercensal count and 437 residents in the 2020 Census — a net change of +20.4%, consistent with a growing settlement. The Philippine Statistics Authority classifies Barangay San Andres as rural, a designation applied to barangays with lower population density and predominantly non-built-up land use.

Bato is a municipality comprising 27 barangays, and serves as the governing unit directly responsible for local services in Barangay San Andres, including public health, sanitation, peace and order, and civil registration. Within the wider province of Catanduanes, which contains 315 barangays across its component cities and municipalities, Barangay San Andres ranks 235th by 2020 population. Catanduanes is classified as a 3rd by the Bureau of Local Government Finance, a category that reflects the province's annual regular income.

Like every Philippine barangay, Barangay San Andres is led by an elected Punong Barangay (barangay captain) supported by seven Sangguniang Barangay members (kagawads), an SK Chairperson, a Barangay Secretary, and a Barangay Treasurer. The next Barangay and Sangguniang Kabataan Elections (BSKE) are scheduled for Monday, November 2, 2026, with officials serving four-year terms under Republic Act No. 12232.