Normally, population density is presented by taking into consideration the population and the total land area of the place. Since population of the Barangays of the municipality of San Luis is characterized by being sited mostly on lowlands (A&D) and partially in forestland, it was decided to present population density both based on the total land area and estimated inhabited area. The latter will provide a more realistic figure for population density as the majority of the Barangay population are living on the lowlands