Barangay San Antonio

Classified as a mid-sized barangay, Barangay San Antonio is one of the administrative divisions of Barotac Viejo in Iloilo, Western Visayas, Philippines.

According to the 2020 Census of Population and Housing conducted by the Philippine Statistics Authority, Barangay San Antonio had a population of 2,185. This made it the 7th largest of 26 barangays in Barotac Viejo by population, placing it in the upper half of the municipality. Residents of Barangay San Antonio accounted for approximately 4.49% of the total population of Barotac Viejo, which stood at 48,614 in the same census year.

The barangay recorded 2,076 residents in the 2015 intercensal count and 2,185 residents in the 2020 Census — a net change of +5.3%, consistent with a growing settlement. The Philippine Statistics Authority classifies Barangay San Antonio as urban, reflecting the density and built-up character of the area.

Barotac Viejo is a municipality comprising 26 barangays, and serves as the governing unit directly responsible for local services in Barangay San Antonio, including public health, sanitation, peace and order, and civil registration. Within the wider province of Iloilo, which contains 1,901 barangays across its component cities and municipalities, Barangay San Antonio ranks 222nd by 2020 population. Iloilo 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.