Oriental Mindoro ( and ) is a province in the Philippines located in the island of Mindoro under MIMAROPA region in Luzon, about 140 km southwest of Manila. The province is bordered by the Verde Island Passage and the rest of Batangas to the north, by Marinduque, Maestre de Campo (or known as Sibale but official name is Concepcion) Island, Tablas Strait and the rest of Romblon to the east, by Semirara and the rest of Caluya Islands, Antique to the south, and by Occidental Mindoro to the west. Calapan City, the only city in the island, is the provincial capital.