Cape Santiago (Spanish: Cabo Santiago, Filipino: Kabo Santiago) is the southwestern point of the island of Luzon located within the municipality of Calatagan in Batangas, Philippines. It is a cape at the southern tip of Calatagan Peninsula which faces the South China Sea to the west and Pagapas Bay, an arm of Balayan Bay, to the east. The cape has been the site of a navigational aid since the 1890s. Cape Santiago is located about 130 kilometres (81 mi) southwest of Manila. It is administratively part of the barangay of Bagong Silang.