Barangay San Luis

Situated in Roxas, Isabela, Barangay San Luis is one of 26 barangays that make up the municipality within Cagayan Valley.

According to the 2020 Philippine census, Barangay San Luis had a population of 1,511. This made it the 17th largest of 26 barangays in Roxas by population, placing it in the middle tier of the municipality. Residents of Barangay San Luis accounted for approximately 2.29% of the total population of Roxas, which stood at 65,839 in the same census year.

Census comparisons between 2015 and 2020 show Barangay San Luis moving from 1,401 residents to 1,511 residents, an intercensal change of +7.9%. The trajectory indicates a growing community. Barangay San Luis is officially classified as rural, a designation applied to barangays with lower population density and predominantly non-built-up land use.

Roxas is a municipality comprising 26 barangays, and serves as the governing unit directly responsible for local services in Barangay San Luis, including public health, sanitation, peace and order, and civil registration. Within the wider province of Isabela, which contains 1,055 barangays across its component cities and municipalities, Barangay San Luis ranks 420th by 2020 population. Isabela 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.