Barangay Ballaigui (Pob.)

Situated in Sinait, Ilocos Sur, Barangay Ballaigui (Pob.) is one of 44 barangays that make up the municipality within Ilocos Region.

According to the 2020 Philippine census, Barangay Ballaigui (Pob.) had a population of 573. This made it the 18th largest of 44 barangays in Sinait by population, placing it in the middle tier of the municipality. Residents of Barangay Ballaigui (Pob.) accounted for approximately 2.20% of the total population of Sinait, which stood at 25,998 in the same census year.

Census comparisons between 2015 and 2020 show Barangay Ballaigui (Pob.) moving from 649 residents to 573 residents, an intercensal change of -11.7%. The trajectory indicates a contracting community. Barangay Ballaigui (Pob.) is officially classified as rural, a designation applied to barangays with lower population density and predominantly non-built-up land use.

Sinait is a municipality comprising 44 barangays, and serves as the governing unit directly responsible for local services in Barangay Ballaigui (Pob.), 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 Ballaigui (Pob.) ranks 528th 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.

The barangay's legislative and executive affairs are handled by a Punong Barangay and the Sangguniang Barangay, elected nationwide during the Barangay and SK Elections. The next BSKE is scheduled for Monday, November 2, 2026, following the synchronized election schedule set by COMELEC Resolution No. 11191.