Barangay Patac

Barangay Patac forms part of Galimuyod, a municipality in Ilocos Sur, and is classified as a small barangay.

According to the 2020 Philippine census, Barangay Patac had a population of 1,370. This made it the 1st largest of 24 barangays in Galimuyod by population, placing it among the most populous barangays of the municipality. Residents of Barangay Patac accounted for approximately 13.37% of the total population of Galimuyod, which stood at 10,244 in the same census year.

Census comparisons between 2015 and 2020 show Barangay Patac moving from 1,433 residents to 1,370 residents, an intercensal change of -4.4%. The trajectory indicates a contracting community. Barangay Patac is officially classified as rural, a designation applied to barangays with lower population density and predominantly non-built-up land use.

Galimuyod is a municipality comprising 24 barangays, and serves as the governing unit directly responsible for local services in Barangay Patac, including public health, sanitation, peace and order, and civil registration. Within the wider province of Ilocos Sur, which contains 768 barangays across its component cities and municipalities, Barangay Patac ranks 131st by 2020 population. Ilocos 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 Patac 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.