Apo is an island located in the Apo Reef in Occidental Mindoro, Philippines. It is approximately in length.
Apo Reef is a coral reef system in the Philippines situated on the western waters of Occidental Mindoro province in the Mindoro Strait. Encompassing , it is the world's second-largest contiguous coral reef system and the largest in the country. The reef and its surrounding waters are protected areas in the country administered as the Apo Reef Natural Park.