Barangay Lomboyan

Barangay Lomboyan forms part of San Joaquin, a municipality in Iloilo, and is classified as a small barangay.

According to the 2020 Philippine census, Barangay Lomboyan had a population of 513. This made it the 38th largest of 85 barangays in San Joaquin by population, placing it in the middle tier of the municipality. Residents of Barangay Lomboyan accounted for approximately 0.97% of the total population of San Joaquin, which stood at 52,617 in the same census year.

Between the 2015 and 2020 censuses, the population of Barangay Lomboyan changed from 441 to 513, a shift of +16.3% over the five-year period. This places the barangay among those with growing populations in San Joaquin. Barangay Lomboyan is officially classified as rural, a designation applied to barangays with lower population density and predominantly non-built-up land use.

San Joaquin is a municipality comprising 85 barangays, and serves as the governing unit directly responsible for local services in Barangay Lomboyan, 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 Lomboyan ranks 1290th 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.