Barangay Santa Maria

Barangay Santa Maria forms part of Lopez, a municipality in Quezon, and is classified as a small barangay.

According to the 2020 Census of Population and Housing conducted by the Philippine Statistics Authority, Barangay Santa Maria had a population of 673. This made it the 47th largest of 95 barangays in Lopez by population, placing it in the middle tier of the municipality. Residents of Barangay Santa Maria accounted for approximately 0.71% of the total population of Lopez, which stood at 94,657 in the same census year.

Between the 2015 and 2020 censuses, the population of Barangay Santa Maria changed from 714 to 673, a shift of -5.7% over the five-year period. This places the barangay among those with contracting populations in Lopez. The Philippine Statistics Authority classifies Barangay Santa Maria 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 Santa Maria, 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 Santa Maria ranks 813th 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 Santa Maria 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.