Barangay Union

Classified as a small barangay, Barangay Union is one of the administrative divisions of Madrid in Surigao Del Sur, Caraga, Philippines.

According to the 2020 Philippine census, Barangay Union had a population of 1,308. This made it the 6th largest of 14 barangays in Madrid by population, placing it in the middle tier of the municipality. Residents of Barangay Union accounted for approximately 7.85% of the total population of Madrid, which stood at 16,653 in the same census year.

Census comparisons between 2015 and 2020 show Barangay Union moving from 1,348 residents to 1,308 residents, an intercensal change of -3.0%. The trajectory indicates a contracting community. Barangay Union is officially classified as rural, a designation applied to barangays with lower population density and predominantly non-built-up land use.

Madrid is a municipality comprising 14 barangays, and serves as the governing unit directly responsible for local services in Barangay Union, including public health, sanitation, peace and order, and civil registration. Within the wider province of Surigao Del Sur, which contains 309 barangays across its component cities and municipalities, Barangay Union ranks 181st by 2020 population. Surigao Del Sur 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 Union 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.