Sablayan is a first class municipality in the province of Occidental Mindoro, Philippines. According to the 2010 census, it has a population of 76,153 people. It has a total land area of 2,188.80 square kilometers, making it the largest municipality in the Philippines. The Apo Reef is part of its jurisdiction.
Sablayan is located in the central part of Occidental Mindoro. It is bounded to the north by the municipality of Santa Cruz and the municipalities of Baco, Naujan, Victoria and Socorro all in Oriental Mindoro province; to the east by the municipalities of Pinamalayan, Gloria, Bansud, Bongabong and Mansalay also in Oriental Mindoro; to the south by the municipality of Calintaan; and to the west by the Mindoro Strait.
