Barangay San Andres

Classified as a small barangay, Barangay San Andres is one of the administrative divisions of Lopez in Quezon, CALABARZON, Philippines.

According to the 2020 Census of Population and Housing conducted by the Philippine Statistics Authority, Barangay San Andres had a population of 828. This made it the 35th largest of 95 barangays in Lopez by population, placing it in the middle tier of the municipality. Residents of Barangay San Andres accounted for approximately 0.87% of the total population of Lopez, which stood at 94,657 in the same census year.

Census comparisons between 2015 and 2020 show Barangay San Andres moving from 864 residents to 828 residents, an intercensal change of -4.2%. The trajectory indicates a contracting community. 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.

Lopez is a municipality comprising 95 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 Quezon, which contains 1,242 barangays across its component cities and municipalities, Barangay San Andres ranks 706th by 2020 population. Quezon is classified as a 1st 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.