May 17, 2002 marks the implementation of Executive Order No. 103 dividing Region IV into Regions IV-A (CALABARZON) and IV-B (MIMAROPA), and transferring the Province of Aurora Region III.
The MIMAROPA Region consists of five (5) island provinces namely: Mindoro Occidental, Mindoro Oriental, Marinduque, Romblon and Palawan. These island provinces cover 2,661,195 hectares of land which represents 8.87% of the country’s total land area. The Province of Palawan has the largest area while the Province of Marinduque has the smallest area. The Region also boasts of diverse and vast coastal areas suitable for aquaculture activities.
Topographic Description/Boundaries Climate
Occ. Mindoro Situated in the western portion of the Mindoro Island, The Province has flat, sandy areas and terrain which becomes rugged and rough as it gets to the hinterlands. It is generally undulating along the western coastal boundary facing the China Sea and gradually rising towards the interior along the eastern and northwestern parts. There are successive mountain ranges, intermittent valleys and elongated plateaus and rolling prairie lands along the coastal regions.
The island is bounded on the north by the Verde Island Passage, on the west and south by Mindoro Strait and along the east by Oriental Mindoro.
The Island lies along the typhoon belt. Its wet season is from June to October while its dry season starts from November and ends in May.
Or. Mindoro Situated in the eastern portion of the Mindoro Island. The province consists of vast plains with occasional and moderately sloping hills. It is also predominantly mountainous in the western part.
Oriental Mindoro is bounded on the north by Verde Island Passage, on the east by Maestro de Ocampo Island and Tablas Strait, on the south by Semirara Island and on the west by Occidental Mindoro.
The dry climate is relatively long from January to May with occasional rainfall in mid-June to July.
Marinduque Situated almost at the center of the Philippines Archipelago, Marinduque is an island with rich mineral resources and fertile plains. The terrain is generally rugged with rough mountains and few scattered alluvial plains occurring as pockets along the coasts. The terrain is flat in the towns of Boac, Mogpog, Gazan and portions of Buenavista.
The island is bounded on the north side by Tayabas Bay, on the northeast by Mogpog Bay, on the southwest by Tayabas Strait and on the south by Sibuyan Sea.
Romblon The Island is situated in the heart of the Philippine Islands. It is generally hilly with mountainous terrain and with narrow strips of coastal low lands. Low hills and low lands characterize some part of the Island.
Romblon consists of Tablas Island and Sibuyan Island. Tablas is the largest island, which is 70 kms long and 17 kms wide with continuous rolling plain in the western part. Sibuyan Island is kidney-shaped and its mountains are marked with heavy and thick forests.
The Island is bounded on the north by Tablas Island, on the west by Mindoro Province, on the north by Marinduque Province, on the northeast by the Bicol Peninsula and on the southeast by Masbate Province
Romblon is dry during the months of March to April and wet during the rest of the year.
Palawan Lies in the southwest and west part of the main group of the Philippine Islands. It is an archipelago composed of 1,768 small islands, most important of which are Busuanga, Culion, Linapacan, Cuyo, Dumaran, Cagayancillo and Balabac. The Province is rugged and mountainous in the southern side, hilly and with highly irregular and indented coastlines. Along the east and west coasts are heavy forests with rolling plains. Rivers and streams characterize the eastern section, and the most unusual river is the underground rivers flowing under limestone rocks for about 7 kilometers. There are no navigable waters in the Province.
The Island is bounded on the north by Mindoro Province, on the west by China Sea, on the south by North Borneo and on the east by the Sulu Sea.
Palawan is dry from November to April and wet during the rest of the year.
Major Fishing Grounds
Occ. Mindoro: Mindoro Strait, Offshore of Palawan, South China Sea
Or. Mindoro: Mindoro Strait, Coron Bay, Tablas Strait, Paluan Bay
Marinduque: Calancang Bay, Masaguisi Bay, Sta. Cruz Bay, Marlangga Bay, Torrijos Bay, Ulan Bay, Sayao Bay, Bolanacay Bay
Romblon: Tablas Strait, Romblon Pass, Sibuyan Sea
Palawan: Coron Bay, Taytay Bay, Cuyo Pass, Imunan Bay, Malampaya Sound, San Miguel Bay, Calawag Bay, Ulugan Bay, Sombrero Coast, San Antonio Bay, Puerto Princesa Bay, Green Island Bay, Honda Bay, Malunao Bay, West Sulu Sea, South China Sea