Dubbed as "Marine Wonderland," the fantastic land that is Occidental Mindoro is endowed with marine beauty from its virgin forests, beautiful white sand beaches, islands and islets rich in marine life, coral gardens, mysterious caves, and cascading waterfalls.

It has one of the country's wondrous secret hideaways, the Apo Reef, which is regarded as the second largest in the world. This 34-kilometer reef in Sablayan, which is located in Apo Island, is acclaimed as the best in Asia and as the diving mecca of the Philippines. The Apo Reef Marine Park includes the fascinating bird-populated islands of Binangaan and Cajos del Bajo, which are surrounded by waters with over 500 species of marine life and luxuriant coral growth represented by approximately 400 to 500 kaleidoscopic coral species.

Occidental Mindoro is politically governed by a Provincial Governor, as in other provinces and municipal mayors. It is divided into eleven municipalities: Abra de Ilog, Calintaan, Looc, Lubang, Magsaysay, Mamburao, Paluan, Rizal, Sablayan, San Jose, and Sta.Cruz.

The entire island of Mindoro, which is separated from the Southern Luzon mainland, is composed of Occidental Mindoro and Oriental Mindoro. These two provinces are separated by a mountain range, running through the entire length of the island, which serves as a natural and political boundary.

Occidental Mindoro is situated along the western part of the island, located south of the province of Batangas in Southern Luzon. On the north, it is bounded by Verde Island Passage, on the west and the south by Mindoro Strait, and on the east by Oriental Mindoro.