Barangay Baguidbirin

Barangay Baguidbirin forms part of Santa Cruz, a municipality in Marinduque, and is classified as a very small barangay.

According to the 2020 Philippine census, Barangay Baguidbirin had a population of 150. This made it the 55th largest of 55 barangays in Santa Cruz by population, placing it among the smaller barangays of the municipality. Residents of Barangay Baguidbirin accounted for approximately 0.27% of the total population of Santa Cruz, which stood at 54,692 in the same census year.

Census comparisons between 2015 and 2020 show Barangay Baguidbirin moving from 187 residents to 150 residents, an intercensal change of -19.8%. The trajectory indicates a contracting community. Barangay Baguidbirin is officially classified as rural, a designation applied to barangays with lower population density and predominantly non-built-up land use.

Santa Cruz is a municipality comprising 55 barangays, and serves as the governing unit directly responsible for local services in Barangay Baguidbirin, including public health, sanitation, peace and order, and civil registration. Within the wider province of Marinduque, which contains 218 barangays across its component cities and municipalities, Barangay Baguidbirin ranks 217th by 2020 population. Marinduque is classified as a 4th by the Bureau of Local Government Finance, a category that reflects the province's annual regular income.

Like every Philippine barangay, Barangay Baguidbirin 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.