Region IV-B MIMAROPA — Region — Map of the Philippines showing the location of Region IV-B Country: Philippines Island group: Luzon Regional center: Calapan City, Oriental Mindoro Area – Total 29,621 km2 (11,436.7 sq mi) Population (2007) – Total 2,559,791 – Density: 86.4/km2 (223.8/sq mi) Time zone: PST (UTC+8) Provinces: 5 Cities: 2 Municipalities: 71 Barangays: 1458 Cong. districts: 7 Languages: Tagalog, Romblomanon, Bantoanon or Asi, Onhan, Cuyonon and languages spoken by Mangyans and Palawan.