Capul is a fifth class island municipality in the province of Northern Samar, Philippines. According to the 2010 census, it has a population of 12,659 people. Prior to its founding as a town, Capul Island itself with its lighthouse built on the island, served as a guidepost for the Acapulco-Manila galleon trade vessels passing through the treacherous waters of San Bernardino Strait. It also served as the capital of Samar from 1848 to 1852.