Occidental Mindoro (Tagalog: Kanlurang Mindoro), officially the Province of Occidental Mindoro (Tagalog: Lalawigan ng Kanlurang Mindoro), is a province in the Philippines located in the Mimaropa region. The province occupies the western half of the island of Mindoro. Its capital is Mamburao, but the most populous municipality is San Jose. Sablayan is its largest municipality in terms of area, occupying almost half of the entire province. As of 2020, Occidental Mindoro has 525,354 inhabitants.