MIMAROPA, also known as Region IV-B, is a region of the Philippines located in Luzon. The name is an acronym that stands for its provinces, which are: Occidental Mindoro, Oriental Mindoro, Marinduque, Romblon, and Palawan. There are only two cities in the entire region: Calapan City and Puerto Princesa City .

The region was created on May 17, 2002, as was Region IV-A (CALABARZON), after Region IV (Southern Tagalog) was divided.